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Stud Bolts

stud bolt is an externally threaded mechanical fastener. An assembly of stud bolt connections is usually formed by two nuts and the stud. Sometimes, washers and additional nuts may be used. In high-pressure piping and pipeline flange connections, stud bolts are widely used.

Stud Bolt Materials

For high-temperature and pressure services, ASTM A193 is the most widely used flange material. Grade B7 and B7M are the most frequently used A193 material grades. For low-temperature services ASTM A320 Gr L7, L7A, and L7B are used. Other stud bolt materials include the following:

  • ASTM A354 Gr BC, BD
  • ASTM A540 Gr B21 to B24
  • ASTM A193 Gr B5, B6, B8, B16, B8M, B8A, B8T, L7, B17B.
  • ASTM A453 Gr 660A/B/C/D
  • ASTM A913 Inconel 718
  • ASTM A320 Gr L7M, L43, B8, B8A, B8T, B8MA, B8C
  • ASTM A182 Gr S31803, S32205.

ASTM A193 Grade B7 Stud Bolts coupled with a pair of nuts are most commonly used fasteners for bolting carbon steel pipelines. A193 Grade B7 Stud Bolts with full threads, double end threads and tap end thread configuration. We offer b7 stud bolts in both metric and imperial sizes with coarse, fine & extra fine threads. These stud bolts are produced with full compliance to all requirements of ASTM A193 Grade B7 specification and supplied with authentic 3.1 certificate. Size range ¼” up to 2”