Single Ended, Double Ended, Waisted Washers Rounded, Square, Spring, Taper, etc. Materials Carbon Alloy, Stainless Steel and Exotics. Miscellaneous U-Bolts, HSFG, Foundation Bolts, Coach Screws and of course Specials to drawing or individual requirements. Studbolt and Nuts Imperial and Metric sizes from 1/4" (6mm) to 4" (100mm) diameter, manufactured in accordance with BS., ASTM. and DIN standards.