Hastelloy C-276 Stud & Nut Sets
ASME B18.31.2 · ASME B18.2.2ASTM B574 — rod / bar
Hastelloy C-276 stud and nut sets for severe process-chemical flange joints. Studs and mating nuts are quoted together so material, thread fit and component records stay aligned.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution annealed
EN 10204 3.1 MTC + heat-number traceability
Hastelloy C-276 in this connection
A nickel-chromium-molybdenum-tungsten alloy for severe process corrosion, including reducing acids and wet-chlorine environments.
- Connection
- Acid reactor nozzles & chemical piping flanges
- 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
Solution annealedSolution annealing dissolves detrimental precipitates, followed by rapid cooling to preserve corrosion resistance.
What we can make in Hastelloy C-276
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
- Solution annealing restores the specified corrosion-resistant condition after the agreed manufacturing route.
- Inspection
- Chemistry · final condition · mechanical properties · specified surface examination
Where C-276 fits — and what matters
Chemical Processing
Chemical pump covers and reactor connectionsHastelloy C-276 fully threaded stud & nut sets supply the stud and two mating nuts for chemical pump covers and reactor connections as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. Process liquid can remain at the contact after the exposed surface drains.
Mining & Mineral Processing
Chemical-recovery pump and vessel coversHastelloy C-276 fully threaded stud & nut sets supply the stud and two mating nuts for chemical-recovery pump and vessel covers as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. Leach solution and deposits act on the installed part; corrosion duty is separate from abrasive wear.
Pulp & Paper
Bleach-plant pump and process coversHastelloy C-276 fully threaded stud & nut sets supply the stud and two mating nuts for bleach-plant pump and process covers as one assembly line item. Thread fit, nut pattern and stud length are coordinated before packing. Process carryover and shutdown cleaning can expose the connection to different chemical mixtures.
Same stud & nut set. Different material priorities.
Hastelloy C-276 material dataHastelloy C-22
A nickel-chromium-molybdenum alloy with resistance across many oxidising and reducing process environments.
Hastelloy C-22 Stud & Nut SetsInconel 625
Molybdenum and niobium provide solid-solution strength, combined with resistance to chloride pitting and crevice corrosion.
Inconel 625 Stud & Nut SetsAlloy 20
Nickel, chromium and copper make Alloy 20 a useful candidate for sulfuric-acid process equipment.
Alloy 20 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 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
Acid reactor nozzles & chemical piping flanges: Acid mixture · concentration · temperature.
Material & final condition
Solution annealing restores the specified corrosion-resistant condition after the agreed manufacturing route.
Connection inspection
Stud length · nut pattern · external / internal thread fit. Chemistry · final condition · mechanical properties · specified surface examination.
Matching Kit
Flange Stud Bolt Kits
Build your C-276 stud & nut set enquiry
Upload drawing insteadQuestions about C-276 fully threaded stud & nut sets
What is included in a C-276 stud set?
The base set is one stud with two nuts. Nut pattern, grade and condition are identified separately; washers, coatings and flange-tag packing are added to the item when the assembly calls for them.
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.