TM 9-2320-364-34-4C-29C-28. SPANNER SOCKET.Fabricate spanner wrench from any 2 1/2 in. (63.50 mm) OD socket.a.Weld four 2 in. (50.80 mm) long strips of 3/16 in. (4.83 mm) keystock on socket, so that 1/2 in. (12.70 mm)extends beyond socket face.C-29. STEEL DISC.Fabricate steel disc from 2.5 in. (63.5 mm) round steel stock. Using a hacksaw, cut to dimension shown. File offrough edges.