#821197 Spec Diameter Thread Threads Length Grade Finish Weight 0.3125 (5/16) Partial 18 0.625 (5/8) Grade 5 Phos & Oil .0232 Diameter 0.3125 (5/16) Thread 18 Length 0.625 (5/8) Grade Grade 5 Finish Phos & Oil Weight .0232 Need Something Custom?