Nord-Lock steel washers are suitable for any general steel application

Steel Type: EN 1.7182

Available sizes with normal outer diameter: M3 - M42 (metric) and #5 - 1 1/2” (inches)*

Available sizes with enlarged outer diameter: M3.5 - M36 (metric) and #6 - 1 3/8” (inches)*

Surface coating: Zink flake coating, Delta Protekt®

Washer hardness: ≥ 465 HV1**

Corrosion resistance: Minimum 1000 hours in salt spray test (according to IS09227)

Temperature range: -50°C to 200°C

All washers are laser marked with brand name, control number and type code for increased traceability down to the raw material in the factory.

* View dimension list to determine the required washer size for your bolt.

** In order to assure the unique mechanical wedge-locking function of the Nord-Lock washers, the hardness of the contact surfaces must be lower than the hardness of the Nord-Lock washers. Go to washer selection guide for the hardness conversion table.

• - Nord-Lock wedge-locking washers secure bolted joints
• - NL4sp is made for M4 bolts which equals #8
• - Wedge-locking washers suitable for many different tasks and challenges

This washer has the same inner diameter as the standard washer in same size, but it has an enlarged outer diameter. The washer is designed to work well in applications with enlarged and slotted holes or where the contact surface is soft, such as aluminum and copper.

The washer is through hardened to make sure it is harder than the bolt and the contact surface. It is treated with Delta Protekt®, a surface coating that provides a very high corrosion protection. To optimize the load bearing area a flanged nut or bolt should be used together with this washer. Nord-Lock washers work with all common bolt grades such as 4.8, 5.6, 8.8, 10.9 and 12.9.