Sigma Fasteners provides quality bolting and coating for the energy industry.
Sigma is a manufacturer and distributor of ASTM bolting specified by the American Petroleum Institute. Sigma holds an American Petroleum Institute API 20E-0017 Monogram to manufacture API 20E bolting, API 20F-0007 Monogram, and is certified API Spec Q1, 9th edition. Sigma Distributes standard bolting and manufactures custom bolts to customer specifications and per print, following careful details of the latest revisions.
Custom Bolting, Stud Bolts, Bent Eye Bolts, Carriage Bolts, Elevator Bolts, Ferry Cap Screws, Flange Bolts, Heavy Hex Bolts, Hex Bolts, Hex Lag Screws, J-Bolts, Penta Bolts, Rod End Bolts, Step Bolts, Structural Bolts, Tap Bolts, Tension Control Bolts, Toggle Bolts, U-Bolts, Castle Nuts, Clinching Nuts, Coupling Nuts, Heavy Hex Nuts, High Nuts, Jam Nuts, Lock Nuts, Slotted Nuts, Spring Nuts, Spherical Faced Nuts, Square Nuts, Wing Nuts, Clevis Pins, Cotter Pins, Dowel Pins, Hairpin Clips, Hitch Pins, Lynch Pins, Taper Pins, Rivets, All Thread Rod, Security Screws, Set Screws, Socket Screws, Collar Studs, Combo Studs, Double End Studs, Pad Studs, Tap End Studs, Turbine Bolts, Belleville Washers, Beveled Washers, Bonded Sealing Washers, Conical Washers, Fender Washers, Flat Washers, Load Indicating Washers, Lock Washers, Coating Service (Whitford Xylan™, SermaGard® Ceramic Metallic, Everlube Product, MacDermid Chloride Zinc Electroplating and Trivalent Chromate, ZNnGard™)