Caliper Overseas is a trusted Super Duplex Steel Fasteners Manufacturer and Supplier in India, providing world-class products with specifications like ASTM A479, ASME SA479, DIN, ISO, and EN. Super Duplex Steel Fasteners are superior performing parts made from a superior grade quality of stainless steel that has optimum corrosion resistance with remarkable strength. We also have different types including bolts, nuts, and washers. They are extensively applied in demanding industries where stress corrosion cracking resistance and durability are critical.
Our fasteners are ideal for use in marine, chemical, oil & gas, and offshore applications due to their superior resistance to pitting and crevice corrosion. It provides high tensile strength, extended service life and superior mechanical performance in extreme conditions. Be it industrial assembly or structural construction, these fasteners provide top-notch reliability. For premium quality and long-lasting Super Duplex Steel Fasteners, reach us today to discover the best solution for your project requirements.

| Standard | ASTM A182 / ASME SA182 |
| Bolt / Screw Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Nuts Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Washers Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Machine Screws Size | M1.6 – M12 |
| Self Tapping Screw Size | No.2 – No. 14 |
| Length | 3 mm to 200 mm |
| Threads | UNF, BSW, BSF, METRIC, UNC, or as required |
| Fasteners |
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| Form | Hex, Threading, Square, Round as per Gauge Etc. |
| Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Certification | Dual Certified As per ASTM & ASME Codes |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Threads | Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically |
| Test Certificate | as per EN 10204 / 3.1 Manufacturer Test Certificate |
| Additional Certifications | PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
| Production Process | M24-M100: hot forging , M2-M24: Cold Froging, for custom-made connecting element machining and CNC |
| Types | Bolts, Nuts, Stud Bolts, Washers, Threaded Rod, Anchor Fasteners, Eye Bolt, Stud, Cotter Pin, Socket Screw, Fine Fasteners & Spares, Foundation Fasteners, Hexagon Castle Nuts, Hexagon Domed Cap Bolts, Hexagon Thin Nuts etc. |
Super Duplex Steel Fasteners in Distillery Plants
Super Duplex Steel Fasteners in Sugar Industries
Super Duplex Steel Fasteners in Process Industries
Super Duplex Steel Fasteners in Power Plants
Super Duplex Steel Fasteners in Refineries
Super Duplex Steel Fasteners in Petrochemical Plants
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