Nord-Lock 254 SMO® stainless steel washers are suitable for any general saltwater application

Steel Type: EN 1.4547

Available sizes with normal outer diameter: M3 - M39 (metric) and #5 - 1 1/2” (inches)*

Available sizes with enlarged outer diameter: M3.5 - M27 (metric) and #6 - 1” (inches)*

Washer hardness: ≥ 600 HV0.05**

Corrosion resistance: PREN 45***

Temperature range: -160°C to 500°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.

*** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N.

• - Wedge-locking washers in 254 SMO® material can be used for multiple stainless-steel applications
• - NL4ss-254 is made for M4 bolts which equals #8
• - Nord-Lock wedge-locking washers secure bolted joints

This product is suitable for all your general stainless-steel applications and works very well in saltwater environments. The washer is through hardened to make sure it is harder than the bolt and contact surface. Nord-Lock washers works with all common bolt grades such as; A2-50, A2-70, A2-80, A4-50, A4-70, A4-80. The material 254 SMO® provides very high corrosion resistance.