3/8"-16 x 2" ASTM A574 Hex Drive Zinc Finish Alloy Steel Socket Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 2.000 INCHES NOMINAL HEAD STYLE: C49 FLAT CHAMFER HEAD DIAMETER: 0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM HEAD HEIGHT: 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM INTERNAL DRIVE STYLE: D5 HEXAGON END ITEM IDENTIFICATION: 4210-01-617-9403 NOMINAL THREAD DIAMETER: 0.375 INCHES WIDTH ACROSS FLATS: 0.3125 INCHES MINIMUM AND 0.3160 INCHES MAXIMUM THREAD QUANTITY PER INCH: 16 MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: UNC