Bright Zinc Plated Steel Internal Tooth Shakeproof Washer, M6

  • RS Stock No. 526-619
  • Manufacturer RS PRO
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
Product Details

RS PRO BZP Spring Steel Lock Washer

From the trusted RS PRO brand, this external tooth lock washer is ideal for added security in fixings and fastenings. They function in the same way as a standard washer, by distributing the load of a bolt against a surface material, but have a locking action that prevents turning of the fastener, meaning there is less chance of the fixing loosening over time or under repeated stress. As such they are commonly used wherever vibration is a factor.

There are various sizes available;

526-574 is an M3 internal tooth shakeproof washer • 526-596 is an M4 internal tooth shakeproof washer
526-603 is an M5 internal tooth shakeproof washer
526-619 is an M6 internal tooth shakeproof washer
530-129 is an M8 internal tooth shakeproof washer
530-135 is an M10 internal tooth shakeproof washer
530-141 is an M12 internal tooth shakeproof washer
193-3453 is an M16 internal tooth shakeproof washer
193-3454 is an M20 internal tooth shakeproof washer
193-3455 is an M24 internal tooth shakeproof washer

Features and Benefits

Shakeproof Washers External Bright zinc plated for corrosion-resistance
Ideal for dynamic loads and vibration environments


Internal tooth lock washers are a type of washer specifically designed to prevent loosening in smaller fastener heads (as opposed to external tooth types that are better for smaller fastener heads.) They are designed to fortify fastenings against dynamic loads, and as such are used in machinery or materials that are often subjected to vibration or continuous movement. They might typically be used in;

Domestic appliances such as washers and dryers
Industrial machinery
Automotive industries


RS PRO aims to be your go-to brand for reliability and value for money. We source great parts at great prices and test everything with our in-house experts to ensure the quality you need. When it comes to tools and fasteners, we know that versatility and dependability are what you need. As such, we stock a variety of mainstay and specialist fasteners and couplers to suit any application. Whether you're a professional electrician, plumber, builder or DIY enthusiast, RS PRO is here to support you.

Attribute Value
For Screw/Bolt Size M6
Washer Type Internal Tooth
Inside Diameter 6.4mm
Outside Diameter 11mm
Material Steel
Finish Bright Zinc Plated
Thickness 0.7mm
114 In stock for delivery within 2 working days
Unit of sale: 1 Bag of 250
(exc. VAT)
(inc. VAT)
Per Bag
Per unit*
1 - 4
5 - 9
10 - 29
30 +
*price indicative
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