Engineered for mission-critical applications across oil & gas refineries, petrochemical plants, offshore platforms, power plants, and heavy engineering projects worldwide.
Full spectrum of heavy hex bolts, flange bolts, anchor bolts, and carriage bolts. Available in high-tensile carbon steel, stainless steel, and high-nickel alloys with precise thread tolerances.
Forged heavy hex nuts, nylon lock nuts, and coupling nuts designed to withstand extreme torque, high pressure, and thermal cycling in high-stress flanged connections.
Continuous fully-threaded rods and custom tie rods cut to exact lengths. Threaded to metric and imperial standards with defect-free thread engagement.
Socket head cap screws, set screws, machine screws, and custom countersunk screws crafted for high-precision mechanical assemblies and rotating machinery.
Plain flat washers, spring lock washers, heavy-duty structural washers, and spherical washers that guarantee uniform load distribution and prevent joint loosening.
Double-end and continuous full-thread stud bolts for pipeline flanges, pressure vessels, and valves. Thread-rolled for enhanced fatigue resistance and surface finish.
Fluoropolymer, PTFE, hot-dip galvanized, and cadmium-plated fasteners specifically treated to halt galvanic corrosion and chemical degradation in marine environments.
Stud Bolt India operates state-of-the-art hot forging, CNC machining, thread rolling, and heat treatment facilities in Mumbai. Our complete range of industrial fasteners meets stringent international specifications to guarantee structural integrity under harsh service conditions.
100% heat-number stamp tracking on every fastener lot.
Spectro PMI analysis, tensile testing, and hardness verification.
Machined precisely to client engineering drawings and datasheets.
ISPM-15 compliant wooden boxes and seaworthy wrapping.
Comprehensive technical guidance for procurement officers, piping engineers, and project QA/QC teams.
| Fastener Category | Dimensional Standards | Material Grades & Specifications | Size & Thread Range |
|---|---|---|---|
| Heavy Hex & Standard Bolts | ASME B18.2.1, DIN 931, DIN 933, ISO 4014/4017 | ASTM A193 B7/B7M/B16, SS 304/316/321, Property Class 8.8, 10.9, 12.9 | M6 to M100 / 1/4" to 4" (UNC, UNF, Metric Pitch) |
| Industrial Nuts | ASME B18.2.2, DIN 934, ISO 4032 | ASTM A194 Gr 2H, 2HM, 4, 7, 8, 8M, 8T; Duplex 2205, Super Duplex 2507 | M6 to M100 / 1/4" to 4" |
| Stud Bolts & Threaded Rods | ASME B18.31.2, ASME B16.5, DIN 975/976 | ASTM A193 B7/B8/B8M, ASTM A320 L7/L43, Inconel 625/718, Monel 400 | M6 to M120 / 1/4" to 4.5" (Lengths up to 6 meters) |
| Structural & Flat Washers | ASME B18.21.1, DIN 125, DIN 127, DIN 6916 | ASTM F436 Type 1/3, Stainless Steel 304/316L, High-Nickel Alloys | M3 to M100 / 1/8" to 4" |
| Socket Head Cap Screws | DIN 912, ISO 4762, ASME B18.3 | Alloy Steel 12.9, SS 316, Titanium Gr 2/Gr 5, Hastelloy C276 | M4 to M64 / #6 to 2.5" |
* Non-standard sizes, pitch combinations, and special material grades are manufactured on demand.