Type M51 – Male Double Swivel Socket Member admin | August 9, 2020 One part of a type C51 combination fitting. This fitting can also be used for attaching flat panels to tubular structures. Add to quote Categories: All Products, Fitting, Klamp, Swivel Fittings Description Description Related products Type M50 – Male Single Swivel Socket Member Type 16 – Clamp-on Tee Type 29 – 30° to 60° Single Socket Tee Type C50 – Single Swivel Socket