This listing is for two replacement Bush Hog keyed blade bolt kits, code 66516 which includes two heat treated blade bolts code 1259, two hardened lock-washers code 15824 (66) and two hardened jam nuts code 15626 (67). We recommend you change your blade bolts when replacing your blades, worn blade bolts are dangerous and should not be used. Make sure you tighten your blades bolts to the manufacturers recommended torque which should be found in your owners manual. If you can not find the torque specification for your mower please feel free to contact us and we will help you locate it. 
 
3" Overall Length, 0.875 Thread with 14 Pitch
2.00" Diameter X 0.47" Thick Bolt Head
1.25" Diameter x 0.43" Wide Blade Shoulder
Heat Treated Forged Steel, Hardened Jam Nut and Lock Washer
Made in USA