Bolts, screws, industrial fasteners and other hardware products. Rishi International offers Range of Bolts is from M3 to M75 lengths up to 900 MM in Metric Sizes and 1/8 to 3" and lengths up to 36" in Imperial Sizes. We specialise in custom fasteners and have developed many new types of Flange Bolts, Machine Bolts, and Hex Bolts etc.