Gardner Spring MB1375-044 Belleville Disc Spring

Product Description

The GARDNER SPRING MB1375-044 is a Belleville disc spring engineered for high-load applications in compact axial spaces. It features a 1.375-inch outer diameter, a 0.692-inch inner diameter, and an overall assembled height (OAH) of 0.088 inches. At its rated deflection of 0.034 inches, this spring delivers a load of 6,594.9 pounds, making it well suited for bolted joint preloading, valve assemblies, and mechanical fastening systems that require consistent, repeatable clamp force. Constructed from steel, it is installed by mechanical assemblers, maintenance technicians, and precision equipment builders working across industrial and commercial applications.

This disc spring is designed for use in bolted connections requiring an 11/16-inch bolt size. Its conical washer geometry allows multiple springs to be stacked in series for increased deflection or in parallel for increased load capacity. Typical install scenarios include flange bolt assemblies, pump housings, actuator mechanisms, and any application where thermal cycling or vibration would otherwise cause bolt load relaxation over time.

Key Features

• High load capacity of 6,594.9 pounds at 0.034 inches of deflection in a compact form factor
• 1.375-inch outer diameter with 0.692-inch inner diameter for 11/16-inch bolt compatibility
• Overall assembled height of 0.088 inches allows use in space-constrained assemblies
• Steel construction provides durability under repeated compression cycles
• Stackable in series or parallel configurations to tune load and deflection characteristics

Compatibility

Sized for use with 11/16-inch bolts. Designed as an OEM-style replacement or direct-fit Belleville disc spring for bolted joint and mechanical fastening assemblies requiring a 1.375-inch OD conical washer spring.

Installation Notes

Installation is typically performed by mechanical technicians or assembly personnel using standard hand tools and torque wrenches. Ensure the mating bolt, nut, and seating surfaces are clean and free of burrs before installing the spring. De-energize or depressurize the assembly before servicing any components under preload. When stacking multiple disc springs, verify orientation (series vs. parallel) against the load-deflection requirements of the application before final torque is applied.