For pricechoose optionsSelect Option 1 - 2in BSPT 1/2 - 3/4in BSPT 1/2 - 3in BSPT Quantity Add to Basket RIDGID Pipe and Bolt Dies for Machine Die Heads. Requires British model die head. Pipe dies for use in British Universal die heads (NOS. 504A, 811A, 815A, 816, 817, 856, 911 & 913).