Loos Cableware® Division provides the full line of Turnbuckle Bodies in Brass, Steel and Aluminum. These Turnbuckle Bodies meet all the requirements of MS21251 (Same as NAS649). The brass Turnbuckle Bodies (also available nickel plated for marine applications as a special order) uses MS21256 Locking Clips to provide a positive lock with the mating part. Turnbuckle Body MS21251.