Hobby & Engineering Supplies - an MBA company

R4APP NHBB


Cross Referenced Part Numbers



R4-12B-ZZMC3 NHBB part number R4APPD



ID (d): 6.350. OD (D): 19.050. Width (B): 7.142.

Rec. Retail Price: 0.00     
(As low as in bulk)     
Stock: 53     



R4-12B-ZZMC3 NHBB part number R4APP



ID (d): 6.350. OD (D): 19.050. Width (B): 7.142.

Rec. Retail Price: 0.00     
(As low as in bulk)     
Stock: 53     


Category Matches

Games Amusement


Games - Ipad
Games - Ipad

Also see combined categories:
All Games and Gadgets

Games for the I-Pad with free App included

Includes prestige wooden puzzles and Wasgij.


Mammoth Massive Appeal RTR XTM Racing Parts
Mammoth Massive Appeal RTR XTM Racing Parts


Bearings and Spare Parts for Remote Control Models

Where alternative parts are offered, we make no claims as to their suitability. Selection of the most suitable bearings and parts is the responsibility of the customer. We recommend you replace bearings with the same type if that type is working well. High speed caged bearings are better suited to handle vibration than standard caged bearings.


Bumpers - Polyurethane - Self Adhesive
Bumpers - Polyurethane - Self Adhesive


Applies quickly and easily wherever protection is needed against nicks, scratches, scuffs and slippage.

Sold per pad - see quantity per pad in data for each item.

There is also a good range of Bumpers - Polyurethane - Self Adhesive on the Small Parts and Bearings website.


Channel - Brass
Channel - Brass


For general hobby applications.


There is also a good range of Channel - Brass on the Small Parts and Bearings website.


Gearmotors - Open Gear
Gearmotors - Open Gear


Perfect for applications where inspection of the gears is important, educational purposes or for visual effects.


There is also a good range of Gearmotors - Open Gear on the Small Parts and Bearings website.


Strip - Soft Metal Packs
Strip - Soft Metal Packs


For general hobby applications. This brass strip is annealed soft to make it easier to bend. Brass.

300mm lengths. Not recommended for heavy duty applications. For use with bearings we suggest you use items from the category - Shafting - Ground.

There is also a good range of Strip - Soft Metal Packs on the Small Parts and Bearings website.


Tools - Wire Working
Tools - Wire Working

Also see combined categories:
All Tools

For general hobby applications. Wire crimping and wire bending tools. Spring winder and spring looping.


Related Information:

There is also a good range of Tools - Wire Working on the Small Parts and Bearings website.


Spacers - Round - Hobby
Spacers - Round - Hobby

Also see combined categories:
All Round Spacers
All Flat Washers and Spacers - Non Metallic

Inexpensive nylon spacers for hobby applications


There is also a good range of Spacers - Round - Hobby on the Small Parts and Bearings website.


Balsa Wood - Assortment Packs
Balsa Wood - Assortment Packs


Delivery Surcharges May Apply on Selected Items

Balsa sizes are approximate only.

There is also a good range of Balsa Wood - Assortment Packs on the Small Parts and Bearings website.


Balls - Plastic - Polypropylene
Balls - Plastic - Polypropylene

Also see combined categories:
All Plastic Balls
All Non Metallic Balls

Excellent for liquid level float applications.

Tolerance and spherecity: up to and including 25.4mm diameter = +/-0.0508mm, over 25.4mm diameter +/-0.0762mm. Very resistant to most acids and alkalies. Excellent for liquid level float applications. Unpolished. Specific Gravity: 0.91.

Related Information:

There is also a good range of Balls - Plastic - Polypropylene on the Small Parts and Bearings website.


Castors - Bolt - Utility
Castors - Bolt - Utility


Swivel Castors for light duty applications including wire baskets, display equipment and light trolley applications.


There is also a good range of Castors - Bolt - Utility on the Small Parts and Bearings website.


Screws - Self Tapping - Countersunk - Philips - 304 Stainless
Screws - Self Tapping - Countersunk - Philips - 304 Stainless

Also see combined categories:
All Self Tapping Screws

Countersunk screws length includes head. ie, the full overall length of the screw.

