5/8"-11 x 5" ASTM A574 Hex Drive Black Oxide Finish Alloy Steel Socket Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 5.0 INCHES NOMINAL END ITEM IDENTIFICATION: 2590015885057 NOMINAL THREAD DIAMETER: 0.625 INCHES THREAD QUANTITY PER INCH: 11 MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL THREAD SERIES DESIGNATOR: UNC