Hillman Fasteners 540066 Extension Spring 22 6 Pack

Product Description

The HILLMAN FASTENERS 540066 is a No. 22 extension spring designed for conventional tension-load applications across trade and light industrial use. Built from steel with a zinc finish for basic corrosion resistance, this spring follows a standard open-hook extension design that stretches under load and returns to its resting length when released. Each package contains 6 springs packed in a poly bag, making it a practical stock item for service trucks and shop inventory. HVAC techs, plumbers, electricians, and general contractors reach for extension springs like this when rigging access panels, counterbalancing components, or securing tension-loaded assemblies.

Extension springs in this size class see use across a wide range of light-duty applications in residential and commercial service work. Common install scenarios include HVAC equipment access door latches, electrical panel spring clips, plumbing fixture tensioners, and general mechanical assemblies where a return-force spring is needed. The zinc finish provides adequate protection in dry or mildly humid indoor environments. The poly-bag pack of 6 suits service techs who need on-hand replacements without ordering single units.

Key Features

• Standard extension spring design provides consistent return-tension under load
• Steel construction with zinc finish for basic corrosion resistance
• Sold in a pack of 6 for efficient restocking and field use
• Packaged in a poly bag to keep springs together and free of debris
• Suitable for a broad range of light-duty trade applications

Compatibility

Designed as a general-purpose replacement or stock extension spring for light-duty residential and commercial applications where a No. 22 standard extension spring is specified.

Installation Notes

Extension springs should be installed by qualified trade personnel familiar with tension-load assemblies. Always relieve any existing tension in the system before removing a worn or broken spring. Use appropriate pliers or spring hooks to seat the open hooks securely on anchor points. Inspect mounting anchors for wear or deformation before installing new springs.