1/4" x 1/2" BSW Whitworth Allen Caphead Bolts Set Screws Pack of 10 BZP
New 1/4" x 1/2"Whitworth, BSW Allen (caphead) screws, Bright Zinc plated. Nookys Nuts have been trading cycle thread and bsf nuts, bolts and washers for many years at autojumbles across the country.