Studs

Specification Highlights:

• Types of Studs:

  • Full Threaded Studs – Threads run the entire length

  • Double End Studs – Threaded at both ends with unthreaded shank in the middle

  • Tap End Studs – One end for tapped hole, the other for nut

  • Continuous Thread Studs (Threaded Rods) – Used in long-length fastening

  • Flange Stud Bolts – Common in piping and pressure vessels

• Material Options:

  • Carbon steel

  • Alloy steel

  • Stainless steel (SS304, SS316, SS310)

  • Inconel, Monel, Hastelloy (for high-temp/corrosive environments)

  • Brass, Duplex, Super Duplex (for specialty use)

• Thread Types:

  • Metric: M6 to M100 (or larger)

  • Imperial: 1/4” to 4”

  • Coarse (UNC), Fine (UNF), or custom thread pitches

  • Threading standard: 6g/6H tolerance, Class 2A/2B

• Length Range:

  • Standard and custom lengths available

  • Typically from 25 mm to 3000 mm (or more)

• Finish / Coating:

  • Black oxide

  • Zinc plated (white/yellow)

  • Hot-dip galvanized

  • Teflon/PTFE coated

  • Plain/self-finish

  • Passivated (for stainless steel)

• Strength Grades:

  • ASTM A193 Grade B7, B8, B16

  • ASTM A320, A307

  • ISO 898: Class 4.6, 8.8, 10.9, 12.9

• Standards Compliance:

  • ASTM, DIN 975/976, ISO 898-1, ASME B18.31.2, BS, IS

• Applications:

  • Petrochemical and refinery piping

  • Engines and turbines

  • Flange connections

  • Heavy machinery and equipment

  • Steel structures and pressure vessels

• Key Features:

  • High tensile and shear strength

  • Allows easy assembly/disassembly

  • Ideal for high-temperature and high-pressure environments

  • Available in corrosion- and heat-resistant alloys

  • Precise dimensional control for critical applications