Pack of 2 Vintage 5/16" x 3/4" BSW Whitworth Cup Square Nuts & Bolts Unplated
5/16" British Standard Whitworth Imperial Threaded Cup Square Square Nuts & Bolts ( BSW). 2 5/16" BSW Whitworth hreaded sqaure nuts to fit. 2 Cup square bolts. 3/4" Long { approx 20mm } with a 5/16" Whitworth thread.