5/8"-11 x 2-3/4" Grade 5 Zinc Finish Hex Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 2.750 INCHES NOMINAL HEAD STYLE: C1 HEXAGON END ITEM IDENTIFICATION: LGM30 NOMINAL THREAD DIAMETER: 0.625 INCHES THREAD QUANTITY PER INCH: 11 SPECIAL FEATURES: HEAD IS FLANGED; BOLT HAS A PLAIN FINISH THREAD SERIES DESIGNATOR: UNC