Value Collection 21678 Extension Spring 3/8 in Od Pack 15

Product Description

The VALUE COLLECTION 21678 is a steel extension spring rated at 2.1 lb/in, with an outside diameter of 0.375 inches and an overall length of 2.5625 inches (2-9/16 inches). Extension springs store and release energy under tensile load, pulling two components together or returning a mechanism to its resting position. This spring is sold in a package of 15 units, making it suitable for shop stock, maintenance kits, or batch repair applications. Installation is performed by mechanical and maintenance technicians working across HVAC equipment, industrial machinery, and general mechanical assemblies.

This extension spring fits applications requiring a compact, small-diameter spring with a moderate spring rate. Typical uses include control linkages, door mechanisms, latch assemblies, and tensioning components found in light industrial and commercial equipment. The 2.1 lb/in rate provides consistent return force for low-to-medium load applications. The 15-piece package quantity supports multi-unit service calls or stocking requirements in maintenance environments.

Key Features

• Steel construction for durability in mechanical and industrial service environments
• 2.1 lb/in spring rate for consistent, predictable tensile force
• 0.375-inch outside diameter fits compact assemblies with limited clearance
• 2-9/16-inch overall length suitable for short-travel tensioning applications
• Package of 15 supports shop stock and multi-unit service scenarios

Compatibility

Designed as an OEM-style replacement extension spring for light industrial, commercial, and mechanical assemblies requiring a 3/8-inch OD steel spring with a 2.1 lb/in spring rate.

Installation Notes

Extension springs should be installed by qualified mechanical or maintenance technicians. De-energize or lock out any powered equipment before replacing springs in moving assemblies. Use appropriate hooked or looped end tooling to seat the spring without overextending the coils. Never stretch an extension spring beyond its maximum safe extension to avoid permanent deformation or failure.