Button Head Socket Cap Screw
Radially curved bearing surface reduces surface damage on soft materials (e.g., carbon fiber, aluminum）
Head height tolerance: ±0.25mm (e.g., M6 head height: 4.0mm vs. DIN 912’s 6.0mm)
Enhanced Drive IntegrityDeeper hex socket (≥1.5×shank diameter vs. DIN 912’s ≥0.8d) prevents stripping at high torque
Drive size compliance: ISO 10664 (tolerance ±0.03mm)
Performance-Tailored MaterialsGrade 12.9 alloy steel (≥1,220 MPa tensile strength)
Corrosion options: Black oxide (120h salt spray), A4 stainless steel (500h+)
|
Parameter |
Technical Data |
|
Standard |
ISO 7380:2011 (Equivalent to DIN 7991, GB/T 70.3, ASME B18.3.5M) |
|
Head Type |
Button Head (Half-Round Head with Large Radius) |
|
Strength Grade |
Class 12.9 (Options: 10.9 / 8.8 available upon request) |
|
Material |
Alloy Steel (SCM435/40Cr), Oil-Quenched & Tempered |
|
Hardness |
39-44 HRC / HV 435-530 (Controlled per EN ISO 898-1) |
|
Tensile Strength |
≥1,220 MPa (Tested per ISO 898-1) |
|
Yield Strength |
≥1,100 MPa (Proof load at 0.0048d) |
|
Thread Pitch |
Standard Metric Coarse Thread (Fine thread customizable) |
|
Drive Type |
Hex Socket (Allen Key) - ISO 10664 compliant (Size tolerance: ±0.03mm) |
Key Applications
Technical Superiority in Critical Applications
Aerospace: Reduced head height saves weight in turbine assemblies
Automotive: Curved head prevents thread galling in aluminum engine blocks
Medical: Passivated stainless steel meets ISO 13485 biocompatibility
Precision Engineering: Head-to-shank transition radius ≥0.1d (vs. DIN’s ≥0.08d) reduces stress concentration
SERIVCE
Reliable After-Sales Support:Swift resolution for all technical issues & product inquiries. / 20+ Years of Global Export Expertise:Proven experience in international logistics & compliance.
Detailed Product Specifications On Request:Customizable spec sheets for informed purchasing decisions. / Instant Quote Response:Submit inquiries for prompt pricing & solution proposals.
Certified Export Documentation & Timely Shipment:Hassle-free logistics with professionally prepared export papers.
Custom Packaging with Pre-Shipment Visual Verification:Branded/secure packaging with photo confirmation before dispatch.
Premium Quality at Competitive Pricing: Industry-leading products optimized for value & performance.
