Studbolts for the oil and gas sector

If there is one sector where safety and security is issue number one, it will be the oil and gas sector. Companies in the (petro)chemical and refining market, as well as oil and gas installations have to comply with extremely demanding requirements. This demands an excellent choice in your supplier of fastening materials.

MARO Fasteners ensures products of excellent quality. Because we only work with trustworthy manufacturers your operational reliability is assured. Especially during turnarounds and emergency repairs you do not want to take anything for granted. Needless to say that all our products comply with the guidelines and meet the safety standards and regulations.

Would you like to have your fasteners be inspected by a third party?

At your request, MARO Fasteners can have your fasteners inspected by one of the specialised organisations.


  • Studbolts

Diameters: 3/16″ – 8″ / M 3 – M 180

Lengths: 1.1/2″ – 50″ / 40 mm – 4500mm

ANSI B16.5

ANSI B18.2.2.2

  • Fasteners according to customer drawing


  • Studbolts Alloy Steel
  • ASTM A193: B7, B7M, B16
  • ASTM A320: L7, L7M, L43
  • Nuts ASTM A194: 2H, 2HM, 4, 7, 7M
  • Studbolts Stainless Steel
  • ASTM A193/320:
  • B8, B8M, B8T, B8C, B8CL2, B8MCL2
  • ASTM A453: GRADE 660
  • Nuts ASTM A194: 8, 8M, 8T
  • Duplex 1.4462 – UNS 31803
  • Super Duplex 1.4501 – UNS 32760
  • Inconel, Incoloy, Hastelloy, Monel,
  • Titanium, Nimonic, 254SMO


  • Hot Dipped Galvanized
  • Electro Zinc Alloy Platings
  • Zinc-Flake coatings
  • Fluoropolymer coatings (PTFE)


EN-10204 type 2.1, 2.2, 3.1, 3.2, DOC, CE- marking, DOP, PED 97/23/ EC.

Inspection bodies

DNV, LIoyd’s Register of Shipping, ABS, TÜV, Germanischer LIoyd’s, Bureau Veritas, etc.