OEM Replacement Hardware Kit for ROHN H30 Telescoping Mast Replacement hardware for the ROHN H30 Mast Genuine ROHN Parts. OEM Factory Hardware. Pre-Galvanized Steel Includes the following: (2) 280002 1/4" x 3" Cotter Pin (1) GR3 1-3/4" Guy Ring (1) C3A 1-3/4" Mast Clamp w/ Bolt Assembly (1) C2A 1-1/2" Mast Clamp w/ Bolt Assembly (2) GR1 1-1/4"Guy Ring (1) C1A 1-1/4" Mast Clamp w/ Bolt Assembly