JIMS Pinion Shaft Nut 5/8-24 for Harley Big Twin 1954–1989 – Replaces OEM 24023-54

This JIMS pinion shaft nut is designed for Harley-Davidson Big Twin engines using a 5/8-24 threaded pinion shaft.

The nut secures the pinion gear to the shaft and is a critical fastener in the cam and timing gear assembly. Proper fit and thread quality are essential to maintain correct gear alignment and long-term engine reliability during service or rebuild work.

Designed for Harley-Davidson Big Twin models from 1954 through 1989, this pinion shaft nut is intended for stock-style pinion shafts used across Panhead, Shovelhead, and early Evolution applications.

This part replaces Harley-Davidson OEM 24023-54. Manufactured in the United States by JIMS. At Boomers Bike Shop, we stock engine fasteners that fit correctly and are trusted for real Harley-Davidson engine builds.

Fits Harley-Davidson Models:

FX: 1954–1984

FXR: 1982–1989

FL: 1954–1984

FXST: 1984–1989

FLST: 1986–1989

FLT: 1979–1989

⚠️ Designed for 5/8-24 threaded pinion shafts. Verify thread specification before installation.