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Inconel 601 Nuts are engineered for fastening systems exposed to extreme heat, oxidation, and chemically aggressive environments where conventional stainless steel fasteners fail. Manufactured from a nickel-chromium-iron alloy with aluminum additions, these nuts maintain mechanical stability in temperatures exceeding standard industrial limits while resisting scaling and carburization. They are widely used in aerospace assemblies, petrochemical plants, heat treatment equipment, and power generation systems where long-term reliability is critical.
| Parameter | Specification / Range |
|---|---|
| Material | Inconel 601 (Nickel-Chromium-Iron Alloy with Aluminum) |
| Grade Options | UNS N06601 |
| Size Range | M3 to M64 / 1/8" to 2-1/2" |
| Thread Type | Metric (ISO), UNC, UNF |
| Standards | ASTM F467, ASME SB166, DIN 934 equivalent |
| Surface Finish | Bright, Pickled, Passivated |
| Type Variants | Hex Nuts, Heavy Hex Nuts, Lock Nuts |
| Hardness | Annealed condition, controlled hardness as per ASTM standards |
| Grade | C | Mn | Si | Fe | S | Cr | Cu | Ni | |
| 601 | min. | – | – | – | Bal | – | 21.0 | – | 58.0 |
| max. | 0.10 | 1.0 | 0.5 | Bal | 0.015 | 25.0 | 1.0 | 63.0 | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 601 | Psi – 95,000 , MPa -655 | Psi – 45,000 , MPa – 310 | 40 | – | – |
| Grade | UNS No | Old British | Euronorm | GOST | Japanese JIS | ||
| BS | En | No | AFNOR | ||||
| Inconel 601 | N06601 | NA 49 | NiCr23Fe | 2.4851 | NC23FeA | XH60BT | NCF 601 |
| Size | Finished Hex | Heavy Hex | Finished Jam | Heavy Hex Jam | Square | Heavy Square |
| 1⁄2“ Nut | 3.75 | 6.54 | 2.62 | 4.00 | 5.78 | 7.87 |
| 5⁄8“ Nut | 7.33 | 11.9 | 4.93 | 6.96 | 10.8 | 14.3 |
| 3⁄4“ Nut | 11.9 | 19.3 | 7.70 | 11.0 | 15.4 | 23.5 |
| 7⁄8“ Nut | 19.0 | 29.7 | 12.0 | 16.7 | 24.5 | 36.2 |
| 1″ Nut | 28.3 | 42.5 | 17.6 | 23.5 | 36.3 | 51.5 |
| 11⁄8“ Nut | 40.3 | 59.2 | 24.7 | 32.4 | 52.5 | 72.4 |
| 11⁄4“ Nut | 54.3 | 78.6 | 36.1 | 45.8 | 70.6 | 95.5 |
| 13⁄8“ Nut | 73.0 | 102 | 47.9 | 59.3 | 94.5 | 125.0 |
| 11⁄2“ Nut | 94.3 | 131 | 60.9 | 74.8 | 122 | 161 |
| 15⁄8“ Nut | 162 | 91.6 | ||||
| 13⁄4“ Nut | 151 | 204 | 100 | 114 | ||
| 17⁄8“ Nut | 241 | 134 | ||||
| 2″ Nut | 224 | 299 | 140 | 165 | ||
| 21⁄4“ Nut | 419 | 227 | ||||
| 21⁄2“ Nut | 564 | 332 | ||||
| 23⁄4“ Nut | 738 | 429 | ||||
| 3″ Nut | 950 | 545 | ||||
| 31⁄4“ Nut | 1194 | 651 | ||||
| 31⁄2“ Nut | 1526 | 851 | ||||
| 33⁄4“ Nut | 1812 | 1005 | ||||
| 4″ Nut | 2180 | 1200 |
Inconel 601 Nuts are used in environments where high temperature, oxidation, and chemical exposure demand long-term fastening reliability.
Inconel 601 Nuts are manufactured using controlled hot forging and precision CNC machining processes to ensure dimensional consistency and mechanical reliability. Each batch undergoes strict inspection for thread accuracy, surface finish quality, and hardness compliance.
Quality assurance includes dimensional verification, tensile and load testing, and metallurgical inspection to confirm alloy composition integrity. Products are traceable through batch-level identification systems, ensuring full transparency from raw material to final dispatch.
KK Fasteners follows ISO 9001:2015-certified manufacturing protocols, ensuring every fastener meets international industrial standards. Additional compliance with RoHS and REACH supports global environmental and safety requirements for export markets.
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Inconel 601 Nuts are high-performance nickel-chromium alloy fasteners designed for extreme temperature and oxidation environments. They are used to secure bolted assemblies in furnaces, turbines, and chemical systems where conventional stainless steel fasteners cannot maintain structural integrity.
They are made from UNS N06601 nickel-chromium-iron alloy with controlled aluminum content. This composition enhances oxidation resistance and high-temperature stability, making them suitable for continuous service in elevated heat applications.
These nuts typically conform to ASTM F467 for nickel alloy nuts and may align with ASME SB166 for material specification. Equivalent DIN and ISO standards may apply depending on regional engineering requirements.
They are used in aerospace engines, petrochemical plants, heat treatment furnaces, and power generation systems. Their ability to withstand heat and corrosion makes them ideal for critical fastening applications in harsh environments.
Standard production lead times range from 2 to 6 weeks depending on size and customization requirements. Expedited production may be available for urgent industrial projects with prior scheduling.
Inconel 601 Nuts are critical for applications where thermal stability and corrosion resistance directly impact system safety and performance. With controlled manufacturing and global export capability, KK Fasteners supports industries that demand precision-engineered fastening solutions. For technical specifications, pricing, or custom requirements, connect with the engineering team at KK Fasteners to request a quote or detailed datasheet tailored to your application
