As a sourcing professional, I bring you the 5/8-11 socket head cap screw designed for rugged, repeatable performance in demanding assemblies. Our stock is built for Custom projects and adaptable to Factories' production lines, giving you reliable supply without bottlenecks. I source from certified manufacturers and offer choices in material (high-strength alloy steel, stainless), heat treatment, and surface finish (black oxide, zinc plating) to meet your exact torque and corrosion needs. Custom lengths and head styles are available to match your application, and we can scale for large Factories' runs with consistent quality and on-time delivery. You can count on tight tolerances, clear technical data sheets, and batch traceability. If you're coordinating multi-site production, I can consolidate orders, help with packaging, and support your quality gates. Let me know your specs, and I'll tailor the 5/8-11 socket head cap screw solution to your process.
5/8-11 socket head cap screws are a staple for high-torque assemblies in machinery and automotive equipment. This year’s focus is on unmatched quality through stricter material specs and superior heat treatment. Available in high-strength alloy steels and stainless grades, they deliver tight tolerances, hard surfaces, and excellent wear resistance, with finishes like black oxide or zinc plating that protect in harsh environments while UNC threads ensure reliable mating. Global buyers gain from consistent supply and traceability. Reputable producers provide material certificates, in-process checks, and final inspections, plus scalable production to meet demand. Custom options cover length, material, coatings, and packaging that fits regional requirements, backed by QA, on-time delivery, and responsive technical support for projects that stay on schedule.
| Length (in) | Thread Size | Material | Finish | Tensile Strength (ksi) | Hardness (HRC) | Grade | Standard | Application |
|---|---|---|---|---|---|---|---|---|
| 1.00 | 5/8-11 UNC | Alloy Steel (AISI 4140) | Zinc Plated | 180 | 34 | 8.8 | ASME B18.3.3 | Heavy machinery assemblies |
| 1.50 | 5/8-11 UNC | Stainless Steel 304 (A2-70) | Passivated | 70 | 15 | 18-8 | ASME B18.3.3 | General-purpose fastening |
| 2.00 | 5/8-11 UNC | Stainless Steel 316 | Passivated | 78 | 16 | 18-8 | ASME B18.3.3 | Marine-grade fastenings |
| 3.00 | 5/8-11 UNC | Alloy Steel (AISI 4140) | Black Oxide | 180 | 34 | 8.8 | ASME B18.3.3 | Heavy-duty automotive |
| 4.50 | 5/8-11 UNC | Alloy Steel (AISI 8740) | Black Oxide | 196 | 46 | 12.9 | ASME B18.3.3 | High-strength assemblies |
| 5.50 | 5/8-11 UNC | Stainless Steel 416 | Satin | 100 | 25 | 18-8 | ASME B18.3.3 | Cosmetic/low-friction surfaces |
| 6.00 | 5/8-11 UNC | Stainless Steel 304 | Passivated | 74 | 17 | 18-8 | ASME B18.3.3 | General-purpose fastening |