Nord-Lock · Stops bolts loosening under vibration
Nord-Lock Original Washers
Nord-Lock Original washers from R Square Technologies, an authorised Nord-Lock distributor in Chennai, supplied across India.
The classic Nord-Lock washer. A pair of washers that locks any bolt facing vibration or dynamic load.
Applications
Where it is used
- Machines, conveyors and vibrating screens
- Pumps, compressors, gearboxes and motors
- Rolling stock, vehicles and mobile equipment
- Any bolted joint under dynamic load
Key facts
- Locks with bolt tension, not friction
- Works on lubricated bolts
- For bolts up to property class 12.9 (steel) and A4-80 (stainless)
- Reusable in most cases, depending on operating conditions
Video
See how it works
This animation shows an Original washer pair fitted under a bolt head. The teeth bite into the bolt head and the surface, so the two washers can only move against each other on the cams. When vibration tries to turn the bolt loose, the cams lift and raise the bolt tension, and the turning stops.
Official Nord-Lock Group video, played from YouTube.Specifications
Types and sizes
| Code | Material | Washer type |
|---|---|---|
| NL | Steel | Standard |
| NLsp | Steel | Enlarged outer diameter |
| NLss | Stainless steel | Standard |
| NLspss | Stainless steel | Enlarged outer diameter |
| 254 | 254 SMO special alloy | For corrosive or demanding environments |
| 276 | Alloy C-276 | For corrosive or demanding environments |
| 718 | Alloy 718 | For high-temperature use |
- Sizes: M3 to M130.
- Steel washers work from -50°C to 200°C. Stainless washers work from -160°C to 500°C.
- How to pick: steel bolt, steel washer. Stainless bolt, stainless washer. Big or slotted hole, pick the enlarged (sp) type.
- How to read the code: NL6spss means Nord-Lock, fits M6, enlarged, stainless.
Supply and downloads
Supply time and documents
Supply time
Supply time depends on size, material and quantity. Send your requirement and we will confirm availability and lead time with your quote.
Ask for a quoteOfficial Nord-Lock datasheet
Free datasheets, brochures and CAD files are available from the Nord-Lock download center.
Open the Nord-Lock download center ↗R Square product PDF
Our original washers PDF with specs, supply details and contacts.
FAQ
Common questions
Do I need one pair or two?
One pair under the bolt head for a blind hole. For a through bolt with a nut, use one pair under the head and one pair under the nut.
Do they work with lubricated bolts?
Yes. Lubrication does not affect the locking.
Can Nord-Lock washers be reused?
Yes, in most cases, depending on operating conditions.
Guides
Related guides
Download and enquire
Get a quote for original washers
Tell us your bolt size and job. We reply within one working day.
