Property Class 8.8 Steel Bicycle Spoke Nipples are supplied to ISO 898-1 property class 8.8. Corrosion behaviour is requires plating (zinc) for corrosion protection, the material is magnetic, and the usable service range is commonly limited to approx. +300 °C; confirm against the coating and the load. In practice this grade is the workhorse medium-carbon alloy class for structural joints.
- Grade
- ISO 898-1 property class 8.8
- Corrosion resistance
- Requires plating (zinc) for corrosion protection
- Magnetic response
- Magnetic
- Service temperature
- commonly limited to approx. +300 °C; confirm against the coating and the load
Property values are typical for the grade. Certified mechanical test data is available on request for production orders.
Property Class 8.8 Steel Bicycle Spoke Nipples are supplied to our own published dimensions — this is a trade-series article rather than one covered by a dimensional standard, so confirm the figures against the part you are replacing. The grade provides requires plating (zinc) for corrosion protection and is magnetic; the practical service range is commonly limited to approx. +300 °C; confirm against the coating and the load.
Why Choose Property Class 8.8 Steel for Bicycle Spoke Nipples
The workhorse medium-carbon alloy class for structural joints. For bicycle spoke nipples, this matters when requires plating (zinc) for corrosion protection is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 898-1 property class 8.8 |
|---|
| Magnetic response | Magnetic |
|---|
| Service temperature | commonly limited to approx. +300 °C; confirm against the coating and the load |
|---|
| Corrosion characteristic | Requires plating (zinc) for corrosion protection |
|---|
Galvanic & Galling Considerations
For bicycle spoke nipples in steel, the dominant compatibility issue is hydrogen embrittlement at high property classes (10.9 and above) when electroplated. Plating must be followed by an appropriate baking treatment, or a non-electroplated finish (mechanical zinc, zinc flake) should be substituted.
Comparable Grades
For Bicycle Spoke Nipples, class 10.9 or 12.9 is the comparable strength step. Move up when the joint preload approaches the proof load of the current class; move down when the joint is over-specified. For corrosion-critical service, switch to stainless A2 or A4.
Sizes of Bicycle Spoke Nipples Available in Property Class 8.8 Steel
| Form | Length options (mm) | Spoke thread families | Thread lock | Color options |
|---|
| Standard A | 12 / 14 / 14.5 / 16 | 1.8 / FG 2.0; 2.0 / FG 2.3; 2.34 / FG 2.6 | with or without thread-lock compound | black / blue / gold / green / purple / red / silver / turquoise |
| Standard B | 12 / 14 / 14.5 / 16 | 1.8 / FG 2.0; 2.0 / FG 2.3; 2.34 / FG 2.6 | with or without thread-lock compound | black / blue / gold / green / purple / red / silver / turquoise |
Dimensions are independent of the material: the table above lists the sizes supplied, and on this page every one of them is quoted in Property Class 8.8 Steel. The catalogue's default material column has been omitted here so it cannot be read as contradicting that.
Custom manufacturing · Made to drawing
Need this screw in a grade that is not listed?
Grade 8 8 Steel is one of the grades the catalog describes. Lengths and thread lengths outside the standard table are the commonest request, followed by a drive the standard does not offer and a head marked with your own part number. Made by cold heading or warm forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
Custom screw manufacturingSend a drawing
Applications & Industries
Where Bicycle Spoke Nipples are used, and what decides the specification in each case. Stocked from Standard A to Standard B (nominal diameter).
Industries that specify Bicycle Spoke Nipples
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Wheel building
Spoke nipples tension and retain spokes at the rim.
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E-bike service
Brass nipples are preferred in the supplied guidance for higher service duty.
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Performance wheels
Aluminum colors and thread-lock options support the wheel specification.
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Bicycle repair
Length and spoke-thread family must match the spoke.
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Steel fabrication
Bolted connections in frames, enclosures, walkways and weldments, on the bench and on site.
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Energy & infrastructure
Tower, pipework, switchgear and plant fixings specified for long service life and inspectable joints.
Typical applications
- tensioning a spoke through a compatible nipple thread
- choosing 12–16 mm length for the rim and spoke
- selecting aluminum for weight or brass for e-bike duty
- using the supplied thread-lock and color options
- clamping two machined faces to a calculated preload
- bolting brackets, motors and gearboxes to a frame
Service conditions to specify against
- Marine and coastal
- Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
- High load
- Supplied in ISO 898-1 property classes, so the joint can be designed to a stated proof load and tightened to a calculated torque rather than by feel.
- Vibration
- Specified where cyclic load would loosen a plain nut or screw — rotating plant, rail, mobile equipment and anything that is not re-torqued in service.
- Torque and preload
- The joint is designed around bolt tension, so lubrication, coating and the friction coefficient all change the torque figure — state them together.
Where to use something else
- Do not mix spoke thread families; a nipple that starts on the spoke can still have the wrong thread engagement.
- Do not use a machine thread into unthreaded sheet or timber; use a tapping screw, rivet nut or insert made for that parent material.
Full application guide: where Bicycle Spoke Nipples are used, how to specify them, and the cases they are wrong for
