3a nut thread thread class right-hand nut thread 0.937" nut thread thread length 1.875" overall length 14 nut thread thread quantity per inch stud end drilled 0.375 in. from end to center of hole 0.141 in. dia for nylon insert. stud end chamfered 0.312 in. by 45.0 deg. nut end has 0.438 in. spherical radius unc nut thread thread series