1/4"-20 x 1" Grade 5 ECOGUARD® Finish Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.750 INCHES NOMINAL FASTENER LENGTH: 1.00 INCHES NOMINAL 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: 2330-01-603-3559 NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 20 PART NAME ASSIGNED BY CONTROLLING AGENCY: 1/4"-20X1" GRADE 5 ECOGUARD FINISH HEX CAP SCREW MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: GRADE 5 STEEL PER SAE J429 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL AND ALUMINUM THREAD SERIES DESIGNATOR: UNC