5/8"-11 x 2-1/4" Phosphate and Oil Finish SAE J429 Grade 8 Hex Flange Bolt / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 2.250 INCHES NOMINAL HEAD STYLE: C7 HEXAGON EXTENDED WASHER HEAD HEIGHT: 0.620 INCHES NOMINAL WIDTH BETWEEN FLATS: 0.940 INCHES NOMINAL EXTENDED WASHER DIAMETER: 1.330 INCHES NOMINAL EXTENDED WASHER THICKNESS: 0.100 INCHES NOMINAL END ITEM IDENTIFICATION: NSN 2320-01-097-0260 HEMTT (HEAVY EXPANDED MOBILITY TACTICAL TRUCK); NSN 2320-01-304-2277 PLS (PALLETIZED LOADING SYSTEM); NSN 4210-01-486-1035 TFFT (TACTICAL FIRE FIGHTING TRUCK);2320-01-442-1940, TRUCK, CBT, (COMMAND BRIDGE TRANSPORTER);2320-01-097-0248,2320-01-097-0249,2320-01-100-7672,2320-01-097-0260,2320-01-195-7641 HEMTT (HEAVY EXPANDED MOBILITY TACTICAL TRUCKS) NOMINAL THREAD DIAMETER: 0.621 INCHES FEATURES PROVIDED: FINISHED HEAD THREAD QUANTITY PER INCH: 11 MATERIAL: STEEL OVERALL SURFACE TREATMENT: PHOSPHATE OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL THREAD SERIES DESIGNATOR: UNC