1/4"-20 x 1-1/4" SAE J429 Grade 5 Zinc Finish Steel Tap Bolt / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 1.21 INCHES MINIMUM AND 1.25 INCHES MAXIMUM HEAD STYLE: C1 HEXAGON HEAD HEIGHT: 0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM PART NAME ASSIGNED BY CONTROLLING AGENCY: TAP BOLT 1/4"-20X1-1/4" SPECIAL FEATURES: WRENCH SIZE-7/16INCH, WEIGHT- 0.022, FULL THREAD- COARSE MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: UNC