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Delta Protekt Locking Washers

Nord-Lock Delta Protekt Locking Washers provide reliable bolted-joint security by combining Nord-Lock’s proven wedge-locking technology with a Delta Protekt corrosion-resistant surface treatment. Designed for demanding industrial applications, these washers help prevent bolted joints from loosening under vibration and dynamic loads while providing durable protection against corrosion. Their pre-assembled washer pairs simplify installation and deliver consistent locking performance across a wide range of bolted connections.

Models and pricing below
One series, several modelsPick the model that fits your job.Models in this series differ in size, capacity or configuration. Browse them on this page, or call us and we'll match one to your application.Each model is sold and priced individually.

Models Available

68 items

Other models in the same range, from NetSuite's Models Available list. Each is a separate product with its own SKU and price, so they can be added to the order.

ProductInner Diameter - mmOuter Diameter - mmBolt Size - mmPriceQty
NL31206 | NL3 | Wedge Locking Washer, #5 x 0.28'', 200 pk.$137.963.47M3$137.961View details
NL3.51207 | NL3.5 | Wedge Locking Washer, #6 x 3/10'', 200 pk.$137.963.97.6M3.5$137.961View details
NL3.5SP1208 | NL3.5SP | Wedge Locking Washer, #6 x 0.35'', 200 pk.$137.963.99M3.5$137.961View details
NL41209 | NL4 | Wedge Locking Washer, #8 x 3/10'', 200 pk.$137.964.47.6M4$137.961View details
NL4SP1212 | NL4SP | Wedge Locking Washer, #8 x 0.35'', 200 pk.$137.964.49M4$137.961View details
NL51213 | NL5 | Wedge Locking Washer, #10 x 0.35'', 200 pk.$137.965.49M5$137.961View details
NL5SP1218 | NL5SP | Wedge Locking Washer, #10 x 0.43'', 200 pk.$137.965.410.8M5$137.961View details
NL61219 | NL6 | Wedge Locking Washer, M6 x 0.43'', 200 pk.$137.966.510.8M6$137.961View details
NL6SP1226 | NL6SP | Wedge Locking Washer, M6 x 0.53'', 200 pk.$147.106.513.5M6$147.101View details
NL81231 | NL8 | Wedge Locking Washer, 5/16 x 0.53'', 200 pk.$147.108.713.5M8$147.101View details
NL8SP1236 | NL8SP | Wedge Locking Washer, 5/16 x 0.65'', 200 pk.$167.058.716.6M8$167.051View details
NL3/81240 | NL3/8 | Wedge Locking Washer, 3/8 x 0.65'', 200 pk.$167.0510.316.6—$167.051View details
NL101244 | NL10 | Wedge Locking Washer, M10 x 0.65'', 200 pk.$167.0510.716.6M10$167.051View details
NL10SP1250 | NL10SP | Wedge Locking Washer, M10 x 0.83'', 200 pk.$281.7010.721M10$281.701View details
NL121262 | NL12 | Wedge Locking Washer, M12 x 0.77'', 200 pk.$273.051319.5M12$273.051View details
NL12SP1268 | NL12SP | Wedge Locking Washer, M12 x 1'', 100 pk.$198.771325.4M12$198.771View details
NL161286 | NL16 | Wedge Locking Washer, 5/8 x 1'', 100 pk.$198.771725.4M16$198.771View details
NL201307 | NL20 | Wedge Locking Washer, M20 x 1.21'', 100 pk.$298.5221.430.7M20$298.521View details
NL24SP1326 | NL24SP | Wedge Locking Washer, M24 x 1.91'', 50 pk.$461.0025.348.5M24$461.001View details
NL301341 | NL30 | Wedge Locking Washer, 1-1/8 x 1.85'', 50 pk.$429.2931.447M30$429.291View details
NL141644 | NL14 | Wedge Locking Washer, 9/16 x 0.91'', 100 pk.$181.1115.223M14$181.111View details
NL3/8SP2145 | NL3/8SP | Wedge Locking Washer, 3/8 x 0.83'', 200 pk.$281.7010.321—$281.701View details
NL1/22146 | NL1/2 | Wedge Locking Washer, 1/2 x 0.77'', 200 pk.$273.0513.519.5—$273.051View details
NL1/2SP2147 | NL1/2SP | Wedge Locking Washer, 1/2 x 1'', 100 pk.$198.7713.525.4—$198.771View details
NL1/4SP2148 | NL1/4SP | Wedge Locking Washer, 1/4 x 0.53'', 200 pk.$147.107.213.5—$147.101View details
NL3/42150 | NL3/4 | Wedge Locking Washer, 3/4 x 1.21'', 100 pk.$298.522030.7—$298.521View details
NL422191 | NL42 | Wedge Locking Washer, M42 x 2.48'', 25 pk.$337.0443.263M42$337.041View details
NL112195 | NL11 | Wedge Locking Washer, 7/16 x 0.73'', 200 pk.$256.2211.418.5M11$256.221View details
NL242196 | NL24 | Wedge Locking Washer, M24 x 1.54'', 100 pk.$514.4825.339M24$514.481View details
NL1/42670 | NL1/4 | Wedge Locking Washer, 1/4 x 0.45'', 200 pk.$141.337.211.5—$141.331View details
