UNC CAP SCREWS ALLEN KEY SOCKET BOLTS BLACK HIGH TENSILE 1/4" 5/16" 3/8" 1/2"
UNC Cap Head Socket Screws. Thread pattern is UNC (Unified National Coarse). Cap screws with Allen key drive socket. Allen key size: 3/16". Allen key size: 1/4". Allen key size: 5/16". High tensile grade 12.9 steel.