Superior Bolt & Nut Mfg.

Superior Bolt is a leading supplier of high-quality, large diameter specialty fasteners. With manufacturing plants in the United States and abroad, Superior Bolt has the experience and capacity to handle any size order.

Superior Bolt takes pride in the quality of our products. All of our fasteners meet the highest quality standards from our ISO certified factories. In addition to our custom manufacturing capabilities, Superior Bolt maintains a large inventory of large diameter bolt blanks. These bolt blanks can be cut and threaded to your specifications and shipped to you within 24-48 hours.