National Equipment 73211 Nut, Flange, Serrated, 3/8-16

This part can be found in the following parts lists:

National 5000 Control Lever Assembly
National 505 Base and Cutting Head
National 5110 Control Lever Assembly
National 5200QL Control Lever Assembly
National 5280 Cutting Head
National 550 Cutting Head
National 5625 Dual Lift Lever Assembly
National 5625 Manual Lift Lever Assembly
National 5700 Control Lever Parts
National 6280 Bottom and Back Cover
National 6280 Cutting Head
National 7700 Control Lever Parts
National 8000 Lever Assembly
National Equipment 6280HD Bottom and Back Covers
National Equipment 6280HD Cutting Head