1/2"-13 x 2-1/2" Grade 5 Zinc Finish Hex Cap Screw - Made in USA / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.25 INCHES NOMINAL FASTENER LENGTH: 2.44 INCHES MINIMUM AND 2.50 INCHES MAXIMUM HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM END ITEM IDENTIFICATION: 4940-01-591-0265 NOMINAL THREAD DIAMETER: 0.50 INCHES THREAD QUANTITY PER INCH: 13 SPECIAL FEATURES: MATERIAL IS GRADE 5 STEEL MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: PER SAE J429 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: PER ASTM F1941 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL THREAD SERIES DESIGNATOR: UNC