Product details:

Part #: 0000-129873. Buy as few as 5 pcs. Discounts on larger quantities. PRODUCT SPECIFICATIONS Part #: 0000-129873 Fastener Type: Hex Cap Screw (Bolt) - USA Size Description: 5/8"-11 x 8 1/2" Diameter/Nominal Size: 5/8" Length: 8 1/2" Wrench Size/Across Flats: 15/16" (0.922-0.938") Width Across Corners: 1.051-1.083" Head Height: 0.378-0.403" Thread Pitch: 11 Thread Pitch Type: Coarse Thread Direction: Right System of Measurement: Inch Grade: 8 Material: Alloy Steel Finish: Thermal Black Oxide Head Type: Hex Drive Type: External Hex Average Piece Weight: 0.7885000 lbs. Country of Manufacture: United States Hex Cap Screws, are similar to hex bolts, but are manufactured with tighter tolerances than hex bolts for socket or wrench tightening, hex cap screws are available in both fully threaded and partial threaded varieties, and in many different materials.