• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Sigma Fasteners

Manufacture and Distribute Fasteners for Energy

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

  • Products
    • Custom Bolting
    • Coated Bolts
    • Stud Bolts
    • Products
    • Flange Bolt Chart
    • Worldwide
  • ZNnGard
  • Industries
  • Quality
    • Survey
  • Get Quote
  • Contact
    • Careers
  • About
    • Press Releases
    • Conflict Minerals Sourcing Policy
    • Privacy Policy
You are here: Home / Archives for 660 bolts

660 bolts

Double End Studs

By Sigma Fasteners on January 11, 2017

Duplex Stainless Double End Studs Bolts

 

Double End Studs – Double ended studs

Double End Studs Bolts
Double End Studs

At Sigma Fasteners we provide mission critical bolting products for the nations leading manufacturers of pressure control equipment for controlling pressures during drilling and oil production.

Double-end studs used by many of these manufacturers have equal-length threads on each end to accommodate a nut and are threaded to a Class 2A fit. Length of stud is measured overall. Both ends have chamfered points, but round points may be furnished on either or both ends at the manufacturer’s option, This style is furnished in the same four types listed for tap-end studs. Double-end studs are used for flange bolting or other applications where torching from both ends is necessary or desirable.

Most steel grades not heat treated or quenched and tempered can be furnished on special order for production quantities. Only the Type 2 continuous thread studs made to specification ASTM A193 grade B7 are stocked in a full range of sizes.

ASTM Material Selection Chart B7, B7M, L7, L7M, 660, 718 Inconel, MP35N

Flange Bolts

By Sigma Fasteners on November 13, 2016

Custom Flange Screw
Custom Flange bolt

These hexagonal headed or double hex headed bolts are recognizable by the oversized washer face on the bolt head which forms a distinct ridge. This built-in washer under the head of the bolt distributes the fastening force over a large area. A flange bolt is designed to provide the clamping power over a washer and bolt combination. Available in both Hex Head and 12 point double hex head selections. The 12 Point Flange Bolts and Screws are an alternative head design with more torqueing force than standard hex cap screws. The twelve point design permits greater torque to be applied to the screw.

There are many critical design features of a flange bolt or flange screw including the fillet on the underside of the head. The fillet is the transitional curve from the bearing to the body of the fastener. Bearing surface on the flange screw or flange bolt is also key to its design integrating the extra grip strength. In addition, wrenching height on a flange bolt or flange screw is critical dimension that is measured from the top of the head to the top of the flange.

Sizes are available from ½ – 2 inch in a variety of ASTM fastener grade alloys and available to custom manufacture per print specifications.
These can be coated or plated with a variety of finishes. Xylan, PTFE, SermaGard and zinc and bake.

12 Point Flange Screws
12 point Flange Bolts

Email us for a Quote:

    Your Name (required)

    Your Email (required)

    Phone Number (required)

    Company (required)

    Message

    Attach File: Allowed File types: .pdf .txt .tif .tiff .jpg .doc .docx .dwg .xls .xlsx
    Max 2MB

    Tap End Stud

    By Sigma Fasteners on November 13, 2016

    Tap End Stud Bolts

    Sigma Fasteners manufactures Tap End Stud bolts to your print, Tap End Stud Bolt Standard or AWHEM Standard in all ASTM grades.

    Tap End Stud Bolts
    Tap End Stud Bolts

    Tap end studs have a short thread length on the tap-end side typically threaded tor Class UN-3A fit. This side is screwed into a tapped hole. The nut end  of the stud is threaded with a Class UN-2A fit. Length of the stud is measured form end to end. The tap end has a chamfered point, but the nut end may have either a 30° or 45° chamfered end or round raduised end, at the customers option.The tap end can be measured from the end to last scratch, end of the chamfer to the last full thread or any combination of last scratch, last full thread, end or end of chamfer.

    Tap-end studs in standard and exotic metals with multiple finishes:

    ASTM B7, B7M, B8, B8M, 660,718, 17-4ph, MP35 and more.

    Unfinished, SermaGard, Xylan, PTFE. Moly, zinc or cad plated.

    Sigma can lower your cost for tap end studs with contract pricing or managed inventory.

    ASTM Material Selection Chart

    Catalog: Tap End Stud

      Your Name (required)

      Your Email (required)

      Phone Number (required)

      Company (required)

      Message

      Attach File: Allowed File types: .pdf .txt .tif .tiff .jpg .doc .docx .dwg .xls .xlsx
      Max 2MB

      High Strength Super Alloy Bolts

      By Sigma Fasteners on March 14, 2016

      17-4 custom bolts

      High Strength Super Alloy Bolts

      17-4 is a precipitation hardening Stainless steel alloy. This chromium-nickel grade stainless steel has excellent mechanical strength. It corrosion resistance and high strength properties hold up very well in high temperature service up to 800 degrees F.  17-4 is used for high strength and elevated temperatures as well as in applications where high fatigue strength is required. 17-4 has good resistance to galling, seizing and stress corrosion. The corrosion resistance of 17-4 is superior to other chromium nickel stainless alloys.

      17-4 Multiple Conditions available:

      H 1100 – Tensile Strength 140 ksi

      HH 1150 – Tensile Strength 135 ksi

      13-8 Custom Bolts

      13-8 is a precipitation hardening stainless steel. It is much like 17-4 in that it is a high strength stainless while possessing excellent corrosion resistance. 13-8 stainless alloy is used when good stress corrosion cracking resistance is required.

      660 Custom Bolts

      ASTM A453 660 Grade A,B or D a heat treated and age hardened version of A-286 is a popular high temperature precipitation hardened alloy. The high strength and oxidation resistance up to 1500 degrees F. 660 has excellent corrosion resistance up to 1300 degrees F and has fair salt spray corrosion resistance.

      Material Selection Chart

      Get a quote

        Your Name (required)

        Your Email (required)

        Phone Number (required)

        Company (required)

        Message

        Attach File: Allowed File types: .pdf .txt .tif .tiff .jpg .doc .docx .dwg .xls .xlsx
        Max 2MB

        Primary Sidebar

        Products and Services

        • Coated Bolts
        • Custom Bolts
        • Fasteners
        • Industrial Coating Service
        • Press Releases
        • Stainless Bolts
        • Standard Bolts
        • Stud Bolts
        • Trade Shows

        More

        • About
        • About
        • Careers
        • Contact
        • Flange Bolt Chart
        • Get Quote
        • Industries
        • Jobs
        • Privacy Policy
        • Products
          • Coated Bolts
          • Custom Bolting
          • Stud Bolts
          • Worldwide
        • Quality
          • Conflict Minerals Sourcing Policy
          • Survey
        • Sigma Fasteners

        Toll Free: (866) 378-3044
        Phone: (281) 214-8800
        Fax: (281) 214-8801

        • Products
        • ZNnGard
        • Industries
        • Quality
        • Get Quote
        • Contact
        • About

        Careers · Privacy Policy · Conflict Minerals

        © 2004–2025 · Sigma Fasteners, Inc

        We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
        Do not sell my personal information.
        Cookie SettingsAccept
        Manage consent

        Privacy Overview

        This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
        Necessary
        Always Enabled
        Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
        CookieDurationDescription
        cookielawinfo-checkbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
        cookielawinfo-checkbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
        cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
        cookielawinfo-checkbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
        cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
        viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
        Functional
        Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
        Performance
        Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
        Analytics
        Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
        Advertisement
        Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
        Others
        Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
        SAVE & ACCEPT