Big Bolt is a fastener supplier providing next-day manufacturing, even on custom orders. Learn more about our OEM and distributor fastener products and services.

Big Bolt is one of the largest, specialty fastener machine shops in the United States. Our large supply of blanks and bar stock, and a near non-stop manufacturing schedule allow us to get you what you need when you need it—even custom orders.

Lightning Bolt & Supply is your one-stop source for large diameter standard and metric fasteners. Regardless of the material, plating, or testing requirements; we can make it happen! Our fastener experts will exceed your projects needs. Our capabilities run up to 6” in Diameter and 150mm.

Our inventory includes thousands of bolts in hundreds of sizes, including high-temperature and high-pressure applications. We also have the raw materials and blanks for custom-made orders that will meet your needs. Looking for custom Bolts? If you need your fasteners made to …

Headquartered in Bloomingdale, IL, Big Bolt is ISO-certified and has been manufacturing high-quality fasteners and specialty fasteners for over 45 years. BIGGEST SPECIALTY FASTENER INVENTORY IN THE BUSINESS

Big Bolt has been supplying high quality specialty fasteners since 1977 to a variety of clients and industries including Agriculture, Automotive, Construction, Defense, Energy, Industrials, Mining, and Transportation.

Apr 9, 2025 · Big Bolt LLC manufacture almost all bolt and nut types in ASME, ASTM and ISO standards in diameters as small as M6 or 3/16” and as big as M80 and 3-1/2”. We offer long and split length fasteners. We have the ability to make just about any fastener in 24 hrs. ISO-9001:2015, ITAR registered.

All Size Supply offers bolts in numerous sizes & styles, including hex bolts, structural bolts, carriage bolts, tap bolts & more. Order yours today.

Associated Fastening Products is ISO 9001:2008 certified and proud to offer large diameter bolts for a variety of industries and applications. Our advanced hot forging capabilities can hot head bolts based on customer specifications with fast turnaround times.