Incoloy 925 Double-End Studs
ASME B18.31.2 · DIN 938 / 939Project material specification — UNS N09925
Incoloy 925 double-end studs for specified sour-service bonnets and equipment closures, combining aged strength with independently machined end threads.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution treated and aged
EN 10204 3.1 MTC + heat-number traceability
Incoloy 925 in this connection
Age-hardenable nickel alloy combines strength with corrosion resistance for specified sour-service equipment.
- Connection
- Wellhead accessory & pressure-equipment closures
- Critical dimensions
- Overall length · central grip · each end length and fit
Which standard is on your order?
Raw Material Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
Solution treated and agedSolution treatment prepares the alloy for controlled precipitation aging, which develops the strength of the ordered condition.
What we can make in Alloy 925
Forms & dimension guide
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.
- Product forms
- Equal threaded ends · Unequal threaded ends · Tap-end — specified fit
- Dimensional control
- Overall length · central grip · each end length and fit
- Manufacturing
- CNC-turn the central grip and shoulders, then produce the two thread ends to their separate lengths and fits.
- Final condition
- Solution treatment and aging target the project strength and hardness limits.
- Inspection
- Heat-treatment lot · tensile / hardness · project sour-service qualification
Where 925 fits — and what matters
Oil & Gas
Process valves and equipment closuresIncoloy 925 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.
Pumps, Valves & OEM
Pump casings and valve bonnetsIncoloy 925 double-end studs connect pump casings and valve bonnets through a threaded body end and an accessible nut end. The plain shank spans the cover grip. Repeated maintenance makes fit, engagement and access part of the component specification.
Offshore & Marine
Seawater pump and cooling-system coversIncoloy 925 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.
Same double-end stud. Different material priorities.
Incoloy 925 material dataInconel 718
Precipitation hardening gives 718 its high strength; its specified condition is central to loaded and hot-service joints.
Inconel 718 Double-End StudsMonel K-500
Nickel-copper corrosion resistance is combined with precipitation-hardened strength for loaded marine and pump components.
Monel K-500 Double-End StudsInconel 625
Molybdenum and niobium provide solid-solution strength, combined with resistance to chloride pitting and crevice corrosion.
Inconel 625 Double-End StudsFrom drawing to documented delivery
- 01Drawing & BOMGrade, condition and part dimensions
- 02Sample lotOptional · typically ~20 days
- 03Production & testingTypically 25–35 days
- 04Documents & dispatchHeat-linked lots and packing
Connection & acceptance
Wellhead accessory & pressure-equipment closures: H₂S partial pressure · pH · temperature · hardness.
Material & final condition
Solution treatment and aging target the project strength and hardness limits.
Connection inspection
Overall length · central grip · each end length and fit. Heat-treatment lot · tensile / hardness · project sour-service qualification.
Build your 925 double-end stud enquiry
Upload drawing insteadQuestions about 925 double-end studs
What defines the 925 sour-service requirement?
The purchase specification ties alloy condition and hardness to the operating environment and applicable ISO 15156 / NACE requirements. The drawing then defines the independent thread fits and engagement at each end.
Technical references & photo credits
Catalogue photography shows product form. Application examples connect alloy properties to equipment duties; they are not customer installation records. Quantities, schedules and the inspection scope are confirmed in the quotation.