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QSC

QSC 3/4-16 RH Threaded Weld In Bung Steel Adapter

★★★★★4.7 (18 reviews)

Weld a precise 3/4-16 right-hand threaded connection point into 1-1/2" OD tubing with this QSC 1045 mild steel bung.

$8.25*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The QSC 3/4-16 RH Threaded Weld In Bung is a steel tube adapter designed to provide a permanent, precisely threaded connection point inside 1-1/2 inch OD tubing with 1.000 inch ID and 0.250 inch wall thickness. Manufactured from 1045 mild steel, it offers a balance of weldability and mechanical strength that makes it suitable for fabrication work on suspension linkages, roll cages, steering assemblies, and other structural applications where a threaded joint is needed inside a tube.

The right-hand 3/4-16 thread is machined prior to shipping, so once the bung is welded into place, it is ready to accept a matching rod end, bolt, or other threaded hardware without any additional tapping or machining. The precise tube sizing ensures the bung sits flush inside the specified tubing dimensions for a clean, strong weld. Because the material is mild steel rather than stainless or alloy, the bung should be protected with paint or coating if it will be exposed to moisture or corrosive environments.

Key Features

Material: 1045 Mild Steel

Fits Tube Size 1 1/2 OD X 1.000 ID X .250 Wall

Thread Size 3/4-16 LR

Specifications

Material
1045 Mild Steel
Thread Size
3/4-16
Thread Direction
Right Hand (RH)
Fits Tube OD
1-1/2 inch
Fits Tube ID
1.000 inch
Fits Tube Wall
0.250 inch
Exterior Finish
Alloy Steel
Brand
QSC

Pros & Cons

👍 Pros

  • 1045 mild steel construction provides strong weldability and good mechanical strength
  • Pre-threaded 3/4-16 RH insert eliminates the need to tap threads after welding
  • Precise sizing for 1-1/2 inch OD tubing ensures a flush, secure fit

👎 Cons

  • Only fits one specific tube size so it cannot be used with different diameter tubing
  • Requires welding equipment and skill for installation — not a bolt-on solution
  • 1045 mild steel is not corrosion-resistant and may require coating or paint in exposed environments

Frequently Asked Questions

It is designed for tubing with 1-1/2 inch OD, 1.000 inch ID, and 0.250 inch wall thickness.
It has a 3/4-16 right-hand thread.
It is manufactured from 1045 mild steel, which is weldable and offers good strength for structural applications.
No, the bung is sold as a standalone threaded weld-in insert. A compatible 3/4-16 RH threaded rod end or bolt must be purchased separately.

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