Incoloy 925 Stud Bolts
ASME B18.31.2
Incoloy 925 stud bolts bring age-hardened strength combined with process-corrosion resistance to flange and cover joints. The stud condition, mating nuts and end form determine how the assembly carries and retains clamp load.
- 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
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
Fully threaded
Two nuts clamp the flange or cover; usable thread length spans the assembled grip.
Double-end
A plain centre spans the grip, with a threaded portion at each end for the nuts.
Tap-end
One end engages a tapped casing; the exposed end accepts the cover nut.
- Threads
- Metric · UNC · UNF · 8UN · UNJ
- Forms
- Continuous thread · Double-end · Tap-end
- Final condition
- Solution treated and aged
- Inspection
- Thread size and fit; overall and effective thread length; end geometry; lot identification.
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
Solution treatment and the specified aging condition are recorded against the production lot; final dimensions are checked after thermal processing.
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 925 fits — and what matters
Offshore & Marine
Seawater pump and cooling-system coversIncoloy 925 stud bolts & threaded rods clamp seawater pump and cooling-system covers with nuts on the exposed ends, keeping the stud in place when a cover is removed. The assembled contact is exposed to saltwater, deposits and neighbouring metals.
Water Treatment & Desalination
Filter housings and treatment-pump coversIncoloy 925 stud bolts & threaded rods clamp filter housings and treatment-pump covers with nuts on the exposed ends, keeping the stud in place when a cover is removed. The water stream, cleaning cycle and retained liquid define exposure at the installed part.
Oil & Gas
Process valves and equipment closuresIncoloy 925 stud bolts & threaded rods clamp process valves and equipment closures with nuts on the exposed ends, keeping the stud in place when a cover is removed. Utility connections and pressure-boundary parts have separate acceptance requirements on the equipment drawing.
Same stud. Different material priorities.
Incoloy 925 material dataInconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Stud tension and clamp-load retention
- 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 exposed thread roots and nut-bearing faces in the exposure description.
Super Duplex 2507
Super-duplex strength and resistance to chloride pitting.
- Connection priority
- Stud tension and clamp-load retention
- 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 exposed thread roots and nut-bearing faces in the exposure description.
Monel K-500
Age-hardened strength in the nickel–copper alloy family.
- Connection priority
- Stud tension and clamp-load retention
- 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 exposed thread roots and nut-bearing faces 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 N09925 · heat number · ordered condition
- Final-part acceptance
- Lot-linked aging record and mechanical acceptance in the final condition.
- Dimensional record
- Thread size and fit; overall and effective thread length; end geometry; lot identification.
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Matching Kit
Flange Stud Bolt Kits
Build your 925 stud enquiry
Questions about 925 stud bolts & threaded rods
Does changing the stud alloy also change the nut selection?
The nut needs compatible internal threads, sufficient engaged height and a specified material condition. Select lubricant or surface treatment with the stud–nut pair, because assembly friction affects the preload obtained from tightening.