Our comprehensive range of Industrial Fasteners is engineered to provide the critical clamping force required for high-pressure piping, pressure vessels, and heavy-duty structural engineering.
We supply a massive inventory of bolting components, including full-thread Stud Bolts, Heavy Hex Bolts, and specialized U-Bolts. Our material expertise covers high-tensile Alloy Steel (B7/B16) for power plants, Low-Temperature Steel (L7) for cryogenic service, and Austenitic Stainless Steel (B8/B8M) for chemical resistance. For extreme offshore environments, we provide Duplex 2205, Super Duplex 2507, and the elite SMO 254 fasteners designed to resist chloride-induced stress corrosion.
Strictly compliant with ASTM A193, A194, and DIN 933/934 standards, our fasteners feature precision-rolled threads in UNC, UNF, and Metric profiles. To ensure long-term durability in corrosive zones, we offer advanced surface treatments including Hot-Dip Galvanizing, Zinc Plating, and Xylan (PTFE) Coating. Every batch is rigorously tested for hardness, tensile strength, and thread accuracy to ensure zero-failure performance under mechanical stress.
| Specification | Technical Details |
|---|---|
| Material Grades |
Alloy Steel: ASTM A193 B7, B7M, B16; ASTM A320 L7, L7M, L43 Stainless Steel: B8 (304), B8M (316), B8T (321), B8C (347), 904L, 310, 410 Duplex & Super Duplex: UNS S31803, S32205 (F51), S32750 (F53), S32760 (F55) Super Alloys: SMO 254, Monel 400, Inconel 625, Hastelloy C276, Alloy 20 High Tensile: Grade 8.8, 10.9, 12.9 |
| Fastener Types | Stud Bolts (Full Thread/Tap End), Hex Bolts, Heavy Hex Bolts, Socket Head Cap Screws, Heavy Hex Nuts, Nyloc Nuts, Plain Washers, Spring Washers, U-Bolts, J-Bolts, Anchor Bolts |
| Size Range |
Diameter: M6 to M100 | 1/4" to 4" Diameter Length: Up to 5 Meters (Custom lengths available on request) |
| Thread Profiles | UNC (Unified Coarse), UNF (Unified Fine), BSW (British Standard Whitworth), Metric Coarse & Fine, 8-Thread Series (8UN) |
| Nut Standards | ASTM A194 Grade 2H, 2HM, 4, 7, 7M, 8, 8M, 8T, 8C, Grade 16 |
| Manufacturing Standards | ASME B18.2.1, B18.2.2, B18.3, DIN 931, DIN 933, DIN 934, DIN 975, ISO 4014, ISO 4017 |
| Surface Coatings | Bare/Plain, Hot-Dip Galvanized (HDG), Zinc Plating (Blue/Yellow), PTFE (Xylan 1014/1424), Cadmium Plating, Nickel Plating, Electropolished, Black Oxide |
| Testing & QA | Tensile Strength Test, Proof Load Test, Hardness Testing (Rockwell/Brinell), PMI Analysis, Salt Spray Test (for coatings), Charpy V-Notch Impact Test (for L7) |
| Value Added Services | Custom CNC Machining, Precision Thread Rolling, Cut-to-length Studs, Color-Coded Identification, Third Party Inspection (TPI), Mill Test Certificates (EN 10204 3.1) |
| Material Category | Standard / Specification | Available Material Grades |
|---|---|---|
| Stainless Steel Flanges | ASTM A182 / ASME SA182 | F304, F304L, F304H, F316, F316L, F316Ti, F317L, F321, F310, F347, F904L |
| Duplex & Super Duplex | ASTM A182 / F51-F60 | F51 (S31803), F60 (S32205), F53 (S32750), F55 (S32760) |
| Super Alloys / 6-Moly | ASTM A182 / B564 | F44 (SMO 254), Monel 400 (N04400), Inconel 625 (N06625) |
| ASTM B462 / B564 | Hastelloy C276, Hastelloy C22, Alloy 20 (N08020), Incoloy 825 | |
| Statinless Steel Flanges | ASTM A105 / A350 | A105 (Standard), LF2 Class 1 & 2 (Low Temp), LF3 |
| ASTM A694 (High Yield) | F42, F46, F52, F56, F60, F65, F70 | |
| Alloy Steel Flanges | ASTM A182 / ASME SA182 | F1, F5, F9, F11 Class 1/2, F12, F22 Class 1/3, F91 |
| Dimensional Standards | ASME / API / DIN / EN | ASME B16.5, B16.47 (Ser. A & B), API 6A, MSS-SP-44, EN 1092-1, DIN 2527-2638 |
Dhanavir Steel is a premier stockholder and global supplier of high-performance Stainless Steel, Special Alloys and Nickel Alloys.
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Dhanavir Steel provides end-to-end industrial steel solutions, specializing in Pipes, Fittings, and Flanges. We combine technical expertise in NACE and IBR testing with a robust global supply chain to deliver quality-assured materials for demanding environments.
Dhanavir Steel provides end-to-end industrial steel solutions, specializing in Pipes, Fittings, and Flanges. We combine technical expertise in NACE and IBR testing with a robust global supply chain to deliver quality-assured materials for demanding environments.