JLHY's socket head cap screws are precision high-strength fasteners designed for applications where a compact profile and maximum torque transmission are both required. The cylindrical socket head sits proud of the surface with a large, smooth bearing area, while the hex socket drive delivers torque without any risk of cam-out — even at the highest tightening forces. Manufactured from 10.9 or 12.9 grade heat-treated alloy steel, these screws achieve tensile strengths from 1040 MPa to over 1220 MPa.

Socket head cap screws are the standard choice in machine building, hydraulic systems, robotics, aerospace tooling, and any application where components must be securely fastened in limited spaces. The precision shoulder of the socket head cap screw provides accurate alignment and a defined bearing surface, while the socket drive enables controlled tightening to specific torque values.

JLHY produces socket head cap screws to DIN 912 / ISO 4762 standards with threads from M3 to M42. Thread fit is available in 6g standard tolerance or 6h close fit for precision applications. For high fatigue applications, we offer ground thread variants with enhanced surface finish and fatigue life. Our quality system includes 100% geometric inspection on critical dimensions.

We recommend using matching grade nuts and hardened washers to achieve the full joint rating. JLHY supplies socket head cap screws to equipment manufacturers, automation firms, and precision engineering companies globally. Contact our technical sales team for specifications, torque data, and volume pricing.