Great Planes Socket Head Screws feature a rust resistant zinc alloy plating. This plating resists corrosion keeping the screws in top notch condition year after year. The screws come in many sizes for most modeling applications. FEATURES: The screws feature a special zinc plating that resist corrosion INCLUDES: The screws come 4 per package and come in a special reusable plastic Parts Pak that can hang neatly on a peg board or in a field box. SPECS: 4-40 x ¾" socket head cap screw REQUIRES: 3/32" hex wrench (GPMR8002) KPM 10/25/93 ir/jl