GRAINGER APPROVED . Z1098

Thumb Screw, Knurled,With Shoulder, Thread Size 5/16-24, Length 1 1/4 In, Steel, Finish Black Oxide, Head Dia 1 1/4 In, Head Height 1/4 In, Shoulder Dia 5/8 In, Shoulder Length 1/2 In, Rockwell Hardness B68-B71, Tensile Strength 57,000 Features Finish: black oxide Item: Thumb Screw Length: 1-1/4" Material: steel Thread Size: 5/16-24 Head Type: Knurled Tensile Strength: 57,000 Rockwell Hardness: B68 to B71 Shoulder Dia.: 5/8" Head Dia.: 1-1/4" H