Fastener — SS Fasteners

SS Hex Bolts — Metric (A2 / A4)

Stainless steel hex bolts (hexagon head cap screws) manufactured in A2 (SS 304) and A4 (SS 316 molybdenum-alloyed) grades for applications demanding long-term corrosion resistance — marine hardware, chemical-processing plant, food-grade equipment, and coastal or humid-climate structural work. Supplied in property classes A2-70/A4-70 (minimum tensile strength 700 N/mm² per ISO 3506-1) for standard structural loads, and A2-50/A4-50 for the larger diameters where cold-forming to the 70 class isn't feasible. Manufactured across the full M6 to M64 metric range to DIN 931 (partial thread), DIN 933 (full thread), DIN 601, DIN 558, DIN 960/DIN 961 (fine pitch), DIN 7990, ISO 4014, ISO 4015, ISO 4016 and ISO 4017 — full and partial thread, standard and fine pitch. Standard passivated finish per ASTM A380 reinforces the native chromium-oxide layer for maximum corrosion resistance. Custom lengths, non-standard threads, and small-batch runs manufactured to your drawing. Manufactured, stocked and distributed from Chennai since 1969.