Incoloy 800 Nylon-insert lock nuts
ISO 7040ASTM B408
Incoloy 800 nylon-insert nuts combine a specified alloy body with polymer-generated prevailing torque. Insert temperature, chemical compatibility and reuse performance define the complete nut’s service, including when the body is selected for heat and oxidation resistance for thermal equipment.
- 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 Alloy 800
Nylon insert
Use where a prevailing-torque nut helps retain an adjustment or mounting connection without a separate locking part. The bolt must engage through the nylon ring for the insert to act.
Metal body
The metal threads carry the axial clamp load. Select the body pattern and strength for that load, then check the additional running torque from the insert when setting the tightening process.
Temperature & chemicals
Choose this form for equipment temperatures and chemicals compatible with the insert. A nickel-alloy body does not make nylon suitable for furnace service; use an all-metal locking arrangement for elevated-temperature joints.
- Locking element
- Nylon insert
- Drive
- External hex
- Threads
- Metric · Inch
- Service limit
- Controlled by the insert
- Final condition
- Annealed
- Inspection
- Insert retention · Prevailing torque · Dimensions
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
The nylon insert is installed after metal heat treatment and finishing. Prevailing torque is checked on the complete nut, including the specified reuse requirement.
Where 800 fits — and what matters
Industrial Machinery & Automation
Machine frames and positioning fixturesIncoloy 800 nylon-insert lock nuts retain the threaded mountings on machine frames and positioning fixtures using insert-generated prevailing torque. The nylon insert defines the temperature and reuse limits of the complete nut. Alignment, operating cycles and replacement access define the working interface.
Automotive & EV Manufacturing Equipment
Assembly fixtures and test-rig framesIncoloy 800 nylon-insert lock nuts retain the threaded mountings on assembly fixtures and test-rig frames using insert-generated prevailing torque. The nylon insert defines the temperature and reuse limits of the complete nut. Repeated tooling changes require consistent seating and repeatable assembly dimensions.
Pumps, Valves & OEM
Actuator mounts and pump baseplatesIncoloy 800 nylon-insert lock nuts retain the threaded mountings on actuator mounts and pump baseplates using insert-generated prevailing torque. The nylon insert defines the temperature and reuse limits of the complete nut. Repeated maintenance makes fit, engagement and access part of the component specification.
Same nylon-insert lock nut. Different material priorities.
Incoloy 800 material dataIncoloy 800
UNS N08800 · Current grade- Carbon
- ≤0.10%
- What changes
- General heat and oxidation resistance; no grain-size requirement in the family comparison.
Incoloy 800H
UNS N08810- Carbon
- 0.05–0.10%
- What changes
- Controlled carbon and coarse-grain condition for creep and stress-rupture duty.
Incoloy 800HT
UNS N08811- Carbon
- 0.06–0.10%
- What changes
- Tighter carbon and Al + Ti control (0.85–1.20%), with solution treatment and coarse grain for creep duty.
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 N08800 · heat number · ordered condition
- Final-part acceptance
- Grade chemistry, supplied condition and ordered mechanical requirements. Insert identity and complete-nut prevailing-torque results.
- Dimensional record
- Insert retention · Prevailing torque · Dimensions
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your 800 nylon-insert lock nut enquiry
Questions about 800 nylon-insert lock nuts
Can a heat-resistant body make the nylon nut suitable for a hot joint?
The nylon remains the temperature-limiting part. Use the actual insert rating and required prevailing-torque performance; a hot-service metal grade does not extend the polymer’s limit.