Gardner Spring MB0937-030 Belleville Disc Spring

Product Description

The GARDNER SPRING MB0937-030 is a Belleville disc spring designed to deliver controlled load and deflection in compact fastener assemblies. With a 0.937 inch outer diameter, a 0.317 inch inner diameter, and an overall height of 0.06 inches, this conical washer-style spring fits tightly into space-constrained applications where conventional coil springs cannot. It is manufactured from steel and delivers a load of 2.5 pounds at its rated deflection of 0.019 inches. Maintenance technicians, millwrights, and mechanical assemblers working on HVAC equipment, pump assemblies, and industrial fastener stacks routinely install this type of spring to maintain preload under thermal cycling or vibration.

This Belleville disc spring is suited for use in residential and light commercial mechanical systems where a 5/16 inch bolt size is specified. Typical applications include bolt preload retention, valve seating, and vibration dampening in bolted flange and bearing retainer assemblies. Its small form factor makes it appropriate wherever axial space is limited and a precise, repeatable spring force is required. Package quantity is 12 pieces with a minimum order quantity of 1.

Key Features

• Steel construction for durability in mechanical and thermal cycling environments
• 0.937 inch outer diameter fits 5/16 inch bolt assemblies
• 2.5 pound load rating at 0.019 inch deflection for predictable preload performance
• Low-profile 0.06 inch overall height suits tight axial clearance applications
• Can be stacked in series or parallel to tune load and deflection characteristics

Compatibility

Designed as an OEM-style replacement or service Belleville disc spring for mechanical assemblies specifying a 5/16 inch bolt size, a 0.937 inch outer diameter, and a 0.317 inch inner diameter.

Installation Notes

Belleville disc springs are typically installed by millwrights, mechanical assemblers, or HVAC technicians during equipment assembly or scheduled maintenance. De-energize and lock out the equipment before disassembling any fastened joint. Verify spring orientation and stacking configuration against the original equipment drawing, as reversing or inverting the spring alters the load curve. Do not substitute a spring with a different OD, ID, or height without confirming the new load-deflection values meet design requirements.