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

Steel Type: EN 1.7182

Available sizes with normal outer diameter: M3 - M42 mm and #5 - 1 1/2” *

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

Surface coating: Zink flake coating, Delta Protekt®

Washer hardness: ≥ 465 HV1** (>= 46 Rockwell HRC)

Corrosion resistance: Minimum 1,000 hours in salt spray test (according to IS09227)

Temperature range: -58°F to 392°F (-50°C to 200°C)

Washers are laser marked with brand, control number and type code for traceability.

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

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

This product is suitable for all general applications. Washers with an enlarged outer diameter (SP) have the same inner diameter as the standard washers. They are designed to be used together with flanged bolts and nuts (ISO 4161,4162) on oversized and slotted holes, or on sensitive surfaces and soft materials.

Washer is through hardened to ensure it is harder than the bolt and contact surface. It is treated with Delta Protekt®, a surface coating that provides excellent corrosion protection. Nord-Lock washers work with all common bolt grades such as 4.8, 5.6, 8.8, 10.9 and 12.9.