This is a A-7A5997 Bolt, Rotary Cutter Blade PN: 7A5997Main Description As Following : A-7A5997 Bolt, Rotary Cutter Blade P.N: 7A5997 R/H Thread- .125" pin holeBolt Diameter: 1.00"- 14 UNSHead Diameter: 1.48" hexNeck Diameter: -Overall Length: 3.56"Shoulder Diameter: 1.00"Shoulder Length: .65"Thread Length: 2.27" Found in Section & Models : Miscellaneous > Miscellaneous, Mono (UNDEFINED): VARIOUS MODELS Associated Items : New Also This is An Aftermarket Product And : Bolt Diameter: 1.00"- 14 UNS Head Diameter: 1.48" hex Neck Diameter: - Overall Length: 3.56" Shoulder Diameter: 1.00" Shoulder Length: .65" Thread Length: 2.27"