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12401101 - Tweco 24A-37-SS Flat Spot Welding Nozzle 3/8 Inch (Pack of 2)

Packaging: pack of 2
$14.76/EA $21.08/pack of 2 only $10.54/EASave 29%

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OVERVIEW

Tweco 1240-1101 (24A-37-SS) Spot Nozzle - Pack of 2

Maximize the versatility of your MIG welding equipment with the Tweco 24A-37-SS (Stock Code: 1240-1101). This nozzle is a specialized variant of the standard 24 Series adjustable slip-on nozzle, engineered specifically for Gas Metal Arc Spot Welding (GMASW). The defining feature of this unit is its "SS" or Spot/Stitch design, which culminates in a flat, non-tapered face. This geometry enables the welder to rest the nozzle directly on the base metal, stabilizing the gun and maintaining a fixed contact-tip-to-work distance (CTWD), which is critical for consistent spot weld penetration and diameter.

With a 3/8-inch (9.5 mm) bore, the 24A-37-SS provides a focused gas column ideal for the localized heating of spot welds. It is rated for use with standard Tweco gas diffusers and insulators found on Tweco Professional No. 3 (300A) and No. 4 (400A) air-cooled MIG guns. It is also fully compatible with the Tweco Spray Master 350 and 450 series. The slip-on fit relies on the friction provided by the gas diffuser's O-ring or spring, allowing for quick removal for cleaning spatter or replacing contact tips.

Manufactured from electrical-grade copper alloy, the nozzle withstands the intense radiant heat generated during the spot welding process. The wall thickness is designed to endure the mechanical stress of being pressed against workpieces repeatedly. This product is supplied as a pack of 2, making it a cost-effective addition to your consumables inventory. For shops performing stitch welding or plug welding on thin-gauge materials, this nozzle provides the mechanical guide needed for professional results without the need for complex fixturing.

Technical Specifications

  • Part Number: 1240-1101 (24A-37-SS)
  • Bore Diameter: 0.375" (9.5 mm)
  • Nozzle Style: Flat / Spot
  • Connection: Adjustable Slip-On
  • Compatibility: Tweco 24 Series (Guns #3, #4, Spray Master)
Additional Information
Brand:Tweco
Item:Nozzle
Packaging Description:pack of 2
Fits Which Model:Tweco Professional No. 3 & 4, Tweco Spray Master 350 & 450
Bore Size:3/8" (9.5 mm)
Nozzle Type:Spot Welding (Flat End), Adjustable Slip-On
Series:24 Series
Material:Copper Alloy
Part Number:24A-37-SS, 1240-1101

INCLUDED

  • 2 x Tweco 24A-37-SS Flat Arc Spot Nozzles (3/8" Bore)

APPLICATIONS

  • Automotive body panel repair and fabrication
  • Sheet metal spot welding (GMASW)
  • HVAC ductwork fabrication
  • Light gauge steel cabinet assembly
  • Stitch welding applications requiring flush contact

FAQ

The flat end allows the operator to press the nozzle flush against the workpiece, ensuring the gun is steady and the distance from the tip to the metal is constant, which is essential for consistent spot welds.

This nozzle fits Tweco Professional Series No. 3 and No. 4 guns, as well as Tweco Spray Master 350 and 450 series guns that use 24 Series consumables.

The bore size is 3/8 inch (0.375 inches or 9.5 mm).

This is an adjustable slip-on nozzle. It slides over the gas diffuser and is held in place by friction, allowing you to adjust the nozzle position.

This product (SKU 12401101) is sold as a package of 2 nozzles.

While you can, the flat end and smaller 3/8" bore are optimized for spot welding. For general welding, a tapered nozzle with a larger bore might provide better visibility and gas coverage for moving puddles.

It uses the standard 24 Series insulator (often part number 34A) found on Tweco No. 3 and No. 4 guns.

In this context, 'SS' typically stands for Spot/Stitch or Short Stop, indicating its design for spot welding applications.