Hillman Fasteners 540021 Compression Spring No. 7 12-pack

Product Description

The HILLMAN FASTENERS 540021 is a No. 7 compression spring sold in a 12-pack, designed for use as a conventional compression spring in general mechanical and trade applications. Built from durable steel, it follows a standard spring geometry that resists axial loads while returning to its original length when the load is removed. The pack arrives in a poly bag, making it practical for bench stock or field kits. Licensed tradespeople and maintenance technicians working across HVAC, plumbing, electrical, and general mechanical systems reach for this type of spring when a reliable, off-the-shelf compression spring is needed without special fabrication.

This compression spring suits a wide range of residential and light commercial service scenarios. It is appropriate wherever a standard compression spring is required — valve assemblies, control linkages, panel latches, and mechanical actuators across multiple trade disciplines. The pack quantity of 12 makes it a cost-effective choice for stocking a service vehicle or parts room.

Key Features

• Standard compression spring design provides reliable axial load resistance and return force
• Constructed from durable steel for strength and longevity in typical service environments
• Sold as a 12-pack in a poly bag for convenient storage and inventory management
• General-purpose sizing suitable for a broad variety of mechanical applications across trades

Compatibility

Designed as a general-purpose OEM-style compression spring suitable for a wide variety of mechanical assemblies across HVAC, plumbing, electrical, and related trade applications where a standard compression spring is required.

Installation Notes

Compression springs should be installed by a qualified technician familiar with the mechanical assembly being serviced. Always relieve system pressure and de-energize any connected equipment before disassembling spring-loaded components. Confirm spring seating and alignment before returning the assembly to service to prevent premature fatigue or displacement.