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Nut with captive washer
Nut with captive washer - 1
Nut with captive washer - 2

For detailed information, other images and documents, please select individual articles from the following table.

Nut with captive washer

W 0379, steel 8, galvanised, blue passivated (A2K)

  • Standards: WN 379
  • Material: Steel
  • Property class: I8I
  • Surface: Zinc plated
  • RoHS-compliant: Yes
  • Thread type x nominal diameter: M6
  • Flange diameter: 18 mm
  • Height: 7.5 mm
  • External drive: WS10
  • Thread type: Metric thread

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You can refine your search by selecting different attributes

Art.-no. Standards Material Property class Surface Quantity PU
WN 379 Steel I8I Zinc plated
25 pcs

Packaging unit

The packaging unit defines the number of articles in one packaging. In the catalog segment you can choose from different packaging units if a pop-up menu is displayed.

Just leave the field empty if you don't know the packaging unit when directly entering the article number in the shopping basket or when importing with Easy-/VarioScan. The packaging unit will be determined automatically.

Structure of our article number

The article number is made up of the following: VVVVAAABBB
VVVV = 4 digits for prefix number (please note that the first digit is currently always 0)
AAA = 3 digits for dimension part 1
BBB = 3 digits for dimension part 2

Example article number structures:
Example 1: Screw with dimensions of 4x10 mm:
00574 10 (2 spaces between the 4 and the 10)

Example 2: Screw with dimensions of 10x20 mm:
005710 20 (1 space between the 10 and the 20)

Example 3: Flat washer with an internal diameter of 6 mm:

Information on price display

Price per packaging unit (PU):
The displayed price is always in line with the displayed packaging, if the PU is 250 the price for 250 units, if the PU is 300 the price for 300 units.

Price with price key representation (PSL):
The price always applies to a quantity ruled through the price key:
Price for 1 unit
Price for 100 units
Price for 1000 units


The quantity shows the number of pieces or units of measure contained in the order or delivery for the respective article.
In contrast to sales packaging and secondary packaging, the disposal costs for chemical-technical products are shown separately. The breakdown of the individual costs can be found on the relevant products and also in the shopping cart, as well as in our General Terms and Conditions (GTC).
Art.-no. Cust. Mat. No.

Hazardous Material

Product information

Wurth Catalogue

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Technical information

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Prices for customers after login

  • Easy mounting. Lock washer and nut form one unit.

  • Single piece. Ordering and storage are streamlined.

  • Quicker and easier installation, especially for overhead work and in places with difficult access.

  • Large contact surfaces, better distribution of tension.

  • Better overlap for large through holes and slots.

  • Protection of workpiece surface. Prevents paint damage and corrosion.

  • Can be used at high temperatures.

  • Locking effect even under extreme conditions. Drive tension in the washer is greater than the bolt pretension.

  • Shorter tightening distance than for standard nuts, no forcing of threads.