Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Bright-Zinc Steel ISO 4035 Material: Alloy steel with a

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

Specification Details Diameter 1/4″ Thread Size 1/4-20 UNC (Coarse Thread) Drive Size 5/32″ Hex (Allen) Head Type 82° Flat Head Socket Cap Screw (FHCS) Material Alloy Steel Finish Thermal Black Oxide Standards ASME B18

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

DIN 934 Class 10 Hex Nuts are designed for strength and reliability

meeting SAE’s highest grade specifications

Bulk #4-40 Phillips Flat-Undercut Thread-Cutting Screws — Type F, Bright-Zinc Steel ISO 4035 Material: Alloy steel with aMonster 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