Gardner Spring MU312-0075-S Curved Disc Spring

Product Description

The GARDNER SPRING MU312-0075-S is a curved disc spring manufactured from stainless steel for use in mechanical assemblies requiring consistent, repeatable load response in a compact form factor. Curved disc springs, also called Belleville washers, store and release energy under axial load, making them well suited for bolt preload retention, vibration dampening, and dynamic fastening applications. This spring delivers a load of 0.8 pounds at its rated deflection of 0.043 inches, with an outer diameter of 0.49 inches and an inner diameter of 0.331 inches. Stainless steel construction provides corrosion resistance in wet, chemical-exposed, or outdoor environments.

This curved disc spring is used in precision mechanical, industrial, and OEM equipment assemblies where space is limited and controlled axial load is required. Typical applications include valve assemblies, pressure regulators, pump components, and fastener preload systems. The 5/16 inch bolt size compatibility makes it suitable for standard fastener stacks in HVAC equipment, plumbing hardware, and light industrial machinery. Installers working on equipment requiring spring-loaded fastener retention will find this part appropriate for both new assembly and field replacement work.

Key Features

• Curved disc spring design provides consistent axial load in minimal vertical space
• Stainless steel construction resists corrosion in wet and chemically exposed environments
• 0.8 pound load capacity at 0.043 inches of deflection for controlled spring force
• 0.49 inches outer diameter and 0.331 inches inner diameter for compact fitment
• Compatible with 5/16 inch bolt sizes for standard fastener stack applications
• Overall assembled height of 0.077 inches suits tight clearance installations

Compatibility

Designed for use with 5/16 inch bolt sizes in mechanical assemblies requiring a curved disc spring with a 0.49 inches outer diameter profile.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician familiar with spring-loaded fastener assemblies. Ensure the mating surfaces are clean and free of debris before seating the disc spring to maintain proper load distribution. Do not exceed the rated deflection, as over-compression can permanently deform the spring and reduce load performance. Follow the equipment manufacturer's torque specifications for the associated fastener when integrating this spring into a bolted assembly.