There is also a good range of Screws - Self Tapping - Countersunk - Philips - 304 Stainless on the Small Parts and Bearings website.


Screws - Self Tapping - For Hard or Soft Plastics - Pan Head
Screws - Self Tapping - For Hard or Soft Plastics - Pan Head

Also see combined categories:
All Self Tapping Screws
All Self Tapping Screws for Plastics

Tri-Lobe Course Thread Plastic Threading Screws

Thread cutting screws for plastics. Be sure to select correct screw for hard or soft plastic threadcutting.

There is also a good range of Screws - Self Tapping - For Hard or Soft Plastics - Pan Head on the Small Parts and Bearings website.


Screws - Self Tapping - For Soft Plastics - Pan Head
Screws - Self Tapping - For Soft Plastics - Pan Head

Also see combined categories:
All Self Tapping Screws
All Self Tapping Screws for Plastics

Tri-Lobe Course Thread Plastic Threading Screws

Thread cutting screws for plastics. Be sure to select correct screw for hard or soft plastic threadcutting.

There is also a good range of Screws - Self Tapping - For Soft Plastics - Pan Head on the Small Parts and Bearings website.


Screws - Self Tapping - Pan Head - 302 - 304 Stainless
Screws - Self Tapping - Pan Head - 302 - 304 Stainless

Also see combined categories:
All Self Tapping Screws

Type AB Steel Self Tapping Screws.

Length is from the tip of the screw to the base of the head. Ie, does not include the head.

There is also a good range of Screws - Self Tapping - Pan Head - 302 - 304 Stainless on the Small Parts and Bearings website.


Screws - Self Tapping - Pan Head - Zinc Plated
Screws - Self Tapping - Pan Head - Zinc Plated

Also see combined categories:
All Self Tapping Screws

Type AB Steel Self Tapping Screws.

Length is from the tip of the screw to the base of the head. Ie, does not include the head.

There is also a good range of Screws - Self Tapping - Pan Head - Zinc Plated on the Small Parts and Bearings website.


Inserts - Self Tapping - For Aluminium - Stainless 303
Inserts - Self Tapping - For Aluminium - Stainless 303

Also see combined categories:
All Self Tapping Inserts

Threaded inserts are screwed into preformed or predrilled holes and cut their own threads into the wall of permanent installations.

Provides a strong wear and vibration resistant thread. Low volumes can be installed by winding in with a bolt through the threaded centre. Large volumes can be installed with hand installation tools (Sold Seperately). Hole sizes are reference only. Can variey on batchs. Optimum hole size is to be determinded through experimentation. A 60o countersink is required for flush mounting. Can be used in Aluminium, aluminium alloy or magnesium. Made from 303 stainless steel.

Related Information:

There is also a good range of Inserts - Self Tapping - For Aluminium - Stainless 303 on the Small Parts and Bearings website.


Inserts - Self Tapping - For Aluminium - Steel
Inserts - Self Tapping - For Aluminium - Steel

Also see combined categories:
All Self Tapping Inserts

Threaded inserts are screwed into preformed or predrilled holes and cut their own threads into the wall of permanent installations.

Provides a strong wear and vibration resistant thread. Low volumes can be installed by winding in with a bolt through the threaded centre. Large volumes can be installed with hand installation tools (Sold Seperately). Hole sizes are reference only. Can variey on batchs. Optimum hole size is to be determinded through experimentation. A 60o countersink is required for flush mounting. Can be used in Aluminium, aluminium alloy or magnesium. Made from steel with zinc chromate finish.

Related Information:

There is also a good range of Inserts - Self Tapping - For Aluminium - Steel on the Small Parts and Bearings website.


Inserts - Self Tapping - For Plastics - Stainless 303
Inserts - Self Tapping - For Plastics - Stainless 303

Also see combined categories:
All Self Tapping Inserts

Threaded inserts are screwed into preformed or predrilled holes and cut own threads into the wall of permanent installations.

