Weld Nut Material Steel Finish Black Oxide Thread Size 1/4 In.-20 Base Height 3/64 in Base Width 1/2 in Base Length 13/16 in Collar Height 0.023 in Collar Diameter 0.125 in Number of Weld Projections 2 System of Measurement Inch Base Shape Tab For Hole Diameter 5/16 in Hole Location Center Pack Size Small Pack Package Quantity 50