Gardner Spring MB0500-018-S Belleville Disc Spring

Product Description

The GARDNER SPRING MB0500-018-S is a Belleville disc spring manufactured from stainless steel, designed to deliver precise load and deflection performance in compact fastening and clamping assemblies. With a 0.5 inch outer diameter, a 0.255 inch inner diameter, and an overall height of 0.034 inches, this conical washer-style spring fits applications where space is tightly constrained. It provides a rated load of 4.5 pounds at its working deflection of 0.019 inches. Maintenance technicians, mechanical assemblers, and field service professionals in HVAC, plumbing, and industrial equipment applications install these springs as load-bearing elements in bolted joints, valve stacks, and precision assemblies.

This disc spring is sized for use with a 1/4 inch bolt and suits residential and light commercial mechanical systems where consistent spring force must be maintained over repeated compression cycles. Common installation scenarios include valve packing glands, pump assemblies, pressure relief stacks, and vibration-damping bolt clusters. The stainless steel construction makes it appropriate for environments subject to moisture, mild corrosives, or elevated temperature cycling. Sold individually with a package quantity of 12 units per pack.

Key Features

• Stainless steel construction resists corrosion in wet or thermally cycled environments
• 0.5 inch outer diameter and 0.255 inch inner diameter for 1/4 inch bolt applications
• 4.5 pound rated load at 0.019 inch deflection for predictable spring force
• Low-profile 0.034 inch overall height suits tight axial clearance requirements
• Conical disc geometry maintains consistent clamping force under dynamic loads

Compatibility

Designed for use with 1/4 inch bolts. Suitable as an OEM-style or replacement Belleville disc spring in mechanical assemblies requiring a 0.5 inch OD conical washer spring.

Installation Notes

Installation is typically performed by licensed mechanical technicians or qualified assemblers. De-energize and depressurize the system completely before disassembling any joint or valve stack that contains disc springs. When stacking multiple Belleville springs, verify series versus parallel orientation against the original equipment specification to achieve the correct load and deflection curve. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the surrounding fastener assembly.