About

Sigma Fasteners provides quality bolting and coating for the energy industry.

Sigma Fasteners - API 20E-0017 Monogram

Sigma Fasteners – API 20E-0017 Monogram

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 License to manufacture API 20E bolting 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. We are ISO 9001 2008 certified and are on the approved vendor list of major wellhead manufacturers, energy and petrochemical companies worldwide. Our coatings applications include:

    • Whitford Xylan™
    • SermaGard® Ceramic Metallic
    • Everlube Product
    • MacDermid Chloride Zinc electroplating and trivalent chromate
Offshore BOP

Offshore BOP

We promise rapid and knowledgeable response and service. Please contact us with your requirements today. Please feel free to use the “Get Quote” form or  to “Contact” form above right to send  Sigma your custom bolting or standard fastener requirements.

Toll Free: (866) 378-3044

Phone: (281) 214-8800
Fax: (281) 214-8801