Weld Nut Material Steel Finish Black Oxide Thread Size 5/16 In.-18 Base Height 1/8 in Base Width 5/8 in Base Length 63/64 in Collar Height 0.078125 in Collar Diameter 0.359375 in Number of Weld Projections 0 System of Measurement Inch Base Shape Hex Barrel or Collar Type Pilot For Hole Diameter 3/8 in Hole Center to Outside Edge 9/32 in Hole Location Offset Pack Size Small Pack Package Quantity 50