#821791 Spec Diameter Thread Threads Length Grade Finish Weight 0.5 (1/2) Partial 13 4.5 (4 1/2) Grade 8 Phos & Oil .2709 Diameter 0.5 (1/2) Thread 13 Length 4.5 (4 1/2) Grade Grade 8 Finish Phos & Oil Weight .2709 Need Something Custom?