Epoxy-Lock is a process in which a two part epoxy system is applied to male or female threaded fasteners of all sizes and configurations; creating powerful self-locking & self-sealing fasteners. Epoxy-Lock processing is compatible with a very wide range of material types and finishes including wood, ceramic, many plastics and more.

How it Works

Fastener threads are coated with two separated strips of epoxy resin and hardener beneath a protective skin that allows the fastener to stay dry to the touch. The materials remain inert until assembled to a mating part. At which time, the forces of engagement will crush the surface skin, mix the two epoxy components and initiate a chemical reaction; locking the parts together.


Exceptional Locking

Extensive testing indicates that Epoxy-Lock processed fasteners provide two to four times greater breakaway torque than conventional plastic fastener locking devices.

Chemical Resistant

Oil, gasoline, salt spray, acids, solvents, water, and air have virtually no effect on the epoxy used in Epoxy-Lock processing after a final cure has been achieved.


The Epoxy-Lock process is compatible with a very wide range of materials including plastics, ceramic, wood and most metal finishes.

No Lead Threads Necessary

Because the epoxies used in Epoxy-Lock are soft and pliable, they will not cause or contribute to cross threading.

Long Shelf Life

Processed fasteners have an on part life of 2 years and will remain inert until a cure is activated by engagement with a mating thread.

Surpasses IFI Standards

Epoxy-Lock processed fasteners meet or exceeds all torque requirements of IFI 125, IFI 525, as well as automotive adhesive coated fastener performance specifications.


  • Saves Time: Epoxy-Lock processed fasteners can be automatically fed through standard feeding devices – speeding up your workflow and improving productivity.
  • Saves Money: Epoxy-Lock processing is less expensive than applying bottled thread locking compounds at the point of assembly. Eliminates the need for costly lockwashers, cotter pins or castellated nuts.
  • Quality Control: Pre-Applied parts are coated to specification, insuring consistent performance unlike bottled products.
  • Saves Effort: Epoxy-Lock greatly reduces the need for retightening.
  • Won’t Work Loose:  Under most operating conditions, Epoxy-Lock processed fasteners are unaffected by vibration or reversal of stress.


  • Under typical conditions, Epoxy-Lock has a fixture time of 4 hours with a full cure in 72 hours.
  • Typical coating length is 1.5 times thread diameter.
  • It is recommended that Epoxy-Lock products are not reused.
  • As with all our Pre-Applied products, ND Industries can apply Epoxy-Lock to your fasteners at any one of our regional service centers, or we can supply you with completed pre-applied fasteners.
  • *Shelf life of un-activated part is 2 years when stored in a dry, cool environment.

Epoxy-Lock Competes With

  • N/A – Epoxy-Lock is an ND exclusive product


Engine Applications, Automotive Locking Applications, Automotive Body/Frame Bolts, Suspension Areas, Brakes, Rear-End, Transmissions

Within minutes after assembly, the epoxy forms a bond between surfaces which can only be broken with a wrench. After 12 hours, it outperforms most nylon locking elements in first-off torque. After 24 hours, the epoxy has achieved up to 80% of its ultimate cure. Curing continues for up to 72 hours.

Compatible Fasteners

External Threads:Internal Threads:Rivets:
Banjo Bolts, Hex Bolts, Flange Bolts, Wheel Bolts, Machine Screws, Cap Screws, Wood Screws, Sheet Metal Screws, Self Drilling Screws, Shoulder Bolts, 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.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, Self-Locating Projection Weld Nuts (WN/WNS), Spot Weld Nuts, Projection Weld Nuts, Bridge Spot Weld Nuts, Tab Spot Weld Nuts, Square Projection Weld Nuts, Flange Weld Projection Nuts, Stamped Flange Weld Nuts, Spot Weld Cage Nuts.N/A

Don’t see your parts on this list? We process thousands of different types of fasteners and depending on the quantity will gladly look at whether we can accommodate yours as well.

Technical Data

ProcessColorPrimary UsePrevailing On TorqueBreakaway TorqueTemp MinTemp MaxLubricity
Epoxy-LockOrange (Blue or Yellow Available)Heavy Duty Lock0.55 Nm50 Nm-65°F (-54°C)400°F (200°C)Medium

Prevailing on-torque and Breakaway torque data are from test results conducted on an M-10 x 1.5 class 10.9 phos-oil bolts and M-10 x 1.5 class 10 nuts.


Meets or exceeds the performance requirements of the following specifications and/or standards:

Spec ForSpec NumberND ProcessND Material
American Axel MFG.MS-2408Epoxy-LockEpoxy-Lock
Auburn GearETS-005Epoxy-LockEpoxy-Lock
Axletech InternationalSTF 02-450Epoxy-LockEpoxy-Lock
Briggs & StrattonGM TYPE CD (GM6194M)Epoxy-LockEpoxy-Lock
Dana -ShabSHAES250Epoxy-LockEpoxy-Lock
Detroit Diesel80K15Epoxy-LockEpoxy-Lock
Detroit Diesel9S283Epoxy-LockEpoxy-Lock
Fiat ChryslerMS-CC76 Type A & CEpoxy-LockEpoxy-Lock
Fiat ChryslerPF-6616Epoxy-LockEpoxy-Lock
Fiat ChryslerPF-7985Epoxy-LockEpoxy-Lock
General MotorsGM6124MEpoxy-LockEpoxy-Lock
General MotorsGM6175MEpoxy-LockEpoxy-Lock
General MotorsGM6193MEpoxy-LockEpoxy-Lock
General MotorsGM6194MEpoxy-LockEpoxy-Lock
General MotorsGMW14657B  Epoxy-LockEpoxy-Lock
McGard, Inc.Quality Standard # 36Epoxy-LockEpoxy-Lock
Mercedes-Benz14 125Epoxy-LockEpoxy-Lock
Meritor (Rockwell)Q-29Epoxy-LockEpoxy-Lock
Meritor (Rockwell)Q-43Epoxy-LockEpoxy-Lock
Monroe Auto EquipmentS-652Epoxy-LockEpoxy-Lock
Outboard Marine (OMC)#1767Epoxy-LockEpoxy-Lock
SteelcaseES 3-86-29AEpoxy-LockEpoxy-Lock

Safety, Technical & Process Data Sheets

Process NameMaterialSafety Data Sheet (Applied)Technical Data Sheet (Applied)Process Data Sheet
Epoxy-Lock®Epoxy-LockND3559Epoxy-Lock - TDS (Applied)Epoxy-Lock - PDS
Increase product quality while saving time and money with Pre-Applied adhesives and sealants.