Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Bright-Zinc Steel ISO 4035 Improved Tuning Stability: Locking nuts

Improved Tuning Stability: Locking nuts clamp strings in place to prevent slippage

50 stainless steel flat socket cap screws in bulk

Q: What materials are these hex keys made from

making them a dependable choice for projects that demand both strength and corrosion resistance

Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Bright-Zinc Steel ISO 4035 Improved Tuning Stability: Locking nutsMonster 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