Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Black-Oxide Steel Size_M22 these washers are dimensionally equivalent

these washers are dimensionally equivalent to the NAS620 specifications

Feature Details Diameter / Thread #4-40 UNC Available Lengths Fully threaded — select length above Head / Drive Indented Hex-Washer (flange hex) Point Style Taptite-style trilobular thread-rolling Material Carbon Steel Finish Zinc Bake & Wax (RoHS) System of Measurement US / Inch Standards Meets ASME B18

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

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

ensuring your project’s success

Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Black-Oxide Steel Size_M22 these washers are dimensionally equivalentMonster 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