Provides a strong wear and vibration resistant thread. Use of installation tool recommended. Low volumes can be installed by winding in with a bolt through the threaded centre. Large volumes can be installed with hand installation tools (Sold Seperately). Hole sizes are reference only. Can variey on batchs. Optimum hole size is to be determinded through experimentation. A 60o countersink is required for flush mounting. Use with plastics, light metal alloys or hard wood. Made from 303 stainless steel. Quantity orders can also be supplied in Brass or 316 Stainless.

Related Information:

There is also a good range of Inserts - Self Tapping - For Plastics - Stainless 303 on the Small Parts and Bearings website.


Inserts - Self Tapping - For Plastics - Steel
Inserts - Self Tapping - For Plastics - Steel

Also see combined categories:
All Self Tapping Inserts

Threaded inserts are screwed into preformed or predrilled holes and cut own threads into the wall of permanent installations.

Provides a strong wear and vibration resistant thread. Low volumes can be installed by winding in with a bolt through the threaded centre. Large volumes can be installed with hand installation tools (Sold Seperately). Hole sizes are reference only. Can variey on batchs. Optimum hole size is to be determinded through experimentation. A 60o countersink is required for flush mounting. Use with plastics, light metal alloys or hard wood. Made from steel with zinc chromate finish.

Related Information:

There is also a good range of Inserts - Self Tapping - For Plastics - Steel on the Small Parts and Bearings website.


Inserts - Self Tapping - For Wood - Hex Drive
Inserts - Self Tapping - For Wood - Hex Drive

Also see combined categories:
All Self Tapping Inserts
All Self Tapping Inserts for Wood

Threaded inserts are screwed into preformed or predrilled holes and cut own threads into the wall of permanent installations.

Die Cast Zinc Alloy. Knife thread cuts easily into a predrilled hole. Inexpensive inserts for use in ready to assemble furniture, drawer pulls etc. Installs with a hex wrench.

There is also a good range of Inserts - Self Tapping - For Wood - Hex Drive on the Small Parts and Bearings website.


Inserts - Self Tapping - For Wood - Hex Drive - Flanged
Inserts - Self Tapping - For Wood - Hex Drive - Flanged

Also see combined categories:
All Self Tapping Inserts
All Self Tapping Inserts for Wood

Threaded inserts are screwed into preformed or predrilled holes and cut own threads into the wall of permanent installations.

Die Cast Zinc Alloy. Knife thread cuts easily into a predrilled hole. Inexpensive inserts for use in ready to assemble furniture, drawer pulls etc. Installs with a hex wrench.

There is also a good range of Inserts - Self Tapping - For Wood - Hex Drive - Flanged on the Small Parts and Bearings website.


Rod - Round - Aluminium
Rod - Round - Aluminium

Also see combined categories:
All Metal Rod - Round

For general hobby applications.

NOTE! Very thin sizes may experience some bending. They may not be straight for the entire length. May be slightly oversized on OD so some reworking may be required before fitting closely mating parts such as bearings. For use with bearings we suggest you use items from the category - Shafting - Ground.

Related Information:

There is also a good range of Rod - Round - Aluminium on the Small Parts and Bearings website.


Rod - Round - Brass
Rod - Round - Brass

Also see combined categories:
All Metal Rod - Round

For general hobby applications.

NOTE! Very thin sizes may experience some bending. They may not be straight for the entire length. May be slightly oversized on OD so some reworking may be required before fitting closely mating parts such as bearings. For use with bearings we suggest you use items from the category - Shafting - Ground.

Related Information:

There is also a good range of Rod - Round - Brass on the Small Parts and Bearings website.


Balsa Wood - Dowel
Balsa Wood - Dowel


Round section dowel. Delivery Surcharges May Apply on Selected Items

This surcharge covers the protective packing required for shipping. Items over 1000mm long will require courier door to door delivery. Balsa sizes are approximate only. A $10.00 surcharge will apply to all orders of Balsa Wood delivered. Balsa Sheets, Block, Dowel, Leading Edge, Rectangle, Square.

Related Information:

There is also a good range of Balsa Wood - Dowel on the Small Parts and Bearings website.


Materials - Cloth - Carbon Fibre
Materials - Cloth - Carbon Fibre

Also see combined categories:
All Materials

Carbon Fibre Cloth

Standard delivery charge applies for this product.

