Monel 400 Double-end studs
ASME B18.31.2ASTM B164
A Monel 400 double-end stud leaves the installed end in the equipment body while the service nut is removed. Its nickel–copper corrosion resistance in seawater and selected chemicals must cover the trapped body-end interface as well as the exposed end.
- 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-Stud 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
Clamping stud
Use for through-bolted covers and housings with access to both nuts. The plain grip spans the joint; independently sized threaded ends accommodate unequal nut-side clearances.
Tap-end stud
Use on valve bonnets and machine housings opened repeatedly for maintenance. The insertion end remains in the body while the outer nut is removed, reducing repeated wear of the housing thread.
- Thread systems
- Metric · UNC · UNF · 8UN · UNJ
- Geometry
- Two threaded ends · Plain shank
- Assembly
- Nut-to-nut · Tap-end
- Final condition
- Annealed · Cold worked
- Inspection
- End thread lengths · Shank diameter · Thread gauging
Manufacturing route
CNC machining suits samples and special end forms. Repeat lots use cut-to-length stock with rolling or cutting selected for the ordered thread and material condition.
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
End lengths, runout and effective thread engagement are checked separately from overall length; tap ends are gauged to their own fit requirement.
Where 400 fits — and what matters
Offshore & Marine
Seawater pump and cooling-system coversMonel 400 double-end studs connect seawater pump and cooling-system covers through a threaded body end and an accessible nut end. The plain shank spans the cover grip. The assembled contact is exposed to saltwater, deposits and neighbouring metals.
Water Treatment & Desalination
Filter housings and treatment-pump coversMonel 400 double-end studs connect filter housings and treatment-pump covers through a threaded body end and an accessible nut end. The plain shank spans the cover grip. The water stream, cleaning cycle and retained liquid define exposure at the installed part.
Oil & Gas
Process valves and equipment closuresMonel 400 double-end studs connect process valves and equipment closures through a threaded body end and an accessible nut end. The plain shank spans the cover grip. Utility connections and pressure-boundary parts have separate acceptance requirements on the equipment drawing.
Same double-end stud. Different material priorities.
Monel 400 material dataInconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Tension through the grip and load transfer into the housing
- 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 body-end thread inside the tapped housing in the exposure description.
Super Duplex 2507
Super-duplex strength and resistance to chloride pitting.
- Connection priority
- Tension through the grip and load transfer into the housing
- 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 body-end thread inside the tapped housing in the exposure description.
Monel K-500
Age-hardened strength in the nickel–copper alloy family.
- Connection priority
- Tension through the grip and load transfer into the housing
- 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 body-end thread inside the tapped housing 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
- End thread lengths · Shank diameter · Thread gauging
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your 400 double-end stud enquiry
Questions about 400 double-end studs
Can both ends use the same thread designation?
They can, but the body end may require a different fit or engagement from the nut end. Record each end separately, including a different pitch or interference requirement where the equipment drawing uses one.