TIG back cap – T17/T26

What is a TIG torch back cap?

A TIG torch back cap threads onto the rear of your T17 or T26 TIG torch body. It seals the gas path and holds the collet and tungsten electrode securely in place while you weld.

Which torches does this back cap fit?

This back cap fits T17 and T26 TIG torches directly, threading straight onto the existing torch body with no adaptor needed.

Long or short back cap: which one do I need?

Choose the long back cap when you want extra tungsten length in reserve, or prefer holding the torch further back from your work. Choose the short back cap for tight spaces where clearance around the torch is limited.

Why does a back cap need replacing?

A cracked or loose back cap breaks the gas seal. Shielding gas escapes and air reaches the arc, so you get porosity and a dull, contaminated weld. It's worth keeping a spare on hand.

Frequently asked questions

What does a TIG torch back cap do?

It seals the rear of the torch body and holds the collet and tungsten electrode in place, keeping the gas path airtight while you weld.

Is the long or short back cap better for TIG welding?

Neither is better on its own — it depends on access. Use the long cap for extra reach and tungsten storage, and the short cap where you're working in a confined space.

Do T17 and T26 torches use the same back cap?

Yes, this back cap fits both T17 and T26 torch bodies directly, in either the long or short length.

How do I know my back cap needs replacing?

Watch for a loose thread, a visible crack, or gas escaping around the cap. Any of these break the seal and affect your weld quality.

Can I swap between long and short back caps on the same torch?

Yes. Both lengths thread onto the same T17/T26 torch body, so you can switch depending on the job.

In stock and ready to ship from Amalgum Welding Shop. Add your length to the cart and check out online.