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Weld-in Threaded Tube Adapters

CNC machined, high-strength chromoly threaded inserts for suspension, steering, and fabrication. The Chassis Shop brings you over 100 thread and size combinations

Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end

"Pro-werks tube adapters are a great product! I especially like the hex option."

-Another Satisfied Customer at the PRI Show

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks threaded weld-in tube end with tapered shoulder and plain shank, bare metal, overlay text reading 3/8" OD x .058 wall (0.259" ID)

Pro-werks 3/8" OD X .058” (0.259" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly weld-in round tube adapter with tapered body and internally threaded bore, for 1/2" OD x .058" wall tube (0.384" ID)

Pro-werks 1/2” OD X .058” (0.384" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly steel tubing weld-in round tube adapter with tapered body and internally threaded bore, for 5/8" OD x .058" wall tube (0.509" ID)

Pro-werks 5/8” OD X .058” (0.509" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly steel weld-in round tube adapter with tapered body and internally threaded bore, for 3/4" OD x .058" wall tube (0.634" ID)

Pro-werks 3/4” OD X .058” (0.634" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly steel weld-in round tube adapter with tapered body and internally threaded bore, for 3/4" OD x .065" wall tube (0.620" ID)

Pro-werks 3/4” OD X .065” (0.620" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly weld-in round tube adapter with tapered body and internally threaded bore, for 7/8" OD x .058" wall tube

Pro-werks 7/8” OD X .058” (0.759" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly weld-in tube adapter with tapered body and internally threaded bore, for 7/8" OD x .065" wall tube (0.745" ID)

Pro-werks 7/8” OD X .065” (0.745" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly steel tubing weld-in round tube adapter with tapered body and internally threaded bore, for 7/8" OD x .083" wall tube (0.709" ID)

Pro-werks 7/8” OD X .083” (0.709" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly weld-in tube adapter with tapered body and internally threaded bore, for 1" OD x .058" wall tube (0.884" ID)

Pro-werks 1” OD X .058” (0.884" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly steel tubing weld-in round tube adapter with tapered body and internally threaded bore, for 1" OD x .065" wall tube (0.870" ID)

Pro-werks 1” OD X .065” (0.870" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly steel weld-in round tube adapter with tapered body and internally threaded bore, for 1" OD x .083" wall tube (0.834" ID)

Pro-werks 1” OD X .083” (0.834" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly weld-in round tube adapter with tapered body and internally threaded bore, for 1-1/8" OD x .058" wall tube (1.009" ID)

Pro-werks 1-1/8” OD X .058” (1.009" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly steel weld-in round tube adapter with tapered body and internally threaded bore, for 1-1/8" OD x .065" wall tube (0.995" ID)

Pro-werks 1-1/8” OD X .065” (0.995" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly steel weld-in round tube adapter with tapered body and internally threaded bore, for 1-1/8" OD x .083" wall tube (0.959" ID)

Pro-werks 1-1/8” OD X .083” (0.959" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly weld-in round tube adapter with tapered body and internally threaded bore, for 1-1/4" OD x .095" wall tube (1.06" ID)

Pro-werks 1-1/4” OD X .095” (1.06" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly tube adapter with tapered body and internally threaded bore, for 1-1/4" OD x .120" wall tube (1.01" ID)

Pro-werks 1-1/4” OD X .120” (1.01" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly steel weld-in round tube adapter with tapered body and internally threaded bore, for 1-3/8" OD x .095" wall tube (1.185" ID)

Pro-werks 1-3/8” OD X .095” (1.185" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly weld-in round tube adapter with tapered body and internally threaded bore, for 1-3/8" OD x .120" wall tube (1.135" ID)

Pro-werks 1-3/8” OD X .120” (1.135" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly tube adapter with tapered body and internally threaded bore, for 1-1/2" OD x .120" wall tube (1.26" ID)

Pro-werks 1-1/2” OD X .120” (1.26" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Three Pro-Werks 4130N chromoly weld-in tube adapters for 1-3/4" OD x .120" (1.51" ID) tube size, fitted with gold rod ends, a zinc clevis and a small rod end Pro-Werks 4130N chromoly tube adapter with tapered body and internally threaded bore, for 1-3/4" OD x .120" wall tube (1.51" ID)

Pro-werks 1-3/4” OD X .120” (1.51" ID) Tube Size, Chromoly Steel 4130N Round Tube Adapter

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Weld-In Threaded Tube Adapters — Round & Hex, RH & LH Thread, 100+ Size Combinations

You may call them a tube end, spud, weld bung, threaded bung, or weld-in adapter — at The Chassis Shop we call them tube adapters. Their primary purpose is to be welded into tubing, providing a threaded connection for your rod end, heim joint, or threaded clevis. Pro-werks tube adapters are the perfect choice for fabricating 4-link bars, control arms, traction bars, steering linkage, and much more. With over 100 size and thread combinations available, you’ll find exactly what your build requires.

Pro-werks tube adapters are precision CNC machined from 4130N chromoly steel with ultra-fine finishes and super-tight tolerances — ensuring a proper fit in tubing during welding and high standards on thread sizing. There is so much riding on these components — it’s worth using the best parts available.

 

Round vs. Hex Tube Adapters

Pro-Werks round chromoly weld-in tube adapters — RH and LH thread configurations

  • Round Tube Adapters — the most popular configuration, providing the cleanest looking assembly and a flush weld-in fit inside your tubing. Available in RH and LH thread. The LH thread indicator groove provides quick clarification of thread direction during fabrication.
  • Hex Tube Adapters — the hex feature allows you to adjust the rotation of a link using a wrench after installation. Available on select left-hand thread sizes for ease of adjustment.

Pro-Werks hex chromoly tube adapters — wrench-adjustable left-hand threadPro-Werks hex tube adapter being adjusted with a wrench

 

Anatomy of a Great Tube Adapter

Anatomy of a Pro-Werks chromoly tube adapter — thread, body, and weld features explained

 

Round Chromoly 4130N Tube Adapters

Select the product matching your tube’s outside diameter (OD) and wall thickness. Each product is available in RH and LH thread configurations, in pack quantities or bags of 20.

Available in pack quantities as listed, or in conveniently packaged bags of 20 for volume users. Buy more, Save more! 

 

Unlock Savings with Quantity Mix-N-Match Discounts

Mix and match tube adapter sizes to hit quantity discount thresholds — just increase the quantity in your cart to earn extra savings across the entire tube adapter lineup.

 

Note: Welding should always be performed by a qualified welder.

Proudly Made in the USA.

Assorted polished steel weld in bungs and threaded tube ends in various sizes piled on a white background

Machined in the USA

There is so much riding on these components, it's worth using the best parts available.

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