1/4" x 1.3/4" BSW Whitworth Allen Caphead Bolts Screws 20tpi 65-3063 (bag of 10)
New 1/4" x 1.3/4" Whitworth, BSW Allen (caphead) screws. Chequered markings on side of heads. Bright Zinc plated. Nookys Nuts have been trading cycle thread and bsf nuts, bolts and washers for many years at autojumbles across the country.