Gardner Spring 37091GS Extension Spring 18 Lb 3/4 in Od

Product Description

The GARDNER SPRING 37091GS is a stainless steel extension spring designed for light-to-medium tension applications across mechanical, industrial, and HVAC-related assemblies. With an outside diameter of 0.75 inches, a wire diameter of 0.075 inches, and a spring rate of 5.83 pounds per inch, this spring delivers consistent, predictable return force. The maximum work load is 18 pounds, and the maximum extended length is 5.75 inches. The plain finish on the stainless steel construction offers solid corrosion resistance for environments where moisture or chemical exposure is a concern. Each package contains 3 pieces.

This extension spring suits residential and commercial applications where controlled tension and reliable cycling are required. Common use cases include HVAC damper assemblies, equipment panel latches, mechanical linkages, and general industrial tensioning. The 3-inch free length and 2-pound initial tension make it appropriate for assemblies requiring a snug, pre-loaded fit before extension force is applied. Trades that frequently work with this type of spring include HVAC technicians, millwrights, and maintenance mechanics.

Key Features

• Stainless steel construction with plain finish for corrosion resistance
• Spring rate of 5.83 pounds per inch for predictable, linear extension force
• Maximum work load of 18 pounds with a maximum extended length of 5.75 inches
• 2-pound initial tension provides pre-loaded snug fit in assemblies
• 0.75 inches outside diameter and 0.075 inches wire diameter for compact fitment
• Sold in a package of 3 pieces

Compatibility

Designed as a standard replacement or stock extension spring for mechanical assemblies requiring a 0.75-inch OD, 3-inch free length spring with an 18-pound maximum work load.

Installation Notes

Installation should be performed by a qualified technician familiar with spring-tensioned assemblies. Relieve all existing tension and de-energize any connected equipment before removing or installing the spring. Use appropriate tools such as spring hooks or pliers rated for the load - never overstretch the spring beyond the maximum extended length of 5.75 inches, as permanent deformation will result. Follow all applicable equipment manufacturer guidelines for spring replacement procedures.