This is the 4-40x1" Socket Head Bolt & Blind Nut Set from Du-Bro. FEATURES: High strength steel construction. High round cap head screws/bolts with a hexagon socket drive insert. Plain Silver 4-40 blind nuts. Plain Silver flat washers (1/8" ID). Plain Silver slotted lock washers (1/8" ID). Plain Black allen wrench. INCLUDES: (4) Bolts (4) Flat Washers (4) Lock Washers (4) Blind Nuts (1) Allen Wrench SPECS: Thread Size: 4-40 Allen Wrench Size: 3/32" Screw/Bolt Length: 1" tjt 040702 ir/kh kr3/14/03