Precision-engineered bolts, studs, nuts, washers, and custom CNC components manufactured in over 200 exotic and corrosion-resistant alloys for high-stress applications.
TorqBolt integrates hot forging, automated cold heading, and high-precision CNC machining lines to produce fasteners compliant with ASME, ASTM, DIN, ISO, and project-specific drawing requirements. Each item is matched to severe operating parameters including cryogenic exposure, high pressure, and hostile acid or marine environments.
Heavy hex bolts, engineered machine bolts, and fully threaded tap bolts. Heads are hot forged with unbroken metallurgical grain flow for maximum fatigue resistance in high-pressure piping assemblies.
All-thread stud bolts, tap-end studs, and double-end engineered studs designed for ASME B16.5 and B16.47 pressure flanges, heat exchangers, and subsea Christmas tree installations.
Precision hot forged and tapped hex nuts, jam nuts, and prevailing torque lock nuts. Hardness is metallurgically regulated to eliminate galling against high-tensile mating bolts and stud threads.
Flat washers, through-hardened washers, Belleville conical disc springs, and spherical washers designed to distribute preload forces and prevent relaxation across thermal cycling extremes.
High-tensile internal hex drive fasteners for compact equipment configurations, turbine casings, and subsea pumps. Available with deep broached sockets and radius runout thread roots.
Made-to-order high integrity components including forged sealing rings, eye bolts, anchor J-bolts, U-bolts, and CNC-turned custom shafts manufactured to strict client mechanical drawings.
Fastener integrity depends fundamentally on alloy selection. TorqBolt maintains bonded raw material stock directly sourced from European and premier international mills, ensuring verified chemical purity, precise heat treatments, and strict conformance to critical industrial specifications.
Review standard dimensional parameters, thread profiles, and compliance frameworks available across our manufacturing plant. Specialized client drawings and non-standard thread pitches are fully supported.
| Product Group | Applicable Standards | Size Range (Metric) | Size Range (Imperial) | Thread Configurations | Standard Material Specs |
|---|---|---|---|---|---|
| Heavy Hex Bolts | ASME B18.2.1, DIN 931, ISO 4014 | M12 – M120 | 1/2" – 4.0" | UNC, UNF, 8UN, Metric Coarse | ASTM A193 B8/B8M, B16, B637 (718), B446 (625) |
| Flange Stud Bolts | ASTM A193, ASTM A320, DIN 976 | M10 – M150 | 3/8" – 6.0" | Full Thread, Double End, 8UN Continuous | ASTM A193 B7/B8/B8M, A479 Duplex, B574 (C276) |
| Heavy Hex Nuts | ASME B18.2.2, ASTM A194, DIN 934 | M10 – M130 | 3/8" – 5.0" | UNC, UNF, 8UN, Class 6H / 2B Fit | ASTM A194 Gr 8/8M, Gr 4, Gr 7, Monel 400, Ti Gr 5 |
| Socket Cap Screws | ASME B18.3, DIN 912, ISO 4762 | M4 – M64 | #10 – 2.5" | Hex Socket, Torx, Class 6g / 3A Fit | ASTM A564 (17-4 PH), Inconel 718, Alloy 2205 |
| Precision Washers | ASTM F436, DIN 125, ISO 7089 | M6 – M150 | 1/4" – 6.0" | Flat, Belleville Conical, Spherical | Inconel 718 Age Hardened, Hastelloy, Monel K-500 |
| Engineered Rings / U-Bolts | DIN 3570, ASME B18.31.5, Custom | M12 – M160 | 1/2" – 6.0" | Rolled or Cut Thread to Drawing | Super Duplex 2507, Cu-Ni 70/30, Incoloy 825 |
*Custom pitch, left-hand threading, non-standard shank lengths, and modified hex widths are precision-machined in accordance with customer approved drawings.
Managing the deformation kinetics and work-hardening rates of nickel superalloys and duplex steels requires specialized machinery and strict temperature controls. Our Rajkot plant combines modern forging and machining equipment with in-house metallurgical testing.
Microprocessor-controlled induction heating prevents overheating and localized grain growth, producing structural bolt heads with unbroken grain structure and high fatigue thresholds.
High-efficiency multi-station cold heading machinery engineered for high-volume standard runs in austenitic stainless and titanium, guaranteeing tight dimensional repeatability.
Threads are formed through cold plastic deformation rather than cutting, yielding compressive surface residual stresses and eliminating notch sensitivity across critical root radii.
Precision turning and milling from certified bar stock for low-volume orders, non-standard thread pitches, complex flanged nuts, and tight-tolerance custom components.
Every batch processed through our Rajkot manufacturing plant undergoes rigorous mechanical and non-destructive examination. Shipments are supplied with certified EN 10204 Type 3.1 Mill Test Reports with complete heat-number correlation. Third-party inspection witness testing (EN 10204 3.2) can be coordinated with independent agencies including DNV, Bureau Veritas, Lloyd's Register, ABS, and TÜV Rheinland.
Key information regarding international logistics, material verification, minimum order quantities, and project certifications.
Request our comprehensive engineering handbook containing complete dimensional charts, alloy chemistry matrices, mechanical stress tables, and torque tightening guides for procurement teams and project engineers.