Nord-Lock Wedge-Locking Washer Range — Quick Reference
Nord-Lock = ORIGINAL wedge-locking washer system. Pair of washers with cams on inside faces rising FASTER than bolt's thread pitch. Tighten bolt + washers lock together; VIBRATION cannot loosen joint. Premier vibration security.
| Nord-Lock Type | Best For |
|---|---|
| Original Nord-Lock (Pair) | Industry standard — installed as pair |
| Nord-Lock X-Series | Steel + uncoated bolt — enhanced corrosion |
| Nord-Lock SP / GTX (Specialty) | Painted bolt + spring elements |
| Standard 200 Series (Steel Zinc) | Workshop + general industrial |
| Stainless 316 Series | Marine + corrosion + chemical |
| Metric M4 to M64+ | AU + EU + global engineering |
| Imperial #4 to 2-1/2"+ | US-origin + global equipment |
| Junker Vibration Test Verified | Independent test of vibration security |
Critical: Nord-Lock washers installed as PAIR — cams toward each other (concave sides). Single washer = doesn't work. Match grade to bolt + joint torque + environment. Premium price justified by critical applications — heavy machinery + mining + railway + structural where vibration security matters. Junker test = engineering standard for vibration resistance. Brand: Nord-Lock. Companion: lock washers, Schnorr, spring lock washers.
Nord-Lock Wedge-Locking Washers
Nord-Lock is the original wedge-locking washer system — a pair of washers with cams on the inside faces that rise faster than the bolt's thread pitch. Tighten the bolt and the washers lock together; vibration and dynamic load cannot release the joint without unwinding the cams. AIMS Industrial supplies genuine Nord-Lock washers for fitters, mechanical engineers, and maintenance teams who need bolted joints to stay tight in service.
Where Nord-Lock earns its place
- Heavy machinery — earth-moving, mining, agricultural equipment subject to constant vibration
- Wind turbines and rotating equipment — where bolt loosening creates serious safety risk
- Rail and transport — where dynamic loads are high and inspection access is limited
- Industrial machinery — pumps, motors, gearboxes where standard spring or split washers fail in service
Why Nord-Lock works where spring washers fail
Spring washers, split washers, and even nylon-insert nuts can release under sustained vibration. The Nord-Lock geometry is different: the cam angle is steeper than the thread helix, so any rotation that would loosen the bolt is mechanically prevented by the wedge. The washers cannot release the bolt through vibration alone.
The range
Stocked sizes cover M3 through M48 in standard washer pairs, plus stainless steel for corrosive environments and Glued NL washers (pre-assembled pairs) for production use. Specialist Junker-vibration-tested versions are available for the most demanding applications.
Need help matching Nord-Lock to a specific bolt size or application? contact our team — we'll cross-reference and confirm fitment.
People Also Ask — Nord-Lock
Q: How does a Nord-Lock washer work?
Nord-Lock washers are installed as a pair with cams on the inside faces that rise faster than the bolt's thread pitch — tightening the bolt locks the washers together, and the cam angle being steeper than the thread helix mechanically prevents any rotation that would loosen the bolt.
Q: Can Nord-Lock washers be installed as a single washer?
No — Nord-Lock washers must be installed as a pair with the cams facing each other (concave sides together). A single washer doesn't provide the locking action.
Q: What sizes does Nord-Lock come in?
Stocked sizes cover M3 through M48 in standard washer pairs, plus stainless steel versions for corrosive environments and pre-assembled Glued NL washer pairs for production use.
Q: Where are Nord-Lock washers typically used?
Nord-Lock washers are used on heavy machinery (earth-moving, mining, agricultural equipment), wind turbines and rotating equipment, rail and transport, and industrial machinery such as pumps, motors and gearboxes where standard spring or split washers fail in service under vibration.