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NSI Industries 1089-5 - Washer, Reducing, Galvanized Steel, Size 3 1/2 Inch - 1 1/2 Inch
NSI Industries

1089-5

UPC: 781747108951


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Overview

The NSi Industries Galvanized Steel Reducing Washer (SKU: 1089-5) is a precision-engineered mechanical fastener designed to bridge connections between pipes, bolts, or mounting surfaces of differing diameters. Manufactured from high-quality galvanized steel, this washer provides superior corrosion resistance and long-term durability in industrial, construction, and structural applications. Its unique reducing design transitions from a 3.5-inch outer diameter to a 1.5-inch inner diameter, enabling seamless integration between components with mismatched sizing. This washer ensures a secure, vibration-resistant fit for professional installations where precise alignment and load distribution are critical. Common applications include plumbing systems, HVAC installations, structural steel assemblies, and machinery mounting where diameter transitions are required. The galvanized coating meets ASTM standards for corrosion protection, making it ideal for outdoor or high-moisture environments. Unlike standard flat washers, the reducing design eliminates the need for additional adapters, reducing installation time and potential failure points. Compatible with standard hardware sizes, this washer is a cost-effective solution for adapting 3.5-inch fittings to 1.5-inch bolts or pipes.
  • Material: High-quality galvanized steel for superior corrosion resistance
  • Size: Transitions from 3.5" outer diameter to 1.5" inner diameter
  • Applications: Ideal for plumbing, HVAC, structural steel, and machinery mounting
  • Design: Reducing washer eliminates need for additional adapters
  • Durability: Galvanized coating meets ASTM corrosion protection standards

Specifications

Application
Galvanized steel reducing washers used in pairs to reduce size of knockout holes in box or enclosure.
Color
Galvanized
Inside Diameter
2 IN
Material
Steel
Outside Diameter
5 in
Size
3 1/2 - 1 1/2 in
Standard
CSA, UL
Type
Reducing Washer
Package Weight (Imperial)
0.320 L
Package Weight (Metric)
0.145 kg
Washer, Reducing, Galvanized Steel, Size 3 Inch - 2 1/2 Inch

1088

Washer, Reducing, Galvanized Steel, Size 3 Inch - 2 1/2 Inch
A reducing washer for indoors or outdoors use to reduce the size of the knockout in a steel outlet box or other metal enclosure. It is made of steel with a zinc plated finish. The washer has an inside diameter of 2.940 in and an outside diameter of 4.490 in.

33443

A reducing washer for indoors or outdoors use to reduce the size of the knockout in a steel outlet box or other metal enclosure. It is made of steel with a zinc plated finish. The washer has an inside diameter of 2.940 in and an outside diameter of 4.490 in.
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 4 Inch - 1 1/4 Inch

1090-4

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

1090-1

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

1089-3

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

1089-8

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

1089-4

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

Frequently Asked Questions

What are the dimensions of the washer?

Dimension A is 5 inches, Dimension B is 2 inches, and Dimension C is 4.060 inches.

Where is this product manufactured?

This product is manufactured in the USA.

What is the standard package quantity for these washers?

The standard package quantity for these washers is 10 units.

What is the Catalog ID for this product?

The Catalog ID for this product is 1089-5.

What is the trade size of this product?

The trade size for this reducing washer is 3-1/2 inches - 1-1/2 inches.

What material are the reducing washers made from?

The reducing washers are made from galvanized steel.

What is the primary application of these washers?

These galvanized steel reducing washers are used in pairs to reduce the size of knockout holes in a box or enclosure.

Where is this product manufactured?

This product is manufactured in the USA.

What is the primary application of these washers?

These galvanized steel reducing washers are used in pairs to reduce the size of knockout holes in a box or enclosure.

What material are the reducing washers made from?

The reducing washers are made from galvanized steel.

Frequently Asked Questions about NSI Industries

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Tork offers a comprehensive range of technical support services, including 24/7 customer support, on-site service management, and a technical hotline network. With three advanced technical support centers and over 8,000 hours of technical training conducted annually, Tork ensures certified expertise across 25+ languages to assist customers effectively. Their commitment to service is reflected in a 98% Service Level Agreement compliance rate, providing reliable support for all operational needs.

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