RS PRO Steel Bright Zinc External Tooth Locking Washer, M3M20, DIN 6797 A

View all Washers

Subtotal (1 bag of 100 units)*

Kr.298 11 

(exc. VAT)

Kr.372 64 

(inc. VAT)

Add to Basket
Select or type quantity
In Stock
  • Plus 2 unit(s) shipping from 09. februar 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Bag(s)
Per Bag
Per unit*
1 +Kr. 298,11Kr. 2,981

*price indicative

RS Stock No.:
287-4238
Brand:
RS PRO
Find similar products by selecting one or more attributes.
Select all

Brand

RS PRO

Product Type

Locking Washer

Compatible Screw/Bolt Size

M3M20

Washer Type

External Tooth

External Diameter

33mm

Inside Diameter

21 mm

Standards/Approvals

DIN 6797 A

Material

Steel

Finish

Bright Zinc

Thickness

1.4mm

RoHS Status: Exempted

COO (Country of Origin):
CN

RS PRO Lock Washers - BZP Steel


From the reliable RS PRO brand, this external tooth lock washer provides superior security for fixings and fastenings. Like standard washers, it distributes the load of a bolt against a surface material. However, its unique locking action prevents the fastener from turning, reducing the likelihood of the fixing loosening over time or under repeated stress. This makes it particularly useful in applications where vibration is a concern.

Features and Benefits


  • Used with threaded fasteners (for example, a bolt or a nut)

  • Used to prevent the fastener from loosening, caused by vibration

  • External teeth effectively ’bite’ into the fastener and substrate surfaces as the fastener is tightened

  • Made from Steel

  • The bright zinc plated (BZP) finish offers resistance against corrosion

  • Conforms to DIN 6797A specifications

    • Applications


  • Domestic appliances such as washers and dryers

  • Industrial machinery

  • Automotive industries

    • Related links