Button Head Socket Cap Screw
304 Stainless Steel bicycle Button Head Socket Cap Screw - Screws & Bolts
304 Stainless Steel bolt / screw Cold-headed & thread-rolled. 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 | M5 × 0.8 |
| Thread Accuracy | 6g (ISO 965-2) |
| Thread Direction | Right-hand |
| Head Diameter | 10.5 mm |
| Head Height | 2.8 mm |
| Screw Length | 12-20 mm, multiple specifications |
| Hex Drive Size | 4 mm |
| Overall Height | 14.8-22.8 mm |
| Tolerance Grade | ±0.05 mm |
| Finish Tolerance | critical fit dimensions h7 (0/-0.018mm)/ non-fit dimensions +/-0.05mm |
02 Material & Performance
Material selection is optimized for the target bicycle application with verified mechanical properties and corrosion resistance.
| Parameter | Specification |
|---|---|
| Primary Material | 304 stainless steel (AISI 304) |
| Material Grade / Class | A2-70 (ISO 3506-1) |
| Applicable Standards | ISO 3506-1 (A2-70)/ ASTM A276 |
| Tensile Strength | 700 MPa |
| Yield Strength | 450 MPa |
| Shear Strength | 420 MPa |
| Hardness | HRB 88-95 |
| Density | 7.93 g/cm³ |
| Process | Cold-headed & thread-rolled |
| Surface Finish | Pickled & Passivated (Standard) / drawing-specified option |
03 Application & Compatibility
Designed for bicycle OEMs, assembly factories, and component brands that need repeatable supply with documented QC.
| Parameter | Specification |
|---|---|
| Frame Type | road bike, project-specific frame, folding bike, commuter bike |
| Typical Position | down tube bottle cage, project-specific bottle cage, front fork fender project-specific |
| Accessory / Mating Part | bottle cage, fender, project-specific, small light |
| Environment | indoor and outdoor use, project-specific |
| Compatible Standards | ISO 68-1 / ISO 965-2 / DIN 7380 |
| Load Rating | standard |
| Recommended Torque | 3.5-5 N·m |
| Maximum Torque | 7 N·m |
| Installation Method | threaded connection |
| Recommended Tool | 4 mm hex key / TX-25 Torx key |
| Thread Locker | Loctite 243 medium-strength blue threadlocker |
| Installation Position | bottle cage project-specific, fender installation project-specific, accessory mounting point |
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 | 96 hours ASTM B117 pickled and passivated; 120 hours ASTM B922 electropolished |
| Torque Verification | ISO 16047 |
| Hardness Testing | ASTM E18 Rockwell HRB |
| Thread Inspection | ISO 965-2 GO/NO-GO gauge inspection |
| Dimensional Inspection | AQL 4.0 sampling 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