Harley Davidson Replica Case Insert Nut – Panhead 1955–1968 OEM 24031-55

This replica Harley Davidson case insert nut is designed with a reversed spiral machined into the inner diameter to aid in oil control—just like the originals. Because of this design, no rubber seal is required, making it a correct and clean solution for vintage Panhead engine cases.

This part replaces Harley-Davidson OEM 24031-55 and is the right choice for builders who want proper oil management without modern shortcuts. Ideal for restorations, repairs, or period-correct engine work, this insert nut helps keep oil where it belongs while maintaining the original mechanical design Harley used during the Panhead era.

Built for riders and builders who care about doing it right the first time.

Fitment

Harley-Davidson Panhead models

1955–1968

Replaces Harley-Davidson OEM 24031-55

Rubber seal not required