Related Information:


Rod - Round - Stainless Steel
Rod - Round - Stainless Steel

Also see combined categories:
All Metal Rod - Round

For general hobby applications.

NOTE! Very thin sizes may experience some bending. They may not be straight for the entire length. May be slightly oversized on OD so some reworking may be required before fitting closely mating parts such as bearings. For use with bearings we suggest you use items from the category - Shafting - Ground.

Related Information:

There is also a good range of Rod - Round - Stainless Steel on the Small Parts and Bearings website.


Tube - Round - Soft Metal Packs
Tube - Round - Soft Metal Packs

Also see combined categories:
All Soft Metal Packs

For general hobby applications. This tube is annealed soft to make it easier to bend. Copper, brass and aluminium,

300mm lengths. Not recommended for heavy duty applications. For use with bearings we suggest you use items from the category - Shafting - Ground.

There is also a good range of Tube - Round - Soft Metal Packs on the Small Parts and Bearings website.


Wheels - Robotic - Motorised
Wheels - Robotic - Motorised

Also see combined categories:
All Wheels

Motorised wheels for robotic and other applications

See also tracks for robotic applications.

There is also a good range of Wheels - Robotic - Motorised on the Small Parts and Bearings website.


Castors - Plate - Utility
Castors - Plate - Utility

Also see combined categories:
All Plate Type Castors

Swivel and Rigid Castors for Light duty applications. Plate mounted type.


There is also a good range of Castors - Plate - Utility on the Small Parts and Bearings website.


Wheels - Hobby - General
Wheels - Hobby - General

Also see combined categories:
All Wheels

Includes wheels for robots and general hobby applications

Also see tracks for Robotic applications.

Related Information:

There is also a good range of Wheels - Hobby - General on the Small Parts and Bearings website.


Rod - Round - Soft Metal Packs
Rod - Round - Soft Metal Packs

Also see combined categories:
All Soft Metal Packs

For general hobby applications. This rod is annealed soft to make it easier to bend. Copper, brass and aluminium,

300mm lengths. Not recommended for heavy duty applications. For use with bearings we suggest you use items from the category - Shafting - Ground.

There is also a good range of Rod - Round - Soft Metal Packs on the Small Parts and Bearings website.


Sheet - Aluminium - T1100
Sheet - Aluminium - T1100

Also see combined categories:
All Sheet
All Aluminium Sheet

Non precision inexpensive aluminium sheet for hobby applications. Heat-treated T1100 grade.

Sheet for applications not requiring absolute precision. Thickness tolerances +/- 0.1mm. Lengths and widths will be at least that specified but may be more.

There is also a good range of Sheet - Aluminium - T1100 on the Small Parts and Bearings website.


Sheet - Aluminium - T7075
Sheet - Aluminium - T7075

Also see combined categories:
All Sheet
All Aluminium Sheet

Non precision inexpensive aluminium sheet for hobby applications. Heat-treated T7075 grade.

Sheet for applications not requiring absolute precision. Thickness tolerances +/- 0.1mm. Lengths and widths will be at least that specified but may be more.

There is also a good range of Sheet - Aluminium - T7075 on the Small Parts and Bearings website.


Sheet - Carbon Fibre
Sheet - Carbon Fibre

Also see combined categories:
All Sheet
All Non Metallic Sheet

3K Solid Sheet

Standard delivery charge applies for this product.

There is also a good range of Sheet - Carbon Fibre on the Small Parts and Bearings website.


Tube - Round - Aluminium
Tube - Round - Aluminium

Also see combined categories:
All Metal Tube - Round

Hollow round tubing for general hobby applications.

For general hobby applications. May be slightly oversized on OD so some reworking may be required before fitting closely mating parts such as bearings. For use with bearings we suggest you use items from the category - Shafting - Ground. Many sizes fit neatly into larger sizes to allow for telescoping size applications. Some items may be available in longer or shorter lengths. e-mail sales@smallparts.com.au with enquiries.

Related Information:

There is also a good range of Tube - Round - Aluminium on the Small Parts and Bearings website.


