Nimonic 75 Hex Nuts
ISO 4032BS HR 5
Nimonic 75 hex nuts pair a solid-solution nickel-chromium alloy with a standard-height mating nut for furnace cover, tube, and fixture bolt systems. Paired with matching Nimonic 75 bolts and studs, they support full thread engagement within standard height.
- 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
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
AnnealedAnnealing reduces work hardening and restores ductility for the specified supplied condition.
What we can make in Nimonic 75
Regular hex
Use on equipment covers and mounting brackets with standard socket access. The compact wrenching envelope is useful where adjacent fasteners or housing walls restrict tool clearance.
Heavy hex
Use on flange-bolting sets and pressure-equipment joints calling for a heavy-hex pattern. The wider bearing footprint and larger wrench size require more seat area and socket clearance than a regular hex nut.
Thin hex
Use in restricted axial spaces or as part of a specified two-nut locking arrangement. Reduced thread engagement means a thin nut is not a direct load-capacity replacement for a full-height nut.
- Metric thread
- M4–M100
- Inch thread
- 1/4″–4″
- Patterns
- Regular hex · Heavy hex
- Thread systems
- Metric · UNC · UNF · 8UN · UNJ
- Final condition
- Annealed
- Inspection
- Thread plug gauges · Across flats · Nut height
Manufacturing route
Small lots use machined blanks. Volume nut blanks use a forming route compatible with the alloy before machining the bore and tapping.
Heat treatment & final condition
The ordered annealed or solution-treated state is retained in the lot record; forming and machining do not replace the specified thermal condition.
Finished geometry
Internal thread gauging, usable engagement and bearing-face alignment are checked after final processing.
Where Nimonic 75 fits — and what matters
Retort & muffle covers
Nimonic 75 Hex NutsRegular hex Nimonic 75 nuts fit closely spaced retort accessory studs and small cover attachments. They provide oxidation-resistant threads in a compact pattern. The combination is useful for moderate-load hardware that is opened during furnace maintenance, without occupying the space needed by a heavy hex nut.
Connection requirements
- Mating stud diameter, thread form, and thread class
- Nut height, width across flats, and bearing-face condition required
- Temperature range, cycling duty, and heat-number certification
Radiant tubes & circulation fans
Nimonic 75 Hex NutsNimonic 75 nuts suit moderate-load retaining studs on radiant-tube supports and stationary furnace-fan housings. They provide scaling-resistant threads in a compact pattern that fits between brackets and nearby hardware.
Connection requirements
- Mating stud diameter, thread form, and thread class
- Nut height, width across flats, and bearing-face condition required
- Temperature range, vibration duty, and heat-number certification
Carburizing & stack fixtures
Nimonic 75 Hex NutsOn furnace stack fixtures, Nimonic 75 nuts can secure spacers and retaining bars exposed to hot atmospheres. Their regular pattern leaves space between closely arranged tooling components. The practical advantage is a compact, oxidation-resistant nut for moderate loads and repeatable fixture setup.
Connection requirements
- Mating stud diameter, thread form, and thread class
- Nut height, width across flats, and bearing-face condition required
- Temperature range, cycling duty, and heat-number certification
Same hex nut. Different material priorities.
Nimonic 75 material dataInconel 601 Hex Nuts
Inconel 601 hex nuts fit space-limited retort covers, fixture stacks and lining retainers. They provide oxidation-resistant internal threads in a compact pattern. Regular hex dimensions leave tool clearance around closely arranged supports that cannot accommodate heavy-pattern nuts.
Inconel 600 Hex Nuts
Inconel 600 hex nuts combine a compact pattern with resistance to furnace oxidation and selected hot-caustic environments. They suit closely spaced cover studs and auxiliary brackets. Matching the nut to the mating fastener places corrosion-resistant material on both sides of the threaded connection.
Nimonic 80A Hex Nuts
Nimonic 80A hex nuts fit compact hot exhaust connections and boiler support rods. Precipitation-hardened strength supports the loaded threads, while the regular pattern leaves tooling room around brackets. On threaded hangers, accessible flats also allow position adjustment during installation.
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 N06075 · heat number · ordered condition
- Final-part acceptance
- Grade chemistry, supplied condition and ordered mechanical requirements.
- Dimensional record
- Thread plug gauges · Across flats · Nut height
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Matching Kit
Flange Stud Bolt Kits
Build your Nimonic 75 hex nut enquiry
Questions about Nimonic 75 hex nuts
Does a matching UNS make the stud and nut a matched set?
Matching chemistry addresses only one part of the order. Nut strength, effective engagement, internal thread fit and surface friction must also suit the stud and assembly tightening method.