Nickel Alloy Hex Nuts
| Standard | DIN 934 · ISO 4032 · ASTM F467 |
|---|---|
| Material | Inconel 625 / Inconel 718 |
| Strength Grade | Alloy 625 / Alloy 718 |
| Size Range | M8-M48 |
| Surface Treatment | Pickled / Passivated |
01
Product Description
Product Description & Key Specifications
Nickel alloy hex nuts are specified for bolting assemblies exposed to severe corrosion, high temperature, offshore environments and chemical processing conditions. This product range includes Inconel 625 and Inconel 718 nuts to ASTM F467 with ISO 4032 / DIN 934 dimensional references in M8-M48 sizes.
Alloy 625 nuts are commonly chosen for chloride, seawater, sour service review and chemical corrosion resistance. Alloy 718 nuts are selected when higher strength and elevated-temperature capability are specified. The nut alloy, thread fit and certificate scope should match the stud bolt and washer requirements.
Pickled and passivated finish helps provide a clean nickel alloy surface after manufacturing. For critical oil and gas, offshore wind or high-temperature equipment orders, RFQs should confirm alloy, thread, dimensions, PMI, MTC, heat traceability, NACE or project specification requirements and matching hardware.
| Product type | Nickel alloy hex nuts / Inconel hex nuts |
|---|---|
| Standards | ASTM F467 / ISO 4032 / DIN 934 |
| Material | Inconel 625 / Inconel 718 |
| Strength grade | Alloy 625 / Alloy 718 |
| Size range | M8-M48 |
| Common models | M8, M10, M12, M16, M20, M24, M30, M36, M42, M48 |
| Thread type | Metric thread by ISO / DIN or project drawing |
| Surface finish | Pickled / Passivated |
| Matched hardware | Nickel alloy stud bolts and nickel alloy flat washers |
| Documentation | MTC, PMI, CoC, thread inspection and dimensional report on request |
Dimensions & SpecificationsDIN 934 / ISO 4032
Technical Drawing
Dimensional Table
| Parameter | M1 | M1.2 | M1.4 | M1.6 | M2 | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | 0.25 | 0.25 | 0.3 | 0.35 | 0.4 | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1 | 1|1.25 | 1|1.25|1.5 | 1.25|1.5|1.75 | 1.5|2 | 1.5|2 |
| e/min | 2.71 | 3.28 | 3.28 | 3.41 | 4.32 | 5.45 | 6.01 | 6.58 | 7.66 | 8.79 | 11.05 | 12.12 | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 |
| k/max | 0.8 | 1 | 1.2 | 1.3 | 1.6 | 2 | 2.4 | 2.8 | 3.2 | 4 | 5 | 5.5 | 6.5 | 8 | 10 | 11 | 13 |
| k/min | 0.55 | 0.75 | 0.95 | 1.05 | 1.35 | 1.75 | 2.15 | 2.55 | 2.9 | 3.7 | 4.7 | 5.2 | 6.14 | 7.64 | 9.64 | 10.3 | 12.3 |
| s/max | 2.5 | 3 | 3 | 3.2 | 4 | 5 | 5.5 | 6 | 7 | 8 | 10 | 11 | 13 | 17 | 19 | 22 | 24 |
| s/min | 2.4 | 2.9 | 2.9 | 3.02 | 3.82 | 4.82 | 5.32 | 5.82 | 6.78 | 7.78 | 9.78 | 10.73 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 |
Engineering references
Technical resources
Review the applicable dimensions, drawing and standard relationship before confirming the ordered specification.02
Selection
Selection Advantages by Application
Oil, Gas and Offshore Flange Bolting
Inconel 625 / 718 nuts are used with nickel alloy studs in offshore, valve, flange and process equipment where corrosion resistance and heat traceability are critical.
Oil and gas fastenersHigh-Temperature Power Equipment
Alloy 718 nuts can be specified for elevated-temperature equipment and power generation assemblies when higher nickel alloy strength is required by the project.
Power generation fastenersMarine Renewable and Corrosion-Resistant Structures
Nickel alloy nuts support offshore wind auxiliaries, marine renewable equipment and chloride-exposed structures where stainless steel may not meet corrosion requirements.
Renewable energy fasteners03
Assembly
Recommended Matching Products
04
Manufacturing
Manufacturing & Quality Control
Manufacturing CapabilityQuality Control
Machining or forging of nickel alloy nut blanks by size and quantityInconel 625 / 718 material certificate and heat number verification
Thread tapping to ASTM / ISO / DIN or drawing requirementThread gauge, across-flat, height and dimensional inspection
Pickling and passivation for nickel alloy surface conditionSurface cleanliness, visual inspection and PMI support when specified
Nut supply alone or kitted with nickel alloy studs and washersAlloy matching, thread fit and package traceability checks
Export packaging by alloy, heat, size and lotMTC, PMI, CoC and inspection reports prepared on request
05
FAQ
Common Questions Before RFQ
What are Inconel hex nuts used for?
They are used in severe corrosion, offshore, chemical and high-temperature bolting assemblies where matching nickel alloy hardware is required.
Which standard applies to nickel alloy nuts?
ASTM F467 is commonly used for nonferrous nuts, while ISO 4032 and DIN 934 may be used as dimensional references for metric hex nuts.
Should I choose Inconel 625 or Inconel 718?
Inconel 625 is often selected for corrosion resistance, while Inconel 718 is selected for higher strength and elevated-temperature applications. Follow the project material specification.
Can PMI and MTC be supplied?
Yes. PMI, material test certificates, CoC and dimensional inspection reports can be supplied when required.
Can matching studs and washers be supplied?
Yes. Nickel alloy nuts can be supplied with matching Inconel stud bolts and flat washers by alloy, size and certificate requirement.
Need Inconel hex nuts for severe service bolting?
Send alloy, size, thread, standard, finish, quantity, matching stud/washer needs and certificate scope. We can quote Inconel 625 / 718 hex nuts for offshore, oil and gas and high-temperature equipment.
Request a Quote
Get engineering support and pricing for this product — our team responds within 24 hours.