Zirconium 702 Nylon-insert lock nuts
ISO 7040ASTM B550
Zirconium 702 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 commercially pure zirconium corrosion resistance in selected process media.
- 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 working stresses and restores ductility, with atmosphere and surface control limiting contamination during heating.
What we can make in Zirconium 702
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
Forming and thermal processing require contamination control. The final surface is cleaned before dimensional and material acceptance.
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 Zirconium 702 fits — and what matters
Chemical Processing
Mixer drives and process-equipment bracketsZirconium 702 nylon-insert lock nuts retain the threaded mountings on mixer drives and process-equipment brackets using insert-generated prevailing torque. The nylon insert defines the temperature and reuse limits of the complete nut. Process liquid can remain at the contact after the exposed surface drains.
Pumps, Valves & OEM
Actuator mounts and pump baseplatesZirconium 702 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.
Mining & Mineral Processing
Leach-equipment and dosing-skid supportsZirconium 702 nylon-insert lock nuts retain the threaded mountings on leach-equipment and dosing-skid supports using insert-generated prevailing torque. The nylon insert defines the temperature and reuse limits of the complete nut. Leach solution and deposits act on the installed part; corrosion duty is separate from abrasive wear.
Same nylon-insert lock nut. Different material priorities.
Zirconium 702 material dataHastelloy C-276
Resistance to chemically aggressive, mixed process streams.
- Connection priority
- Metal-body load capacity and polymer-generated prevailing torque
- Process liquid and shutdown chemistry
- The Hastelloy C-276 body and the nylon insert need separate acceptance. Cleaner, moisture and temperature exposure reach the insert at the mating thread; its rated condition controls prevailing-torque service.
Inconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Metal-body load capacity and polymer-generated prevailing torque
- Annealed or solution-annealed 625
- The Inconel 625 body and the nylon insert need separate acceptance. Cleaner, moisture and temperature exposure reach the insert at the mating thread; its rated condition controls prevailing-torque service.
Hastelloy C-22
Corrosion resistance across oxidising and reducing process exposures.
- Connection priority
- Metal-body load capacity and polymer-generated prevailing torque
- Production and cleaning cycles
- The Hastelloy C-22 body and the nylon insert need separate acceptance. Cleaner, moisture and temperature exposure reach the insert at the mating thread; its rated condition controls prevailing-torque service.
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 R60702 · heat number · ordered condition
- Final-part acceptance
- Grade chemistry, surface condition and the 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 Zirconium 702 nylon-insert lock nut enquiry
Questions about Zirconium 702 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.