1/4"-20 x 3-1/2" Grade 5 Yellow Zinc Finish Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.750 INCHES NOMINAL FASTENER LENGTH: 3.440 INCHES MINIMUM AND 3.500 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: 2320-01-465-2174; MRAP - COUGAR ISS 1.0; MRAP - M-ATV UI; MRAP - COUGAR ISS 1.5 NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 20 MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429, GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM F1941, FE/ZN 5C ASSN STD SINGLE TREATMENT RESPONSE OVERALL THREAD SERIES DESIGNATOR: UNC