T-Bolt 4140 Steel 3/8-16x3
TE-CO 46263 T-Bolt High Strength 4140 Steel Black Oxide Finish Thread Size 3/8-16 Thread Type UNC Length under Head 3 In Thread Length 2 In Head Height 1/4 In Head Width 11/16 In Slot Size (In) 3/8 In Tensile Strength 5425 PSI Rockwell Hardness C32-C36 Meets/Exceeds Grade 5