3/8-24 Male Thread TIG Torch Fitting Explained
By MIG/TIG/Stick Welders & Plasma Cutters | USA Weld – HTP ... | Published: 2026-10-30
Category: Buying Guides
Learn about the 3/8-24 male thread fitting on the 17 Series air-cooled TIG torch, including compatibility, setup, and when it is the right choice for your welding.
Quick answer
The 3/8-24 male thread fitting is the standard connection on the 17 Series (150A) air-cooled TIG torch, designed to attach to a power cable adapter (part 105Z57) that connects to a stud on your welding machine.
Why the 3/8-24 thread matters
This thread size is the industry standard for air-cooled TIG torches in the 150A range, providing a secure, gas-tight connection that withstands the heat and movement of manual welding. It is not a quick-connect fitting; it requires threading the adapter onto the torch before each use.
Compatibility with your welder
The 3/8-24 male thread fitting works with any welder that has a stud-type power cable adapter (part 105Z57). It is not compatible with Dinse-style or Euro-style connectors without an additional adapter. Check your machine's output stud size before ordering.
Decision rules for the 3/8-24 male thread fitting
- Check your machine's output: Look for a stud-type output on your welder. If it has a Dinse or Euro connector, you will need a separate adapter cable (not included).
- Order the correct adapter: The 17 Series torch requires part 105Z57 to connect to a stud. Without this adapter, the torch cannot be powered. Verify part 105Z57 is in stock or compatible with your welder before purchasing the torch.
- Expect a threaded connection: Unlike quick-connect gas fittings, the 3/8-24 thread is a manual screw-on connection. It is secure but takes a few extra seconds to attach.
Product facts
- 17 Series (150A) Air-Cooled Torch with 3/8"-24 RH Male Thread Fitting: 17 Series (150A) air-cooled torch with a 3/8-24 RH male thread fitting. Typically used with power cable adapter part number 105Z57. This confirms the torch is designed for direct stud connection, not for quick-connect gas fittings, so you need the correct adapter cable.
17 Series (150A) Air-Cooled Torch with 3/8"-24 RH Male Thread Fitting
Who should use this fitting
Best for
- Welders with a stud-type output on their machine who want a standard, reliable 150A air-cooled torch
- Users who prefer a threaded connection over quick-connect for a more secure gas seal
Not for
- Welders with Dinse or Euro connectors unless they also purchase the adapter cable
- Applications requiring a quick-change torch head or frequent swapping between torches
