Crafted from high-quality bars, our studbolts and nuts come in plain, Mastercote PTFE coated, cadmium, zinc nickel plated, galvanized, and other specialized coatings, including electroless nickel plating.

Why Mastercote®?

✔ Unrivaled Corrosion Resistance – Outperforms traditional fluoropolymer coatings, ensuring long-term durability.

✔ Low Friction, Self-Lubricating – Reduces make-up and break-out torques, preventing galling.

✔ High-Temperature Stability – Withstands hydrogen sulfide exposure at 121°C (250°F) under 2,000 psi without degradation.

✔ Optimized for Offshore & Subsea Use – Ideal for extreme environments, ensuring joint integrity under dynamic loads.

Extensive Stock Availability

We maintain a comprehensive inventory of ASTM-certified fasteners, ready for immediate deployment:

• ASTM A193 – Imperial: 3/8” to 4” dia, Metric: M12 to M52
• ASTM A320 L7 – ½” to 4”
• ASTM A193 B16 – ½” to 4” dia
• ASTM A193/A320 B8 & B8M Class 1 & 2 – Stainless Steel (SS304 & SS316)

In-House Furnace Processing & Certification

We manufacture B7M/2HM and L7M/Gr 7M fasteners in-house. The components are then oiled, grit blasted, plated, or Mastercote finished, ensuring full traceability, rigorous testing, and compliance with international standards.