ND Patch is a pre-applied threadlocking coating (typically Nylon), which is fused to internal or external threads of a fastener. ND Patch is dry to the touch and ready for use right out of the box. Unlike reactive thread lockers, ND Patch performs immediately upon assembly with no curing time required.
When assembled with a mating part, ND Patch is compressed. The engineered plastic (typically a Nylon Patch) resists this compression and acts like a wedge, increasing the metal to metal contact 180° opposite the material. This mechanical force creates a strong, yet fully adjustable lock which will not weaken, even under extreme vibration. ND Patch is commonly known as a prevailing torque type self-locking fastener.
Fasteners coated with ND Patch can be repeatedly installed and removed without damage to threads. ND Patch is particularly resistant to deformation, which makes it ideal for reuse.
ND Patch will not dry, shrink, or lose resiliency when exposed to commercial solvents, alcohol, gasoline, oil, caustic soda, jet fuel, etc.
Resists Heat And Cold
ND Patch meets and exceeds IFI Specifications 124 & 524 as well as Military specification MIL-DTL-18240F, Type P, for temperatures from -70°F (-56°C) to +250°F (121°C).
Retains Full Strength
ND Patch process involves no drilling or milling, so there is no loss of the fastener's strength or hardness and no troublesome burrs or chips.
ND Patch seals along the thread helix and can be increased by completely coating the fastener 360° with nylon.
ND Patch is one of the oldest and most popular pre-applied threadlocking products on the market. Excellent alternative to nylon insert lock nuts.
Saves Time: Fasteners coated with ND Patch can be automatically fed through standard feeding devices and require no cure time after installation.
Saves Money: Eliminates the need for costly lock washers, cotter pins, or castellated nuts. Moreover, ND Patch is less expensive than applying bottled threadlockers 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.
Operator Friendly: ND Patch reduces fatigue by greatly reduces the need for re-tightening. Is also non-toxic and safe to handle.
Increased Margins: Add value to your fasteners without adding to inventory by supply customers with self-locking fasteners.
Easy to use: Works on a wide range of material finishes
ND Patch and ND Patch 360° Ring are 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 onto your fasteners at any one of our regional service centers, or we can supply you with fasteners that contain a pre-applied ND Patch.
All fasteners should be from the same lot to insure consistent induction heating during the application process.
ND Patch Competes With
Nylok® Blue Patch
Nylok® Torq-Patch® Lock-Nut
Forest City Technologies Astorlok™
Forest City Tecnologies Eslok®
Bradley Coatings® Nylon Patch
Steering Columns, Engine Applications, Brakes, Rear-End, Transmissions, Areas of Vibration, Areas of Heat, Military Fasteners, Snowboard / Ski binding mounting screws.
Patch Reusability Test
Banjo Bolts, Hex Bolts, Flange Bolts, Wheel Bolts, Machine Screws, Cap Screws, Wood Screws, Sheet Metal Screws, Self Drilling Screws, Shoulder Bolts, Tube Nuts, Fully Threaded Studs, Double Ended Studs, Singled Ended Studs, Press-In Captive Studs, Carriage Bolts, Lag Bolts, Socket Screws, Set Screws, Eye Bolts, Eye Lags, J-Bolts, U-Bolts, Elevator Bolts, Hangar Bolts, Perforated Base Studs, Through Hole Weld Studs.