AISI 4340

Resitant Metal Alloys Fasteners is a manufacturer and supplier of AISI 4340 Fasteners such as bolts, screws, stud bolts, threaded rods, nuts, washers and other bolting components. AISI 4340 is a chromium-molybdenum alloy steel with high strength properties, used for manufacturing wide range of fasteners across ASTM and ISO bolting standards.

AISI 4340 alloy steel fasteners are manufactured using as rolled bar stock followed by quench and tempering to achieve full grade strength as required to A320 L43, F568 Grade Class 12.9 & ISO 898 specifications.