Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Black-Oxide Steel Size_M22 A bright CR+3 zinc-plated finish

A bright CR+3 zinc-plated finish followed by a hydrogen-relief bake delivers RoHS-compliant corrosion protection

ensuring your project’s success

Apply Anti-Seize Lubricant: Prevents galling and ensures smooth tightening of stainless steel fasteners

3125″) Thread Size 5/16-18 UNC (Coarse Thread) Drive Size 1/4″ Hex Head Type Socket Head Cap Screw (SHCS) Material Alloy Steel Finish Thermal Black Oxide Standards ASME B18

Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Black-Oxide Steel Size_M22 A bright CR+3 zinc-plated finishMonster Overview: Need full thread grip yet a perfectly flush head in ultra thin sheet metal or shallow countersinks? Our #4 40 Phillips Flat Undercut Thread Cutting Screws trim away most of the 82 cone, giving you maximum thread engagement without head rise. Heat treated carbon steel wears a durable black oxide conversion coat, oil sealed and factory dry waxed for ultra low drive torque. The Type F fluted point taps clean female threads in a pre