Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Bright-Zinc Steel ISO 4035 Head / Drive: Unslotted indent

Head / Drive: Unslotted indent hex-washer (5⁄16″ A/F) — smooth top forge

Bulk 3/8-16 Slotted Indented Hex-Washer Head Taptite Alternative Thread-Rolling Screws from Monster Bolts give you true job-site flexibility—drive them with a 9/16″ nut-driver for speed or a big flat-blade screwdriver when power tools aren’t handy

Q: What materials are these hex keys made from

Material: Alloy steel with a durable thermal black oxide coating for a smooth

Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Bright-Zinc Steel ISO 4035 Head / Drive: Unslotted indentMonster Overview: When standard countersinks are too shallow or sheet metal is wafer thin, choose #4 40 Phillips Flat Undercut Thread Cutting Screws. The undercut head trims most of the 82 cone, giving you maximum thread engagement while finishing perfectly flush in sheet as thin as 0. 040. Heat treated carbon steel sports a brilliant bright zinc electro plate, is hydrogen relief baked to banish embrittlement, and topped with a factory dry wax film