This is the Hair Pin for the Boom Lift Cylinder Pin BK-518. This hair pin keeps the clevis pin from pulling out and letting the cylinder fall off the boom.
Fits:
Century Express 300 Series (03/1998 - Current)Century 211 & 212 (11/1997 to Current)Challenger Express 4300 Series (03/1998 - Current)Champion Model 101 (09/1994 - Current)Holmes 440 Series / DFT 400 (10/1994 - Current)Length: 3.3"Width: 1.11"Height: 0.15"