Inconel 625 Stud & Nut Sets
ASME B18.31.2 · ASME B18.2.2ASTM B446 — rod / bar
Inconel 625 stud and nut sets for chloride-exposed flange connections, supplied as matched line items with the stud condition, nut pattern and inspection records identified.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Annealed / solution annealed
EN 10204 3.1 MTC + heat-number traceability
Inconel 625 in this connection
Molybdenum and niobium provide solid-solution strength, combined with resistance to chloride pitting and crevice corrosion.
- Connection
- Seawater-system flanges & offshore closures
- Critical dimensions
- Stud length · nut pattern · external / internal thread fit
Which standard is on your order?
Raw Material Specifications
Finished-Component Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
Annealed or solution annealedFor B446 stock, Grade 1 is annealed and Grade 2 is solution annealed; the higher-temperature solution treatment supports creep resistance rather than age hardening.
What we can make in Alloy 625
Forms & dimension guide
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.
- Product forms
- Full-thread stud + 2 nuts · Stud + 2 nuts + washers
- Dimensional control
- Stud length · nut pattern · external / internal thread fit
- Manufacturing
- Machine and thread the stud; manufacture mating nuts to their own pattern and thread class. Inspect each component before packing by set.
- Final condition
- Annealing or solution annealing follows the ordered B446 grade and finished-fastener requirements.
- Inspection
- Heat traceability · final condition · finished-part mechanical and dimensional records
Where 625 fits — and what matters
Offshore & Marine
Seawater pump and cooling-system coversInconel 625 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.
Oil & Gas
Process valves and equipment closuresInconel 625 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.
Renewable Energy
Thermal-system pumps and equipment closuresInconel 625 fully threaded stud & nut sets supply the stud and two mating nuts for thermal-system pumps and equipment closures as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. The specified heat or liquid exposure is applied to the actual mounting position.
Water Treatment & Desalination
Filter housings and treatment-pump coversInconel 625 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.
Same stud & nut set. Different material priorities.
Inconel 625 material dataInconel 718
Precipitation hardening gives 718 its high strength; its specified condition is central to loaded and hot-service joints.
Inconel 718 Stud & Nut SetsHastelloy C-276
A nickel-chromium-molybdenum-tungsten alloy for severe process corrosion, including reducing acids and wet-chlorine environments.
Hastelloy C-276 Stud & Nut SetsSuper Duplex 2507
High chromium, molybdenum and nitrogen support resistance to chloride pitting, alongside high duplex-stainless strength.
Super Duplex 2507 Stud & Nut SetsMonel K-500
Nickel-copper corrosion resistance is combined with precipitation-hardened strength for loaded marine and pump components.
Monel K-500 Stud & Nut SetsFrom 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
Seawater-system flanges & offshore closures: Seawater temperature · crevices · cathodic protection.
Material & final condition
Annealing or solution annealing follows the ordered B446 grade and finished-fastener requirements.
Connection inspection
Stud length · nut pattern · external / internal thread fit. Heat traceability · final condition · finished-part mechanical and dimensional records.
Matching Kit
Flange Stud Bolt Kits
Build your 625 stud & nut set enquiry
Upload drawing insteadQuestions about 625 fully threaded stud & nut sets
Are the stud and nut certificates interchangeable?
Each component retains its heat identity and specified acceptance. The set packing list connects the stud and nuts to one BOM line without treating a bar certificate as proof of nut performance.
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.