Tech Products 51556-3 Vibration Isolator 690 Lb Stud/stud

Product Description

The TECH PRODUCTS 51556-3 is a heavy-duty stud/stud vibration isolator rated for a maximum load capacity of 690 pounds. Built in a round profile, this isolator measures 3.125 inches in diameter and 3 inches in height, with a 1/2-13 threaded stud configuration and a thread length of 1.625 inches on each end. It is designed to reduce structure-borne vibration and noise transmission between mechanical equipment and the surfaces they mount to. HVAC technicians, plumbers, and mechanical contractors rely on isolators like this one when mounting compressors, pumps, fans, and similar rotating equipment in both residential and commercial applications.

This isolator is suited for installations where vibration attenuation is required between a piece of equipment and its support structure. Common applications include rooftop and ground-mounted HVAC equipment, hydronic pump sets, and mechanical room installations where vibration isolation is specified by design or required to meet building codes. The stud/stud mount style allows it to thread directly into both the equipment base and the mounting surface without additional hardware adapters.

Key Features

• 690 lb maximum load capacity for heavy mechanical equipment applications
• 1/2-13 threaded stud on both ends for secure, direct attachment to equipment and support structure
• 1.625 inch thread length provides sufficient engagement depth for reliable fastening
• Round profile at 3.125 inches diameter and 3 inches height fits standard mechanical equipment mounting footprints
• Stud/stud mount type eliminates need for additional adapter hardware during installation

Compatibility

Designed as an OEM-style replacement or new-installation vibration isolator for mechanical equipment requiring a 1/2-13 stud/stud mount with a 690 lb load rating.

Installation Notes

Installation is typically performed by licensed HVAC technicians or mechanical contractors. De-energize and lock out all equipment before mounting or replacing isolators. Ensure the mounting surface and equipment base threads are clean and free of debris before engagement. Verify that the combined equipment load does not exceed the 690 lb rated capacity of this isolator, and consult the equipment manufacturer specifications for the correct number of isolators required per installation.