Tube - Round - Brass
Tube - Round - Brass

Also see combined categories:
All Metal Tube - Round

Hollow round tubing for general hobby applications.

For general hobby applications. May be slightly oversized on OD so some reworking may be required before fitting closely mating parts such as bearings. For use with bearings we suggest you use items from the category - Shafting - Ground. Many sizes fit neatly into larger sizes to allow for telescoping size applications. Some items may be available in longer or shorter lengths. e-mail sales@smallparts.com.au with enquiries.

Related Information:

There is also a good range of Tube - Round - Brass on the Small Parts and Bearings website.


Tube - Round - Copper
Tube - Round - Copper

Also see combined categories:
All Metal Tube - Round

Hollow round tubing for general hobby applications.

For general hobby applications. May be slightly oversized on OD so some reworking may be required before fitting closely mating parts such as bearings. For use with bearings we suggest you use items from the category - Shafting - Ground. Many sizes fit neatly into larger sizes to allow for telescoping size applications. Some items may be available in longer or shorter lengths. e-mail sales@smallparts.com.au with enquiries.

Related Information:

There is also a good range of Tube - Round - Copper on the Small Parts and Bearings website.


Tube - Square - Aluminium
Tube - Square - Aluminium

Also see combined categories:
All Metal Tube - Square

Hollow square tubing for general hobby applications.

Some items may be available in longer or shorter lengths. e-mail sales@smallparts.com.au with enquiries.

Related Information:

There is also a good range of Tube - Square - Aluminium on the Small Parts and Bearings website.


Tube - Square - Brass
Tube - Square - Brass

Also see combined categories:
All Metal Tube - Square

Hollow square tubing for general hobby applications.

Some items may be available in longer or shorter lengths. e-mail sales@smallparts.com.au with enquiries.

Related Information:

There is also a good range of Tube - Square - Brass on the Small Parts and Bearings website.


Tube - Round - Stainless Steel
Tube - Round - Stainless Steel

Also see combined categories:
All Metal Tube - Round

Hollow round tubing for general hobby applications.

For general hobby applications. May be slightly oversized on OD so some reworking may be required before fitting closely mating parts such as bearings. For use with bearings we suggest you use items from the category - Shafting - Ground.

Related Information:

There is also a good range of Tube - Round - Stainless Steel on the Small Parts and Bearings website.


Servo Motor - Brackets
Servo Motor - Brackets

Also see combined categories:
All Servo Accessories

Brackets to suit servo motors for robotic applications



Balsa Wood - Block
Balsa Wood - Block


Rectangular and square section short lengths. Delivery Surcharges May Apply on Selected Items

This surcharge covers the protective packing required for shipping. Items over 1000mm long will require courier door to door delivery. Balsa sizes are approximate only. A $10.00 surcharge will apply to all orders of Balsa Wood delivered. Balsa Sheets, Block, Dowel, Leading Edge, Rectangle, Square.

There is also a good range of Balsa Wood - Block on the Small Parts and Bearings website.


Balsa Wood - Leading Edge
Balsa Wood - Leading Edge


Leading edge for aircraft use. Delivery Surcharges May Apply on Selected Items

This surcharge covers the protective packing required for shipping. Items over 1000mm long will require courier door to door delivery. Balsa sizes are approximate only. A $10.00 surcharge will apply to all orders of Balsa Wood delivered. Balsa Sheets, Block, Dowel, Leading Edge, Rectangle, Square.

Related Information:

There is also a good range of Balsa Wood - Leading Edge on the Small Parts and Bearings website.


Balsa Wood - Trailing Edge
Balsa Wood - Trailing Edge


Trailing edge for aircraft use. Delivery Surcharges May Apply on Selected Items

This surcharge covers the protective packing required for shipping. Items over 1000mm long will require courier door to door delivery. Balsa sizes are approximate only. A $10.00 surcharge will apply to all orders of Balsa Wood delivered. Balsa Sheets, Block, Dowel, Leading Edge, Rectangle, Square.

Related Information:

There is also a good range of Balsa Wood - Trailing Edge on the Small Parts and Bearings website.


