A2 Stainless Allen Key Countersunk Screws | Duchy Fasteners

Manufactured from A2 stainless steel (304), these countersunk socket machine screws deliver excellent corrosion resistance and long-lasting durability for demanding environments. Designed to DIN 7991 standards, they provide consistent dimensional accuracy and dependable performance across industrial, engineering, construction, and mechanical assembly applications.

The countersunk (CSK) head sits flush with the material surface for a clean, professional finish, while the internal hex (Allen key) drive supports secure, high-torque installation with reduced risk of cam-out. Precision engineering ensures a reliable fit, strong clamping force, and repeatable results—ideal for equipment build, maintenance, and fabrication work where quality matters.