Triumph Norton BSA 1/2 inch X 20 TPI Bar Turned Hex Nut(s) CEI PN# TBS-4040 DS48 99-3557 15-5753

This 1/2-20 CEI nut is used in many applications where larger fasteners are fitted. PNs DS48 99-3557 15-5753
Bar-cut 1/2-20 TPI CEI nut made in the UK.

This nut is used in various applications where larger fasteners are called for, such as footrest studs and engine and transmission mounts. Universal fitment for motorcycles with CEI threaded fasteners from 1945-1969.

The nut is threaded onto a bolt or stud, usually accompanied by a flat or spring washer.