Tapco 904939-0020A Bonnet Nut

Product Description

The TAPCO 904939-0020A is a bonnet nut used to secure valve bonnet assemblies in place during service and operation. This small but critical fastener maintains the sealed connection between the bonnet and valve body, preventing leaks and ensuring proper mechanical integrity. It is typically installed by licensed plumbers and HVAC technicians working on valve assemblies in residential and light commercial systems. At 0.035 pounds, it is a compact, lightweight component suited for close-quarter installations where precise thread engagement is required.

The 904939-0020A bonnet nut is appropriate for valve maintenance and replacement applications where the original fastener has been damaged, stripped, or lost. It fits into service scenarios involving shutoff valves, control valves, and similar bonnet-style valve bodies found in plumbing and HVAC piping systems. When sourcing replacement hardware, matching the thread pitch and seat dimensions to the original valve specification is essential for a proper fit.

Key Features

• Secures bonnet-to-valve body connection for leak-free operation
• Lightweight at 0.035 pounds for easy handling in tight spaces
• OEM part number ensures direct fitment to compatible valve assemblies
• Suitable for maintenance and replacement service work

Compatibility

Designed as an OEM-style replacement bonnet nut for compatible valve assemblies requiring part number 904939-0020A.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician. Shut off the water or fluid supply and relieve system pressure before removing or replacing any valve hardware. Use the appropriate wrench size to avoid rounding the nut during tightening. Follow applicable IPC or IFGC guidelines for valve service in pressurized systems.

Technical Specifications

• Weight: 0.035 pounds

Standard Information

• Brand: TAPCO
• Manufacturer Part Number: 904939-0020A