NSI Industries 1065-RT - Mighty-Seal 1-1/4" to 3/4" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for Use in Wet Locations.
NSI Industries

1065-RT

UPC: 781747140654


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Overview

NSi Industries Mighty-Seal 1065-RT raintight reducing washers provide a reliable, UL-listed solution for transitioning between raceway sizes in wet or outdoor environments. Each kit includes one coated and one uncoated galvanized steel washer, ensuring compatibility with standard 1-1/4" and 3/4" knockouts while maintaining NEMA 3R enclosure integrity. These washers are sunlight-resistant and designed for use in wet locations, preventing water ingress that can compromise electrical or mechanical systems. Key specifications include galvanized steel construction for corrosion resistance, a reducing size transition from 1-1/4" to 3/4", and compliance with NEMA 3R standards for outdoor-rated enclosures. The dual-coating system (one coated, one uncoated washer) ensures a secure mechanical connection while accommodating varying surface conditions. These washers are ideal for electrical raceways, conduit systems, and mechanical assemblies where size transitions are required without sacrificing weatherproofing. Unlike standard reducing washers, the Mighty-Seal 1065-RT maintains raceway integrity by preventing moisture penetration, which is critical in outdoor installations, industrial facilities, or any application exposed to the elements. The galvanized steel construction provides long-term durability, reducing the need for replacements in harsh environments. With a UL listing and NEMA 3R rating, these washers meet stringent safety and performance standards for electrical enclosures. Applications include outdoor electrical panels, HVAC systems, telecommunications enclosures, and industrial machinery where size transitions between raceways are necessary. The 1065-RT is part of NSi Industries' Mighty-Seal series, known for its reliability in maintaining enclosure ratings and preventing water damage. For projects requiring precise size transitions with weatherproofing, the 1065-RT delivers a proven solution backed by UL certification and NEMA compliance.
  • UL-listed and NEMA 3R rated for outdoor/wet locations
  • Includes one coated and one uncoated galvanized steel washer
  • Maintains raceway integrity by preventing moisture ingress
  • Sunlight-resistant and corrosion-resistant galvanized steel
  • Size transition from 1-1/4" to 3/4" for raceway compatibility

Specifications

Application
For maintaining wet locations seal on rated enclosures. Coated Washer installs on outside of 3R rated enclosure. Uncoated washer should be installed inside to maintain raceway continuity. Center reducing washers in middle of knock-out. Listed for use with Wet Location Connectors, or Threaded Rigid Conduit (amp, IMC) with standard locknuts. Patented
Color
Green, Silver
Finish
Ball burnish
Material
Galvanized Steel/Rubber
Special Features
Sun Resistant
Standard
cULus
Type
Raintight Reducing Washer
Package Dimensions (L x W x H)
7 IN x 5 IN x 0.01 IN
Package Dimensions (L x W x H)
17.78 cm x 12.7 cm x 0.254 mm
Package Weight (Imperial)
0.066 L
Package Weight (Metric)
0.030 kg
Mighty-Seal® 1-1/4" to 1" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.

1066-RT

Mighty-Seal® 1-1/4" to 1" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.
Mighty-Seal® 2" to 1-1/4" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.

1074-RT

Mighty-Seal® 2" to 1-1/4" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.
Mighty-Seal 2" to 1/2" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for Use in Wet Locations.

1071-RT

Mighty-Seal 2" to 1/2" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for Use in Wet Locations.
Mighty-Seal® 2" to 1" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.

1073-RT

Mighty-Seal® 2" to 1" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.
Mighty-Seal 1" to 3/4" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for Wet Locatons.

1063-RT

Mighty-Seal 1" to 3/4" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for Wet Locatons.
Mighty-Seal 3/4" to 1/2" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.

1061-RT

Mighty-Seal 3/4" to 1/2" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.
Mighty-Seal® 1-1/4" to 1/2" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.

1064-RT

Mighty-Seal® 1-1/4" to 1/2" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.
Mighty-Seal 1" to 1/2" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for Use in Wet Locations.

1062-RT

Mighty-Seal 1" to 1/2" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for Use in Wet Locations.
Mighty-Seal®2" to 3/4" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.

1072-RT

Mighty-Seal®2" to 3/4" Raintight Reducing Washers. Product contains one coated and one uncoated galvanized steel reducing washer. Maintains Raceway Integrity. Sunlight Resistant. Suitable for use in Wet Locations.
Washer, Reducing, Galvanized Steel, Size 4 Inch - 1-1/2 Inch

1090-5

Washer, Reducing, Galvanized Steel, Size 4 Inch - 1-1/2 Inch
Washer, Reducing, Galvanized Steel, Size 3 1/2 Inch - 3/4 Inch

1089-2

Washer, Reducing, Galvanized Steel, Size 3 1/2 Inch - 3/4 Inch
Washer, Reducing, Galvanized Steel, Size 3-1/2 Inch - 2-1/2 Inch

1089-7

Washer, Reducing, Galvanized Steel, Size 3-1/2 Inch - 2-1/2 Inch

Frequently Asked Questions

What are the dimensions of the washers?

The dimensions are 1.05 inches (A), 2.34 inches (B), and 1.38 inches (C).

Is the product suitable for wet locations?

Yes, it is suitable for use in wet locations.

What materials are used in the product?

The product is made of galvanized steel with an EPDM rubber coating.

What is the trade size of the washers?

The trade size is 1-1/4 inch to 3/4 inch.

What is the standard package quantity?

The standard package quantity is 200 units.

What is the product's application?

It is used for maintaining wet location seals on rated enclosures.

What certifications does the product have?

It has UL and cUL certifications and meets NEMA Standard FB-1.

What is the UPC number for this product?

The UPC number is 78174714065.

How should the coated washer be installed?

The coated washer should be installed on the outside of a 3R rated enclosure.

How should the uncoated washer be installed?

The uncoated washer should be installed inside to maintain raceway continuity.

How to Install the Mighty-Seal™ Sealing Reducing Washer

This guide provides step-by-step instructions for installing the Mighty-Seal™ Sealing Reducing Washer to ensure a wet-location seal in enclosures.

Estimated time: 30m

Tools needed:

Channel lock pliers, Locknut wrench

Supplies needed:

Mighty-Seal™ Sealing Reducing Washer, Traditional reducing washer, Conduit locknut

  1. Determine the trade size

    Identify the proper trade size of the Mighty-Seal™ Sealing Reducing Washer needed for your installation.

  2. Install the washer onto the fitting

    Place the Mighty-Seal™ Sealing Reducing Washer onto the fitting, ensuring it is positioned correctly for installation.

  3. Insert the fitting through the enclosure

    Insert the fitting through the enclosure with the Mighty-Seal™ Sealing Reducing Washer on the outside and the traditional reducing washer on the inside. Ensure both washers are centered in the knockout opening.

  4. Secure the fitting

    Tighten the locknut hand tight, plus two full additional turns using channel lock pliers or a locknut wrench to ensure a secure connection. Avoid using a hammer and screwdriver to prevent misalignment.

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