A-B12001066MA-AI SCREW, 3/8X.50 HHSOCOne New Aftermarket Replacement 3 8" x 1 2" Hex Head Socket Cap Screw This hex head socket cap screw (HHSOC) measures 3 8" in diameter with a 1 2" length and is driven with a hex (Allen) socket key. Socket cap screws are used throughout agricultural, lawn and garden, and construction equipment assemblies wherever a hex key drive and a low profile or recessed installation is required. Specifications Type: Hex Head Socket Cap Screw (HHSOC) Thread