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QSC

QSC 1/2-20 RH Threaded Weld-In Bung Adapter

A precision-machined 1045 mild steel weld-in bung for secure 1/2-20 RH threaded connections.

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Overview

The QSC 1/2-20 RH Threaded Weld-In Bung Adapter is a precision-machined steel insert designed to be welded into the end of a tube, creating a permanent female threaded receptacle. Made from 1045 mild steel, it offers strong mechanical properties and welds cleanly with standard MIG or TIG processes. The 1/2-20 right-hand fine thread is a widely used specification in automotive, motorsport, and industrial linkage applications where a rod end or bolt needs a secure mounting point inside tubular structures.

This bung is engineered to fit tubing with a 1" outer diameter, .834" inner diameter, and .083" wall thickness. The tight dimensional tolerances ensure a proper press-fit before welding, which helps with alignment and produces a stronger finished joint. Because it is made from mild steel rather than stainless or alloy steel, it is best suited for applications where the assembly will be painted, coated, or otherwise protected from moisture exposure. For builders fabricating control arms, tie rods, or other threaded-tube assemblies, this bung provides a reliable and cost-effective solution.

Key Features

Material: 1045 Mild Steel

Fits Tube Size 1" OD X .834 ID X .083 Wall

Thread Size 1/2-20 RH

Specifications

Brand
QSC
Material
1045 Mild Steel
Thread Size
1/2-20 RH
Tube Size Compatibility
1" OD x .834" ID x .083" Wall
Connector Type
Weld-in
Exterior Finish
Alloy Steel

Frequently Asked Questions

It is constructed from 1045 mild steel, which offers a good balance of strength, weldability, and machinability for threaded insert applications.
It is designed to fit tubing with a 1" outer diameter, .834" inner diameter, and .083" wall thickness.
The bung features a 1/2-20 right-hand (RH) thread, which is a standard fine-thread specification commonly used in suspension and steering linkage applications.
Yes, this is a weld-in adapter designed to be permanently welded into a tube end, providing a threaded female receptacle for a corresponding bolt or rod end.

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