1/2" Yellow Zinc Finish Medium Split Lock Washer / HOLE DIAMETER: 0.509 INCHES MINIMUM OUTSIDE DIAMETER: 0.873 INCHES NOMINAL MATERIAL THICKNESS: 0.125 INCHES NOMINAL END ITEM IDENTIFICATION: HEMTT FAMILY (HEAVY EXPANDED MOBILITY TACTICAL TRUCKS) 2320-01-304-2277 PLS (PALLETIZED LOAD SYSTEM); NSN 2320-01-318-9902 HET (HEAVY EQUIPMENT TRANSPORTER); 3990-01-444-5196 CEMENT MIXER CRITICALITY CODE JUSTIFICATION: FEAT SPECIAL FEATURES: WEAPON SYSTEM ESSENTIAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL AND CHROMATE SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-Z-325 CL 3,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL STYLE DESIGNATOR: 108 SPLIT HELICAL-RIGHT HAND