Plain Copper Crinkle Locking & Anti-Vibration Washer, M4

  • RS Stock No. 289-679
  • Manufacturer RS PRO
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): GB
Product Details

Berylium Copper

Crinkle Washer

RS PRO Copper Crinkle Lock Washer

There are at least two main reasons why bolts are failing. It could be either spontaneous bolt loosening or slackening due to many factors like vibration, new or soft material you use. How to handle this issue? The answer is to use appropriate washers for secure locking of your fasteners.

We are proudly introducing our own branded RS PRO Lock Washer, Crinkle type designed for pre-loading and spacing to increase stability to your nuts.

They function 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.

In order to give you the superb option to choose from, our extensive range of Lock Washers offer the following sizes.

428-616 is Screw/Bolt size of M2 A2 Stainless Steel Crinkle Lock Washer
428-622 is Screw/Bolt size of M2.5 A2 Stainless Steel Crinkle Lock Washer
428-638 is Screw/Bolt size of M3 A2 Stainless Steel Crinkle Lock Washer
428-650 is Screw/Bolt size of M4 A2 Stainless Steel Crinkle Lock Washer
428-666 is Screw/Bolt size of M5 A2 Stainless Steel Crinkle Lock Washer
428-672 is Screw/Bolt size of M6 A2 Stainless Steel Crinkle Lock Washer
428-688 is Screw/Bolt size of M8 A2 Stainless Steel Crinkle Lock Washer
428-767 is Screw/Bolt size of 7/16 in A2 Stainless Steel Crinkle Lock Washer
428-773 is Screw/Bolt size of 1/2 in A2 Stainless Steel Crinkle Lock Washer

Features and Benefits

  • The Crinkle Type Washer provides locking and anti-vibration properties

  • M4 size Washer made of copper for corrosion-resistance, particularly in seawater and sulphuric acid containing environments

  • Ideal for pre-loading and spacing to increase stability

  • The internal diameter of 4.36 mm and an external diameter of 7.99 mm

Applications

RS PRO Crinkle Washers have advantages over plain washers as they provide an element of locking and vibration resistance in a fastener. While still fulfilling the purposes of a plain washer, namely spacing and distributing load between the fastener and material and prevent the wear and distortion of installation surfaces over time.

There are no surprises why our Crinkle type Washers are commonly used in:

  • Electronic applications

  • Food applications

  • Chemical applications

  • Construction applications (used in plumbing for tap fitting)

Why RS PRO?

RS PRO is our family brand to go-to and brings you a wide range for high-quality and high-value products to support your project. Trusted by engineers all over the world, every part of every RS PRO product is always rigorously tested against demanding industry standards. We are only giving the RS PRO seal of approval if we are confident of their exceptional quality, which means you can be convinced too.

Specifications
Attribute Value
For Screw/Bolt Size M4
Washer Type Crinkle
Inside Diameter 4.36mm
Outside Diameter 7.99mm
Material Copper
Finish Plain
Thickness 0.28mm
645 In Global stock for delivery within 4 - 8 working days
Price 1 Bag of 100
Was PHP433.17
PHP 349.76
(exc. VAT)
PHP 391.73
(inc. VAT)
Bag(s)
Per Bag
Per Unit*
1 - 4
PHP349.76
PHP3.498
5 - 9
PHP343.59
PHP3.436
10 - 29
PHP334.54
PHP3.345
30 +
PHP324.25
PHP3.242
*price indicative
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