1/4"-28 x 1" Grade 8 Yellow Zinc Finish Hex Cap Screw / THREAD LENGTH: 1.000 INCHES NOMINAL FASTENER LENGTH: 1.000 INCHES NOMINAL HEAD STYLE: C1 HEXAGON END ITEM IDENTIFICATION: FIXED WING AIRCRAFT, C130J HERCULES, LOCKHEED MARTIN CORP NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 28 SPECIAL FEATURES: GRADE 5 FULLY THREADED MEDIUM-STRENGTH HEX HEAD MATERIAL: STEEL OVERALL