#014551 Spec Diameter Thread Threads Length Grade Finish Weight 0.3125 (5/16) Partial 18 2.5 (2 1/2) Grade 8 Plain Finish .0615 Diameter 0.3125 (5/16) Thread 18 Length 2.5 (2 1/2) Grade Grade 8 Finish Plain Finish Weight .0615 Need Something Custom?