Bearings - Ball - High Speed Cage
Bearings - Ball - High Speed Cage

Also see combined categories:
All Radial Ball Bearings

Bearings with cages for high speed applications, including phenolic, nylon and polyamide.

Bearings in this listing have various types of high speed cages. Speed ratings range from 20 percent to 80 percent increase on standard cage types. Please contact us for a data sheet on the specific size you require. Items with high speed cages have the suffixes T9H, TNH, TW or KC. This category does not include ceramic hybrid bearings with high speed cages. These are listed under Bearings - Ceramic Hybrid.

Related Information:

There is also a good range of Bearings - Ball - High Speed Cage on the Small Parts and Bearings website.


Connectors - Edge - Kite
Connectors - Edge - Kite


Edge connectors for kite rods and tubes. Can be used for other applications requiring an angled join of rod or tubing. Not a precision item.

Joiners and connectors suitable for rod and tubing as well as for kites.

There is also a good range of Connectors - Edge - Kite on the Small Parts and Bearings website.


Grommets - Rubber - Natural - Closed
Grommets - Rubber - Natural - Closed

Also see combined categories:
All Closed Rubber Grommets
All Rubber Grommets

Closed Natural Rubber Grommets

50 +/-5 Durometer. Dustproof with Approx 0.5mm thick Membrane. Easy to Install. Dust protection.

Related Information:

There is also a good range of Grommets - Rubber - Natural - Closed on the Small Parts and Bearings website.


Bungs - Rectangular
Bungs - Rectangular


Plastic bungs fit inside rectangular tube.

Other colours available on request. Minimum quantities will apply. Made from tough polyethylene.

Related Information:

There is also a good range of Bungs - Rectangular on the Small Parts and Bearings website.


Bungs - Round
Bungs - Round


Plastic bungs fit inside round tube.

Other colours available on request. Minimum quantities will apply. Made from tough polyethylene.

Related Information:

There is also a good range of Bungs - Round on the Small Parts and Bearings website.


Main Pages



Freight Rates
Terms and Conditions
Privacy Policy

Registered Australian Company: Hobby & Engineering Supplies Pty Ltd (ABN 54 125 001 541)

Hobby and Engineering Supplies offers 6173 products in 447 categories including assortment kits, low priced hobby bearings, tools, screws, brass and aluminium rod and tubing - see the full listing in the Online Catalogue. We have excellent Freight Rates within Australia and worldwide. We offer a choice of delivery with a signature required, or cheaper options with no signature required. The no signature required options are at the customer’s risk once the goods leave our store.

Using the links throughout this site you will find extensive information including catalogues, technical data, and other product specific information. We sell our products worldwide through our online store and our overseas freight rates are competitive for fully traceable courier delivery.

Hobby and Engineering Supplies is part of MBA Group offering a select range from the MBA Group catalogue.

Hobby and Engineering Supplies products are not authorised for sale into the USA or Canada due to the reluctance of Australian insurers to provide product liability insurance into those two countries.

Information on this website is Copyright Hobby and Engineering Supplies 1997. All rights reserved.

Freight Rates
Terms and Conditions
Privacy Policy

Registered Australian Company: Hobby & Engineering Supplies Pty Ltd (ABN 54 125 001 541)

Hobby and Engineering Supplies offers 6173 products in 447 categories including assortment kits, low priced hobby bearings, tools, screws, brass and aluminium rod and tubing - see the full listing in the Online Catalogue. We have excellent Freight Rates within Australia and worldwide. We offer a choice of delivery with a signature required, or cheaper options with no signature required. The no signature required options are at the customer’s risk once the goods leave our store.

Using the links throughout this site you will find extensive information including catalogues, technical data, and other product specific information. We sell our products worldwide through our online store and our overseas freight rates are competitive for fully traceable courier delivery.

Hobby and Engineering Supplies is part of MBA Group offering a select range from the MBA Group catalogue.

Hobby and Engineering Supplies products are not authorised for sale into the USA or Canada due to the reluctance of Australian insurers to provide product liability insurance into those two countries.

Information on this website is Copyright Hobby and Engineering Supplies 1997. All rights reserved.