Nord-Lock Washer
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Nord-Lock Washer

Nord-Lock wedge-locking washers utilize tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads. The system cannot loosen unintentionally as it creates a wedge-effect underneath the bolt head or nut. The system comprises of a pair of wedge-lock washers with cams on one side and radial teeth on the opposite side. As the fastener attempts to loosen, the unique design of the Nord-Lock's interior wedge design causes increased tension on the fastener, stopping the unwanted rotation. Over the operational life cycle, Nord-Lock washers offer increased operational reliability and lower maintenance costs, while significantly reducing the risks of production stops, accidents and warranty claims. Nord-Lock washers offer high corrosion resistance due to their 1000 hour salt spray coating. 

Dimensional SpecificationsNord-Lock Washer

STS Part Number Bolt Size d D T Bolt Size d D T
ID OD Thickness ID OD Thickness
Imperial inch inch inch Metric mm mm mm
WNRD025 1/4 0.28 0.45 0.10 - 7.20 11.50 2.50
WNRD031 5/16 0.34 0.53 0.10 M8 8.70 13.50 2.50
WNRD037 3/8 0.41 0.65 0.10 - 10.30 16.60 2.50
WNRDM10 - 0.42 0.65 0.10 M10 10.70 16.60 2.50
WNRD043 7/16 0.45 0.73 0.10 M11 11.40 18.50 2.50
WNRDM12 - 0.51 0.77 0.10 M12 13.00 19.50 2.50
WNRD050 1/2 0.53 0.77 0.10 - 13.50 19.50 2.50
WNRD056 9/16 0.60 0.91 0.13 M14 15.20 23.00 3.40
WNRD062 5/8 0.67 1.00 0.13 M16 17.00 25.40 3.40
WNRDM18 - 0.77 1.14 0.13 M18 19.50 29.00 3.40
WNRD075 3/4 0.79 1.21 0.13 - 20.00 30.70 3.40
WNRDM20 - 0.84 1.21 0.13 M20 21.40 30.70 3.40
WNRD087 7/8 0.92 1.36 0.13 M22 23.40 34.50 3.40
WNRDM24 - 1.00 1.54 0.13 M24 25.30 39.00 3.40
WNRD100 1 1.10 1.54 0.13 - 27.90 39.00 3.40
WNRD112 1 1/8 1.24 1.85 0.23 M30 31.40 47.00 5.80
WNRD125 1 1/4 1.35 1.91 0.23 M33 34.40 48.50 5.80
WNRD137 1 3/8 1.47 2.17 0.23 M36 37.40 55.00 5.80
WNRD150 1 1/2 1.59 2.30 0.23 M39 40.40 58.50 5.80
Nord-Lock Washer
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Diameter Inside Diameter Outside Diameter Thickness Item # Availability Price Quantity UOM
1/4 0.28 0.45 0.1 WNRD025 In Stock $1.38342/EA EA
5/16, M8 0.34 0.53 0.1 WNRD031 In Stock $1.39996/EA EA
3/8 0.41 0.65 0.1 WNRD037 In Stock $1.55326/EA EA
M10 0.42 0.65 0.1 WNRDM10 In Stock $1.55334/EA EA
7/16, M11 0.45 0.73 0.1 WNRD043 In Stock $2.53917/EA EA
M12 0.51 0.77 0.1 WNRDM12 Out Of Stock $2.53344/EA EA
1/2 0.53 0.77 0.1 WNRD050 In Stock $2.73432/EA EA
9/16, M14 0.6 0.91 0.13 WNRD056 Out Of Stock $6.82219/EA EA
5/8, M16 0.67 1.0 0.13 WNRD062 In Stock $3.72771/EA EA
M18 0.77 1.14 0.13 WNRDM18 Out Of Stock $5.22387/EA EA
3/4 0.79 1.21 0.13 WNRD075 In Stock $5.59868/EA EA
M20 0.84 1.21 0.13 WNRDM20 Out Of Stock $5.34882/EA EA
7/8, M22 0.92 1.36 0.13 WNRD087 In Stock $8.54229/EA EA
M24 1.0 1.54 0.13 WNRDM24 Out Of Stock $9.21866/EA EA
1 1.1 1.54 0.13 WNRD100 In Stock $9.29972/EA EA
1 1/8, M30 1.24 1.85 0.23 WNRD112 Out Of Stock $16.06047/EA EA
1 1/4, M33 1.35 1.91 0.23 WNRD125 In Stock $18.08618/EA EA
1 3/8, M36 1.47 2.17 0.23 WNRD137 Out Of Stock $22.74409/EA EA
1 1/2, M39 1.59 2.3 0.23 WNRD150 Out Of Stock $23.52335/EA EA