Round-Base Spot Weld T-Nuts - Plain Steel

How does a round-base weld T-nut attach?

The round, flat base gives a broad, even contact area that spot-welds cleanly and securely to sheet metal, while the projecting threaded barrel forms the machine thread on the other side. The result is a permanent, captive nut that sits flush and will not spin or fall out, ideal for panels that need a reliable bolt-in point. Plain steel welds cleanly without plating interference, which is why bare steel is standard for weld nuts. For a finished part exposed to moisture, coat the assembly after welding.

Why choose round-base spot weld T-nuts

• Broad weld base: round flat base spot-welds evenly to sheet metal.
• Permanent captive thread: welded in place so it will not spin or fall out.
• Clean weld: bare steel welds without plating interference.
• Economical: unplated steel for dry, interior assemblies.

Common applications for round-base spot weld T-nuts

• Sheet metal panels and brackets
• Automotive and equipment fabrication
• Enclosures needing a permanent bolt-in thread
• Interior welded assemblies

For projection-style welds, see projection hex weld nuts, and browse every style on the main weld nuts category.

Round-Base Spot Weld T-Nuts FAQ

How is a round-base weld T-nut attached?

The round, flat base is spot-welded to the sheet metal, giving a broad, even weld. The threaded barrel then provides the machine thread on the other side.

Why choose a round base over a hex weld nut?

The round flat base gives a large, even contact area for a clean spot weld on flat sheet, while hex projection nuts use projections and a pilot for placement.

Are plain steel weld T-nuts good outdoors?

Plain steel can rust in damp conditions and is best for dry, interior use. Coat the assembly after welding if it will face moisture.