NL16SP2705 | NL16SP | Wedge Locking Washer, 5/8 x 1.21'', 100 pk.$298.521730.7M16$298.521View details
NL20SP2706 | NL20SP | Wedge Locking Washer, M20 x 1.54'', 100 pk.$514.4821.439M20$514.481View details
NL14SP2707 | NL14SP | Wedge Locking Washer, 9/16 x 1.21'', 100 pk.$298.5215.230.7M14$298.521View details
NL182709 | NL18 | Wedge Locking Washer, M18 x 1.14'', 100 pk.$291.5519.529M18$291.551View details
NL12711 | NL1 | Wedge Locking Washer, 1 x 1.54'', 100 pk.$514.4827.939—$514.481View details
NL362713 | NL36 | Wedge Locking Washer, 1-3/8 x 2.17'', 25 pk.$303.9737.455M36$303.971View details
NL272714 | NL27 | Wedge Locking Washer, M27 x 1.65'', 50 pk.$398.6628.442M27$398.661View details
NL332717 | NL33 | Wedge Locking Washer, 1-1/4 x 1.91'', 25 pk.$241.9334.448.5M33$241.931View details
NL3/4SP2720 | NL3/4SP | Wedge Locking Washer, 3/4 x 1.54'', 100 pk.$514.482039—$514.481View details
NL18SP2726 | NL18SP | Wedge Locking Washer, M18 x 1.36'', 100 pk.$440.4519.534.5M18$440.451View details
NL1SP2727 | NL1SP | Wedge Locking Washer, 1 x 1.91'', 50 pk.$461.0027.948.5—$461.001View details
NL27SP2729 | NL27SP | Wedge Locking Washer, M27 x 1.91'', 25 pk.$248.9428.448.5M27$248.941View details
NL22SP2730 | NL22SP | Wedge Locking Washer, 7/8 x 1.65'', 50 pairs$379.8823.442M22$379.881View details
NL36SP2735 | NL36SP | Wedge Locking Washer, 1-3/8 x 2.48'', 25 pk.$278.0337.463M36$278.031View details
NL222804 | NL22 | Wedge Locking Washer, 7/8 x 1.36'', 100 pk.$440.4523.434.5M22$440.451View details
NL392806 | NL39 | Wedge Locking Washer, 1-1/2 x 2.3'', 25 pk.$316.3740.458.5M39$316.371View details
NL56DP2885 | NL56DP | Wedge Locking Washers, Carbon Steel, 2-1/4'', M56, 10 pairs$735.7159.185M56$735.711View details
NL60DP2886 | NL60DP | Wedge Locking Washers, Carbon Steel, 2-3/8'', M60, 10 pairs$83.7663.190M60$83.761View details
NL64DP2887 | NL64DP | Wedge Locking Washers, Carbon Steel, 2-1/2'', M64, 10 pairs$766.9067.195M64$766.901View details
NL68DP2888 | NL68DP | Wedge Locking Washers, Carbon Steel, 2-5/8'', M68, 1 pair$490.3371.1100M68$490.331View details
NL72DP2889 | NL72DP | Wedge Locking Washers, Carbon Steel, M72, 1 pair$520.0175.1105M72$520.011View details
NL76DP2890 | NL76DP | Wedge Locking Washers, Carbon Steel, 3'', M76, 1 pair$534.9179.1110M76$534.911View details
NL80DP2891 | NL80DP | Wedge Locking Washers, Carbon Steel, 3-1/8'', M80, 1 pair$549.8383.1115M80$549.831View details
NL85DP2892 | NL85DP | Wedge Locking Washers, Carbon Steel, M85, 1 pair$564.5988.1120M85$564.591View details
NL90DP2893 | NL90DP | Wedge Locking Washers, Carbon Steel, 3-1/2'', M90, 1 pair$579.5092.4130M90$579.501View details
NL95DP2894 | NL95DP | Wedge Locking Washers, Carbon Steel, 3-3/4'', M95, 1 pair$594.4097.4135M95$594.401View details
NL100DP2895 | NL100DP | Wedge Locking Washers, Carbon Steel, M100, 1 pair$609.18103.4145M100$609.181View details
NL105DP2896 | NL105DP | Wedge Locking Washers, Carbon Steel, 4'', M105, 1 pair$624.08108.4150M105$624.081View details
NL110DP2897 | NL110DP | Wedge Locking Washers, Carbon Steel, M110, 1 pair$638.86113.4155M110$638.861View details
NL115DP2898 | NL115DP | Wedge Locking Washers, Carbon Steel, 4-1/2'', M115, 1 pair$653.78118.4165M115$653.781View details
NL120DP2899 | NL120DP | Wedge Locking Washers, Carbon Steel, 4-3/4'', M120, 1 pair$668.67123.4170M120$668.671View details
NL125DP2900 | NL125DP | Wedge Locking Washers, Carbon Steel, 4-7/8'', M125, 1 pair$683.46128.4173M125$683.461View details
NL130DP2901 | NL130DP | Wedge Locking Washers, Carbon Steel, 5-1/8'', M130, 1 pair$698.35133.4178M130$698.351View details
NL30SP3068 | NL30SP | Wedge Locking Washer, 1-1/8 x 2.17'', 25 pk.$316.3731.455M30$316.371View details
NL33SP3083 | NL33SP | Wedge Locking Washer, 1-1/4 x 2.3'', 25 pk.$316.3734.458.5M33$316.371View details
NL45DP3193 | NL45DP | Wedge Locking Washers, Carbon Steel, 1-3/4'', M45, 25 pairs$16.7946.270M45$16.791View details
NL48DP3195 | NL48DP | Wedge Locking Washers, Carbon Steel, 1-7/8'', M48, 25 pairs$73.5949.675M48$73.591View details
NL52DP3196 | NL52DP | Wedge Locking Washers, Carbon Steel, 2'', M52, 25 pairs$19.9553.680M52$19.951View details

