UNF

UNF-Unified Fine Thread. American fine thread used on late 50s, 60s and early 70s British and American Cars.

UNC

UNC – Unified Course Thread. American Coarse Thread used on late 50s, 60s and early 70s British and American Cars.

METRIC

Metric Coarse Thread

BSF

British Standard Fine Thread used on cars from the 30's, 40's 50's and Morris Minors

BSW (Whitworth)

British Standard Whitworth. British Coarse thread used on British cars from 30's, 40's and 50's.

Metric Fine

Metric Fine Thread.

BSCyc

British Standard Cycle Thread

2BA

British Association used on all electrics in cars and buildings

BUMPER BOLTS