SS Countersunk Locking Bolt
Stainless Steel bicycle SS Countersunk Locking Bolt - Axles & Pivots
304 Stainless Steel locking pivot bolt Cold-headed + heat-treated + ED coated. Built for OEM bicycle assembly with traceable material and consistent quality.
01 Dimensions & Tolerances
Core dimensions are controlled for repeatable bicycle frame assembly. Custom dimensions, tolerances, and surface finish can be supplied from drawing.
| Parameter | Specification |
|---|---|
| Thread Size | M10×1.0 |
| Thread Accuracy | 6H (ISO 965-2) |
| Thread Direction | Right-hand |
| Hex Drive Size | 6 mm |
| Overall Length | 65mm |
| Tolerance Grade | ±0.03 mm (smooth shafth7) |
02 Material & Performance
Material selection is optimized for the target bicycle application with verified mechanical properties and corrosion resistance.
| Parameter | Specification |
|---|---|
| Primary Material | 10B38 carbon steel |
| Material Grade / Class | A2-70 |
| Applicable Standards | ASTM A29 / ISO 898-1 |
| Tensile Strength | 1040 MPa |
| Yield Strength | 940 MPa |
| Shear Strength | 620 MPa |
| Hardness | HRC 32-39 |
| Density | 7.85 g/cm³ |
| Process | Cold-headed + heat-treated + ED coated |
| Surface Finish | ED Black |
03 Application & Compatibility
Designed for bicycle OEMs, assembly factories, and component brands that need repeatable supply with documented QC.
| Parameter | Specification |
|---|---|
| Frame Type | Enduro and DH full-suspension mountain bikes |
| Typical Position | four-bar suspension main pivot |
| Accessory / Mating Part | main-link bearing pivot |
| Environment | drawing-specific requirement |
| Compatible Standards | ISO 898-1 / ISO 965-2 |
| Load Rating | drawing-specific requirement |
| Recommended Torque | 22-28 N·m |
| Maximum Torque | 38 N·m |
| Installation Method | double-sided locknut style, tightened from both sides |
| Recommended Tool | 6 mm hex keys on both sides and torque wrench |
| Thread Locker | Loctite 243 medium-strength blue threadlocker |
| Installation Position | full-suspension frame main pivot |
Installation Steps
04 Quality Assurance
Each production batch can be supplied with traceability records, inspection data, and packaging labels for OEM receiving control. SGS/TUV third-party test reports available on request.
| Test / Inspection | Standard & Criteria |
|---|---|
| Salt Spray Test | 240 hours ISO 9227 NSS, e-coating |
| Torque Verification | ISO 16047 |
| Hardness Testing | ASTM E18 Rockwell HRC |
| Thread Inspection | ISO 965-2 GO/NO-GO gauge inspection |
| Dimensional Inspection | 100% inspection |
05 Packaging & Ordering
Standard bulk packaging is available for assembly lines. Custom labels, kitting, and retail packaging can be prepared for brand programs.
| Parameter | Specification |
|---|---|
| Standard Pack | 500 pcs/bag |
| Packaging Material | PE resealable bag + corrugated carton |
| Industry Batch Reference | 1,000 pcs/specification for standard parts / 500 pcs/specification for other items |
| Batch Pricing Model | tiered volume pricing with no mandatory MOQ |
| Required Quote Data | Size, material, finish, quantity, drawing if custom |
Send your drawing, sample, or BOM and our team will confirm material, thread fit, finish, packaging, and lead time.
Technical Inquiry
Send drawings or STEP files. Engineering response within 24 hours.
Send DrawingRequest Quotation
Specify quantity, material, finish, and packaging. Quotes in 24 hours.
Get QuoteTrial Order
Start with a small batch to validate fit, finish, and assembly workflow.
Order Samples