This is a A-C-48 Bolt, Rotary Mower Blade PN: C-48Main Description As Following : A-C-48 Bolt, Rotary Mower Blade P.N: C-48 Flat Side on ShoulderBolt Diameter: 1.246"Head Diameter: 2.45"Neck Diameter: 1.246"Overall Length: 3.86"Shoulder Diameter: 1.50"Shoulder Length: 1"Thread Length: 1.74" Stocked As: A-7A5548 Found in Section & Models : Hay Tool Parts > Rotary Cutter Blade Bolts & Nuts, Hardee ROTARY CUTTER: HS260CO, Hardee ROTARY CUTTER: H360CO, Hardee ROTARY CUTTER: T160LT, Hardee ROTARY CUTTER: T160LTO, Hardee ROTARY CUTTER: T166LT, Hardee ROTARY CUTTER: T166LTO, Hardee ROTARY CUTTER: T172LT, Hardee ROTARY CUTTER: T172LTO, Hardee ROTARY CUTTER: 52LT, Hardee ROTARY CUTTER: 60LT, Hardee ROTARY CUTTER: 60LTO, Hardee ROTARY CUTTER: 66LT, Hardee ROTARY CUTTER: 66LTO, Hardee ROTARY CUTTER: 72LT Associated Items : New Also This is An Aftermarket Product And : Flat Side on Shoulder Bolt Diameter: 1.246" Head Diameter: 2.45" Neck Diameter: 1.246" Overall Length: 3.86" Shoulder Diameter: 1.50" Shoulder Length: 1" Thread Length: 1.74"