Monel 400 Fully threaded stud & nut sets
ASME B18.31.2ASTM B164
A Monel 400 stud-and-nut set brings nickel–copper corrosion resistance in seawater and selected chemicals to the complete threaded connection. The stud and two nuts retain separate material conditions, thread checks and lot identities within one BOM.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Annealed
EN 10204 3.1 MTC + heat-number traceability
Which standard is on your order?
Raw Material Specifications
Finished-Component Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
Annealed; cold worked for higher strengthAnnealing restores ductility after working, while the specified amount of cold work sets higher-strength conditions without aging.
What we can make in Monel 400
Stud
Finished stud length covers the flange stack, gasket and both nut engagements. Full-length thread permits nut positioning from either end for cover removal and flange assembly.
Nuts
Match nut thread class and proof-load requirements to the stud. Regular and heavy-hex patterns need different socket clearances and bearing footprints around the flange holes.
- Grade pairing
- Stud + two nuts
- Grade pairing
- Metric · UNC · UNF · 8UN · UNJ
- Grade pairing
- Component-by-component grades
- Grade pairing
- Heat and batch identification
- Final condition
- Annealed · Cold worked
- Inspection
- Component count · Mating thread fit · Individual dimensions
Manufacturing route
Studs, nuts and washers are manufactured and inspected as separate components before the specified quantities are packed as a set.
Heat treatment & final condition
The final annealed or specified strengthened condition is linked to the lot; an aging treatment is not assumed for a solid-solution alloy.
Finished geometry
Thread engagement, nut pattern and component grades are checked together. Each component retains its heat or batch identity in the set documentation.
Where 400 fits — and what matters
Offshore & Marine
Seawater pump and cooling-system coversMonel 400 fully threaded stud & nut sets supply the stud and two mating nuts for seawater pump and cooling-system covers as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. The assembled contact is exposed to saltwater, deposits and neighbouring metals.
Water Treatment & Desalination
Filter housings and treatment-pump coversMonel 400 fully threaded stud & nut sets supply the stud and two mating nuts for filter housings and treatment-pump covers as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. The water stream, cleaning cycle and retained liquid define exposure at the installed part.
Oil & Gas
Process valves and equipment closuresMonel 400 fully threaded stud & nut sets supply the stud and two mating nuts for process valves and equipment closures as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. Utility connections and pressure-boundary parts have separate acceptance requirements on the equipment drawing.
Same stud & nut set. Different material priorities.
Monel 400 material dataInconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Preload shared by the stud and its mating nuts
- Annealed or solution-annealed 625
- The delivery condition affects strength and high-temperature response. Keep the specified condition with the component’s mechanical acceptance; 718-style aging is not the strengthening route for 625. Include liquid retained at the stud threads, two nut engagements and bearing seats in the exposure description.
Super Duplex 2507
Super-duplex strength and resistance to chloride pitting.
- Connection priority
- Preload shared by the stud and its mating nuts
- Final duplex structure
- S32750 chemistry and final solution treatment belong together. Forming, section size and cooling affect the structure represented by the mechanical and corrosion records. Include liquid retained at the stud threads, two nut engagements and bearing seats in the exposure description.
Monel K-500
Age-hardened strength in the nickel–copper alloy family.
- Connection priority
- Preload shared by the stud and its mating nuts
- Strength and hydrogen exposure
- K-500 gains strength through aging. Cathodic protection, hydrogen exposure and the ordered condition need joint consideration in highly loaded marine components. Include liquid retained at the stud threads, two nut engagements and bearing seats in the exposure description.
From drawing to documented delivery
- 01Drawing & BOMForm, dimensions and quantity
- 02Material & formingGrade, heat and manufacturing route
- 03Final inspectionGeometry, threads and ordered tests
- 04Documents & dispatchLot records and identified packing
Order documents
- Material identity
- UNS N04400 · heat number · ordered condition
- Final-part acceptance
- Grade chemistry, supplied condition and ordered mechanical requirements.
- Dimensional record
- Component count · Mating thread fit · Individual dimensions
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Matching Kit
Flange Stud Bolt Kits
Build your 400 stud & nut set enquiry
Questions about 400 fully threaded stud & nut sets
What makes a set traceable rather than simply bagged together?
The stud and each nut lot retain their material and production identities. Component counts, mating thread checks and final conditions are recorded against the set’s BOM.