1/4"-20 x 1-1/4" ASTM F593 18-8 Stainless Steel Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.750 INCHES NOMINAL FASTENER LENGTH: 1.210 INCHES MINIMUM AND 1.250 INCHES MAXIMUM HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM END ITEM IDENTIFICATION: 2320-01-528-6294 TRUCK, TANK NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 20 PART NAME ASSIGNED BY CONTROLLING AGENCY: HEX CAP SCREW MATERIAL: STEEL PROPERTY CLASS 18.8 OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: ASTM F593 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: PASSIVATE OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL THREAD SERIES DESIGNATOR: UNC