From my workshop to your supply chain, I bring you the Flat Head Hex Socket Cap Screws Bolts you need for precision assembly. As an ODM partner and a dedicated Factory, I tailor materials, finishes, and threading to match your project specs. I understand quality and repeatable performance matter for OEMs who demand reliable torque and corrosion resistance. Our screws come in stainless steel, alloy steel, and heat-treated variants, with options for thread size, length, and drive countersink geometry. I offer short lead times, tight tolerances, and in-house sampling to speed up NPI. I provide competitive pricing for high-volume orders and can support private labeling or co-branding if necessary. Communication is clear, shipping is prompt, and I stand behind every batch with a warranty. If your design needs a specific head countersink or anti-seize finish, I can customize through ODM collaboration to fit your production line. Tell me your specs and I’ll draft a procurement plan.
Flat head hex socket cap screws, or countersunk Allen bolts, are a trusted choice for pros in machinery, electronics, and automotive work. Precision machined from high-grade alloy or stainless steel, they are heat-treated for strength and use a robust hex drive to minimize cam-out. The countersunk head creates a flush, clean surface on panels and housings, while finishes such as zinc plating or black oxide offer corrosion resistance. With both metric and inch sizes and tight tolerances, they fit a wide range of specifications and environments. Based in a major sourcing hub in Dongguan, this region supports global buyers with scalable production, reliable lead times, and consistent quality. Look for suppliers with a formal quality management system, traceability, and documented inspections covering materials, heat treatment, and dimensions. Flexible MOQs, packaging options for international logistics, and responsive technical support reduce risk in cross-border projects. Partnering with a capable supplier ensures dependable performance under demanding conditions.
| Size | Length | Head Type | Material | Finish | Thread | Tensile Strength (MPa) | Standard | Part Code |
|---|---|---|---|---|---|---|---|---|
| M3 x 0.5 | 8 mm | Flat Countersunk | A2 Stainless Steel | Satin | 0.50 | 520 | DIN 7991 | M3-0.5-008-A2S |
| M4 x 0.7 | 10 mm | Flat Countersunk | A2 Stainless Steel | Zinc Plated | 0.70 | 520 | DIN 7991 | M4-0.7-010-A2Z |
| M5 x 0.8 | 12 mm | Flat Countersunk | A4 (316) Stainless | Satin | 0.80 | 800 | DIN 7991 | M5-0.8-012-A4S |
| M6 x 1.0 | 20 mm | Flat Countersunk | 12.9 Alloy Steel | Black Oxide | 1.00 | 900 | DIN 7991 | M6-1.0-020-AL12BO |
| M8 x 1.25 | 25 mm | Flat Countersunk | 316 Stainless | Satin | 1.25 | 860 | DIN 7991 | M8-1.25-025-316S |
| M10 x 1.5 | 30 mm | Flat Countersunk | A2 Stainless | Zinc Plated | 1.50 | 520 | DIN 7991 | M10-1.5-030-A2Z |
| 1/4-20 x 1" | 1.0 in | Flat Countersunk | 18-8 Stainless | Plain | 20 TPI | 750 | UNC | 1/4-20-100-SS |
| 5/16-18 x 1.5" | 1.5 in | Flat Countersunk | Alloy Steel | Black Oxide | 18 TPI | 900 | UNC | 5/16-18-150-ALBO |