Custom Bolts in Inconel 718, 17-4PH, MP35N and other Special Materials.
Sigma manufactures custom bolts and fasteners in inconel 718, 17-4PH, MP35N, hastoloy, ASTM L7M and B7M, B7, L7, ASTM 660, B16, 304 and 316 stainless steel, and other high nickel alloys. We custom specialty fasteners for leading Valve and Pressure Control manufacturers around the world. Sigma Fasteners supplies our customers with the highest quality fasteners and bolts.
We can produce bolts 4 inches in diameter and handle lengths over 4 feet on our state of the art CNCs. We thread metric, UN, UNC, and UNF send us your thread length and a pitch and we’ll go to work for you.
If you don’t find what you need listed give us a call or send us your print or drawing. We’re sure we can make your custom specialty bolt!
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