C. Sherman Johnson Jaw/Jaw Open Body Turnbuckle - 1/2-20 Thread 1/2-20 Thread. The forged silicon bronze body coupled with their integral toggle jaw provides positive locking and ease of adjustment.Forged silicon bronze bodies with 316 stainless ends offer a great non-galling combination. Integral toggle jaw eliminates the need for a separate rigging toggle. Package Contents: C. Sherman Johnson Jaw/Jaw Open Body Turnbuckle C. Sherman Johnson 45-100: Jaw/Jaw Open Body Turnbuckle - 1/2-20 Thread 1/2-20 Thread