ND Patch® Hi-Temp



ND Patch Hi-Temp is a high temperature pre-applied threadlocking coating, which is fused to internal or external threads of a fastener making it self-locking and self-sealing. Dry to the touch and ready for use right out of the box; ND Patch performs immediately upon assembly with no curing time required.

Product Information

How It Works

When a fastener coated with ND Patch Hi-Temp is mated to its corresponding hole or mating fastener, the material is compressed. This compression creates a dam-like action on the opposite side of the coated fastener creating very strong metal-to-metal contact. When ND Patch Hi-Temp is fully seated, it forms a positive lock that will not loosen, even under extreme vibration. This dam-like action also creates a positive seal to be used to prevent leakage.

High Temp Resistance

ND Patch Hi-Temp maintains its torque performance through temperatures as low as -70°F (-56°C) and as high as +500°F (+260°C). ND Patch Hi-Temp is the highest temp nylon available.

Low Application Temp

During the application process, fasteners being coated with ND Hi-Temp Patch are only required to be heated to 250°F. Unlike many other high temp nylon materials, this reduces damage to the fastener and its finish.


Fasteners coated with ND Patch Hi-Temp can be re-used repeatedly without damage to the threads. ND Patch Hi-Temp is particularly resistant to deformation, which makes it ideal for repeated use.

Retains Full Strength

ND Patch Hi-Temp process involves no drilling or milling, so there is no loss of the fastener's strength or hardness and no troublesome burrs or chips.

Chemical Resistant

ND Patch Hi-Temp will not dry, shrink, or otherwise be effected when exposed to commercial solvents, alcohol, gasoline, oil, caustic soda, jet fuel, etc.

Improved Sealing

An increased sealing ability can be obtained by completely filling the thread helix 360° with nylon.

Other Benefits

  • Saves Time: Fasteners coated with ND Patch Hi-Temp can be automatically fed through standard feeding devices.
  • Saves Money:ND Patch Hi-Temp saves money by pins, or castellated nuts. ND Patch Hi-Temp is also less expensive than applying bottled thread locking compounds at the point of assembly.
  • Quality Control: Pre-Applied parts are coated to specification, insuring consistent performance unlike bottled products. ND Patch application area and torque can be customized to meet specific needs.
  • In-Line Inspection: During the ND Patch Hi-Temp process, camera systems are used to verify parts are coated exactly to customer’s specifications. This often removes a secondary sorting operation at the end customer.
  • Fast Turn-Around: The ND Patch Hi-Temp process produces a complete, non-chemically reactive, ready to use product. ND Patch Hi-Temp performs immediately upon assembly. There is no cure time required.


  • ND Patch Hi-Temp is normally positioned one to three threads back from the end of the fastener to assure ease of starting.
  • The normal coating length of the Patch is four to six threads. Special Patch location and coating length can be specified for specific applications.
  • Indefinite on part life under ideal storage conditions [+40°F (+4°C) to +90°F (+32°C)], but re-certification must occur once a year.
  • As with all our Pre-Applied products, ND Industries can apply ND Patch Hi-Temp to your fasteners at any one of our regional service centers, or we can supply you with completed pre-applied fasteners.
  • All fasteners should be from the same lot to insure consistent induction heating during the application process.

ND Patch Competes With

  • Nylok® Nytemp®


Engine Applications, Brakes, Rear-End, Transmissions, Areas of Vibration, Areas of Heat

Compatible Fasteners

External Threads:

Banjo Bolts, Double Ended Studs, Hex Bolts, Flange Bolts, Wheel Bolts, Machine Screws, Cap Screws, Wood Screws, Sheet Metal Screws, Self Drilling Screws, Shoulder Bolts, Tube Nuts, Carriage Bolts, Lag Bolts, Socket Screws, Set Screws, Eye Bolts, Eye Lags, J-Bolts, U-Bolts, Shoulder Bolts, Elevator Bolts, Hanger Bolts.

Internal Threads:

Flange Nuts, Hex Body Clinch Nuts, Prevailing Torque Nuts, Floating Nuts, Hollow Bolts, Insert Nuts, Lock Nuts, Weld Nuts, Barrel Nuts, Chicago Bolts, Jam Nuts, Wing Nuts, Square Nuts


Automotive Specifications

ND Patch Hi-Temp meets or exceeds the performance requirements of the following specifications and/or standards

  • Chrysler: PF-5144, PF-5461, PF-6157, PF-6158
  • Ford: ES-382101-S100, ES-378813-S100, ES-N800688-S100, WA970, ES-21002-S100
  • General Motors: GM 6189P

Military Specifications

ND Patch Hi-Temp meets or exceeds the performance requirements of the following specifications and/or standards

  • U.S. Military: MIL-DTL-18240F, MIL-N-25027

Industrial Specifications

ND Patch Hi-Temp meets or exceeds the performance requirements of the following specifications and/or standards

Automotive Specifications

ND Patch Hi-Temp meets or exceeds the performance requirements of the following specifications and/or standards

  • John Deere: JDT905
  • Mack Trucks: 3/6 AXS5, 10 AMS1
  • FMC: 126052
  • Meritor (Rockwell): Q-70

ND Patch Hi-Temp Reusability

Tech Data

Lead Threads
Coating Length
Salt Spray Resistance
Temp Min
Temp Max
ND Patch Hi-Temp (Reinforced Nylon)Orange and Gray*5 Cycles1 to 34 to 6 ThreadsShore D 70-80**1,000+ hours***-70°F (-57°C)500°F (260°C)

* QPL-18240 & MIL-DTL-18240F requires gray nylon;  **(ASTM D2240);  ***ASTM B117 (X scribe)

Safety, Technical & Product Data Sheets

Process Name
Safety Data Sheet (Applied)
Technical Data Sheet (Applied)
Product Data Sheet
ND Patch® Hi-TempND Hi-Temp (Reinforced Nylon)ND3293ND Patch Hi-Temp - PDS