Details

Product information

Overview

Reliable Wedge-Locking Performance

Nord-Lock Delta Protekt Locking Washers are engineered to secure bolted joints exposed to vibration, dynamic loads, and other conditions that can contribute to fastener loosening. The wedge-locking system works by using tension rather than friction to maintain joint security, helping keep the bolt and nut securely engaged during operation.

Corrosion Protection for Demanding Applications

Each washer pair features a Delta Protekt surface treatment designed to provide enhanced corrosion resistance. This makes the washers well suited for industrial environments where bolted connections may be exposed to moisture, temperature changes, chemicals, or other corrosive conditions. The protective coating helps extend the service life of the fastening system while maintaining the performance expected from Nord-Lock locking technology.

Designed for Industrial Bolted Joints

Nord-Lock Delta Protekt washers are suitable for a broad range of mechanical and industrial fastening applications. They can be used with standard bolt and nut assemblies where reliable resistance to loosening is required, providing an engineered alternative to conventional friction-based locking methods.

Simple, Consistent Installation

The washers are supplied as bonded pairs, making them straightforward to handle and install. The wedge-locking design allows the washer pair to be installed beneath the bolt head or nut, helping provide consistent locking performance without requiring specialized installation procedures.

Nord-Lock Engineering

Nord-Lock has developed its locking washer technology specifically for securing bolted joints against loosening caused by vibration and dynamic loads. Delta Protekt adds corrosion protection to this established wedge-locking principle, creating a fastening solution suited to applications where both mechanical security and environmental durability are important.

Applications

Nord-Lock Delta Protekt Locking Washers can be used across numerous industrial fastening applications, including machinery, manufacturing equipment, construction equipment, transportation systems, energy infrastructure, and other assemblies where maintaining bolt preload is critical to reliable operation.

Features & Benefits
Wedge-locking technology helps prevent loosening from vibration and dynamic loads
Delta Protekt surface treatment provides corrosion protection
Designed for demanding industrial fastening applications
Helps maintain bolted-joint security and preload
Pre-assembled washer pairs simplify handling and installation
Suitable for use beneath bolt heads or nuts
Mechanical locking solution does not rely solely on friction
Available in a broad range of sizes and configurations
Engineered by Nord-Lock for reliable bolted-joint performance
Suitable for machinery manufacturing construction transportation and energy applications

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