1/4"-28 x 1-1/4" Grade 5 Plain Finish Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.750 INCHES NOMINAL FASTENER LENGTH: 1.21 INCHES MINIMUM AND 1.25 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: 3930-01-599-9978 NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 28 CHAMFER ANGLE: 15.0 DEGREES MINIMUM AND 30.0 DEGREES MAXIMUM PART NAME ASSIGNED BY CONTROLLING AGENCY: 1/4-28X1-1/4 PLAIN FINISH SAE J429 GRADE 5 HEX CAP SCREW SPECIAL FEATURES: SCREW IS COATED WITH A LIGHT PROTECTIVE OIL MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: GRADE 5 PER SAE J429 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL THREAD SERIES DESIGNATOR: UNF