QSC

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

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

★★★★★5.0 (1 reviews)

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

Pros & Cons

👍 Pros

1045 mild steel construction provides reliable strength and excellent weldability
Precision-machined threads ensure a clean, consistent 1/2-20 RH fitment
Sized specifically for 1" OD tubing, eliminating guesswork on compatibility
Compact design fits neatly inside the tube wall without protruding excessively

👎 Cons

Only fits one specific tube size (1" OD x .834 ID x .083 wall), limiting versatility
Mild steel is not corrosion-resistant and may require coating or paint in exposed environments
Requires welding equipment and skill to install properly
Single thread size means you need a different bung if your application calls for a different thread pitch

Frequently Asked Questions

What material is this weld-in bung made from?

It is constructed from 1045 mild steel, which offers a good balance of strength, weldability, and machinability for threaded insert applications.

What tube size does this bung fit?

It is designed to fit tubing with a 1" outer diameter, .834" inner diameter, and .083" wall thickness.

What is the thread size and direction?

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.

Does this bung need to be welded in place?

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.