5/16"-18 x 7/8" ASTM F593 18-8 Stainless Steel Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 0.875 INCHES NOMINAL END ITEM IDENTIFICATION: NSN 8145-01-598-4828 NOMINAL THREAD DIAMETER: 0.312 INCHES MATERIAL: STEEL COMP 304 OVERALL SURFACE TREATMENT: PASSIVATE OVERALL THREAD SERIES DESIGNATOR: UNC SPECIFICATION/STANDARD DATA: 05047-ASME B18.24-2004 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD