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Locking disc spring washer Type M
Locking disc spring washer Type M - 1
Locking disc spring washer Type M - 2

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

Locking disc spring washer Type M

Spring steel, zinc flake GEOMET 321

  • Thickness: 1.4 mm
  • Material: Spring steel
  • Surface: Flake zinc silver
  • RoHS-compliant: Yes
  • Corrosion protection period: 480 h
  • Form: M
  • Suitable for: High-strength bonds
  • Locking function: Embedding locking device

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Available in 2 versions

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You can refine your search by selecting different attributes

Art.-no. Suitable for screw thread Internal diameter Outer diameter Height Quantity PU
M8 8.2 mm 18.2 mm 2.4 mm
25 pcs
M6 6.1 mm 14.2 mm 2.2 mm
100 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.
Art.-no. Cust. Mat. No.

Hazardous Material

Product information

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Technical information

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Powerful, form-fitting locking of screw connections against loosening and unscrewing

  • Type M: for high-strength connections with normal head contact

  • Hardened spring steel, 420-510 high strength 10, GEOMET® 321-coated

  • Spring force for friction-fit connection

  • Specially embossed surface for form-fit connection

  • Reusable

  • Protects the counter surface from damage (washer does not turn during installation)

  • Minimal tightening torque distribution

  • Universal application, e.g. also suitable for slot fastening and sheet-metal screw joints

The extremely reliable positive locking effect against unscrewing has been verified through the application of a dynamic load (vibration) across the screw axis in many practical tests.