I’m a China-based manufacturer specializing in high-quality fasteners, and I’m here to help your production line run smoother with cap socket head bolts. I source only premium steel and use precise heat treatment to ensure excellent clamping force and fatigue resistance. From my factory, the cap socket head bolt comes in both imperial and metric sizes, with finishes like zinc-plated, black oxide, or stainless options. I can customize length, head drive, and thread pitch to match your equipment tightening needs. For B2B buyers, I offer flexible MOQ, prompt shipping, and OEM labeling to fit your brand. My team ensures consistent quality through strict inspections and traceable lot numbers. If you’re sourcing in China or seeking a reliable manufacturer partner, I’m ready to collaborate quickly. Cap socket head bolt reliability, fast delivery, and competitive pricing—these are what you get when you choose us.
A cap socket head bolt is engineered to deliver high strength-per-size, precise tolerances, and clean aesthetics. Its slender, cylindrically shaped head sits flush after installation, enabling compact assemblies in automotive, aerospace, electronics, and machinery. Using heat-treated alloy steel or stainless steel, with finishes such as zinc plating, black oxide, or corrosion-resistant coatings, these fasteners resist wear and corrosion under demanding service. Precision machining ensures consistent head dimensions and smooth drive engagement, enabling predictable torque and reliable clamping. For global buyers, selecting a supplier with certified products, traceability, and stable lead times is essential. Reputable manufacturers align with international standards such as DIN, ISO, and ANSI, and provide QA data, material specs, and packaging for diverse markets. A strong supply chain minimizes risk of defects and counterfeit parts, preserving design intent from prototype to production. When evaluating options, prioritize consistent supply, rigorous testing, clear technical data, and transparent total cost of ownership across global operations.
| Size (Diameter x Length) | Material | Finish | Grade | Standards | Tensile Strength (MPa) | Yield Strength (MPa) | Hardness (HRC) |
|---|---|---|---|---|---|---|---|
| M6x20 | Alloy Steel | Black Oxide | 8.8 | DIN 912 / ISO 4762 | 800 | 640 | 36-39 |
| M8x25 | Alloy Steel | Black Oxide | 8.8 | DIN 912 / ISO 4762 | 830 | 640 | 36-39 |
| M10x30 | Alloy Steel | Zinc Plated | 10.9 | DIN 912 / ISO 4762 | 1040 | 940 | 38-46 |
| M6x35 | Stainless Steel | Satin / Passivated | A2-70 | ISO 4762 | 700 | 350 | 30-34 |
| M12x40 | Alloy Steel | Black Oxide | 12.9 | DIN EN ISO 4762 | 1220 | 1080 | 40-50 |
| M4x12 | Stainless Steel | Passivated | A2-70 | ISO 4762 | 700 | 350 | 28-32 |