Authorized ABB Distributor (Installation Products)
ABB - Installation Products DTW14 - Transition Washer for Connecting Aluminum/Aluminum, Aluminum/Copper and Aluminum/Copper Lugs and Bus Bar,Outer Diameter 17.3mm (0.68 Inch), Inner Diameter 6.9mm (0.27 Inch), Stud Size 1/4 Inch, Copper Alloy, Tin Plated

ABB Installation Products DTW14 Transition Washer for Connecting Aluminum/Aluminum, Aluminum/Copper and Aluminum/Copper…

UPC: 786210868660


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Overview

The ABB DTW14 transition washer is a precision-engineered component designed for reliable electrical connections between aluminum and copper conductors. This washer facilitates secure joints between aluminum-to-aluminum, copper-to-copper, and aluminum-to-copper lugs and bus bars, addressing the critical challenge of dissimilar metal compatibility in electrical systems. The DTW14 features a 1/4-inch stud size with an outer diameter of 17.3mm (0.68 inches) and an inner diameter of 6.9mm (0.27 inches), ensuring compatibility with standard hardware and mounting configurations. Constructed from high-conductivity copper alloy and tin-plated for enhanced corrosion resistance, the DTW14 minimizes galvanic corrosion risks while maintaining optimal electrical performance. Its robust design resists deformation under torque, providing consistent clamping force and long-term reliability in high-vibration environments such as power distribution panels, motor control centers, and renewable energy systems. The DTW14 is part of the Dragon Tooth® transition washer series, a trusted solution in industrial and commercial electrical installations where material compatibility and connection integrity are paramount. Unlike standard washers, this transition washer eliminates the need for additional bimetallic connectors, simplifying assembly and reducing material costs. It is suitable for grounding and bonding applications, further expanding its utility in safety-critical systems. Key applications include: - Power distribution panels and switchgear - Motor control centers and starters - Renewable energy systems (solar, wind) - Industrial machinery and equipment - Commercial building electrical systems The DTW14’s tin plating ensures compatibility with both aluminum and copper conductors, preventing oxidation and maintaining low contact resistance over time. Its compact dimensions make it ideal for tight spaces where larger washers would be impractical. For projects requiring multiple transition points, the DTW14 integrates seamlessly with standard hardware, including bolts, nuts, and lock washers, ensuring a complete and reliable connection system.
  • Connects aluminum-to-aluminum, copper-to-copper, and aluminum-to-copper lugs/bus bars
  • 1/4" stud size with 17.3mm outer diameter and 6.9mm inner diameter
  • Tin-plated copper alloy construction for corrosion resistance and conductivity
  • Suitable for grounding and bonding applications
  • Part of the Dragon Tooth® transition washer series

Specifications

Application
Teeth on the transition washers penetrate aluminum and copper oxides, enabling copper to aluminum connections to be made in a bolted joint without the use of inhibiting compounds
Connection Type
Transition Washer for Aluminum/Aluminum, Aluminum/Copper, and Copper/Copper Connections
Finish
Tin Plated
Fits Bolt Sizes
1/4 IN
Inside Diameter
0.27 in
Inside Diameter
6.9 mm
Material
Copper
Material
Copper Alloy, Tin Plated
Mounting Type
Washer
Outside Diameter
0.68 in
Outside Diameter
17.3 mm
Size
Outer Diameter 17.3mm (0.68 Inch), Inner Diameter 6.9mm (0.27 Inch), Stud Size 1/4 Inch
Standard
UL E9809
Standard
UL E9809 / UL E9809
Thickness
0.035 in
Thickness
0.89 mm
Type
Transition Washer
Package Dimensions (L x W x H)
3.3 IN x 2.8 IN x 2.3 IN
Package Dimensions (L x W x H)
8.382 cm x 7.112 cm x 5.842 cm
Package Weight (Imperial)
0.010 L
Package Weight (Metric)
0.005 kg
Transition Washer for Connecting Aluminum/Aluminum, Aluminum/Copper and Aluminum/Copper Lugs and Bus Bar, Outer Diameter 25.4mm (1.0 Inch), Inner Diameter 8.6mm (0.34 Inch), Stud Size 5/16 Inch, Copper Alloy, Tin Plated

DTW516

Transition Washer for Connecting Aluminum/Aluminum, Aluminum/Copper and Aluminum/Copper Lugs and Bus Bar, Outer Diameter 25.4mm (1.0 Inch), Inner Diameter 8.6mm (0.34 Inch), Stud Size 5/16 Inch, Copper Alloy, Tin Plated
1/2 Flat Wshr Copper

JSWC76

1/2 Flat Wshr Copper
A thin, flat, circular stamping with a centrally located hole. It is a flat cut washer made of brass with a copper color. The washer has a thickness of 0.034 in, an outside diameter of 0.375 in, and an inside diameter of 0.161 in.

43305

A thin, flat, circular stamping with a centrally located hole. It is a flat cut washer made of brass with a copper color. The washer has a thickness of 0.034 in, an outside diameter of 0.375 in, and an inside diameter of 0.161 in.
Washer, Flat, Size 3/8 Inch, Steel

ZE147 3/8-10

Washer, Flat, Size 3/8 Inch, Steel
Washer, Flat, Size 1/4 Inch, Steel

ZE147 1/4-10

Washer, Flat, Size 1/4 Inch, Steel
Washer, Flat, Size 3/4 Inch, Type 316 Stainless Steel

E147-3/4SS6

Washer, Flat, Size 3/4 Inch, Type 316 Stainless Steel
Washer, Flat, Size 5/8 Inch, Type 316 Stainless Steel

E147-5/8SS6

Washer, Flat, Size 5/8 Inch, Type 316 Stainless Steel
Washer, Flat, Size 3/4 Inch, Electro-Galvanized Steel

E147-3/4EG

Washer, Flat, Size 3/4 Inch, Electro-Galvanized Steel

Frequently Asked Questions about ABB - Installation Products

How are Thomas and Betts products typically installed?

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What are the main product lines offered by Ocal?

Ocal offers a comprehensive range of corrosion-resistant conduit systems, including PVC-coated conduit and fittings, conduit bodies, hazardous location fittings, and strut accessories. Their products are designed to provide superior corrosion protection, featuring a hot-dipped galvanizing process and UL listed Type 4X PVC-coated conduit bodies, ensuring durability in the most demanding environments.