1/2 UNF thread extension with carbon fiber - For muffler
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  • 1/2 UNF thread extension with carbon fiber - For muffler
  • 1/2 UNF thread extension with carbon fiber - For muffler
  • 1/2 UNF thread extension with carbon fiber - For muffler
  • 1/2 UNF thread extension with carbon fiber - For muffler

1/2 UNF thread extension

€8.99
No tax

UNF 1/2 Male/Female Extension – Compatible with 4.5mm, 5.5mm, and 6.35mm Calibers

Specifications:

  • Length: 26 mm
  • Outer Diameter: 23 mm (± 0.1 mm tolerance)
  • Inner Diameter: 6.55 mm
Quantity
Last items in stock

1/2 UNF Male/Female Thread Extension — 4.5 / 5.5 / 6.35 mm Calibers

1/2 UNF male/female thread extension, designed to suit 4.5 mm, 5.5 mm and 6.35 mm caliber projectiles. It improves the versatility of your equipment, fitting easily into different shooting systems.

Specifications

  • Thread: 1/2 UNF male/female
  • Length: 26 mm
  • Diameter: 23 mm (0.1 mm tolerance)
  • Internal diameter: 6.55 mm
  • Compatible with 4.5 mm, 5.5 mm and 6.35 mm calibers
  • French-made, 3D printed

Why choose this thread extension

This 1/2 UNF male/female extension improves the versatility of your equipment: it fits easily into different shooting systems and suits 4.5 mm, 5.5 mm and 6.35 mm caliber projectiles. Its optimized dimensions (26 mm length, 23 mm diameter with a 0.1 mm tolerance, 6.55 mm internal diameter) ensure a precise fit and a solid hold, so the accessory stays firmly in place during use.

Made in France using 3D printing, it offers both strength and precision, with a careful, artisanal approach to manufacturing. The male/female design lets you extend or adapt your setup without changing the rest of your equipment, which makes it a practical solution for a variety of configurations. It's the ideal accessory for those looking for a quality adapter that is reliable and well-fitted. An aluminum version is also available in the shop, if you prefer a metal option for your build.

Compatibility

  • 1/2 UNF thread (male/female)
  • 4.5 mm, 5.5 mm and 6.35 mm caliber projectiles
  • Various 1/2 UNF-standard shooting systems

Please check the thread and caliber matching your equipment before ordering, as compatibility depends on your specific setup. If you have any doubt, our customer service is available to help you choose the right adapter.

Made in France

Made in France using 3D printing, this thread extension is part of our adapters range. Designed and produced in-house by Invent3D, for a strong and precise accessory. 🇫🇷

Shipping

Your thread extension is shipped quickly and carefully packaged. 📦

EXT-UNF-01

Data sheet

Filetage
UNF 1/2 20

Avis clients

4.0 /5
(2 avis)
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Gonzalo F. 13/04/2026
"Pratique mais attention "
Raccord adaptateur pratique mais attention à ne pas trop serrer et ne pas mettre RDS trop lourd !
Gonzalo F. 28/05/2025
"Vivement les imprimantes 3D aluminium"
Le mien a cassé à la jointure du filetage mâle au bout de 5 montages .