Collection: Speedflow 997 Series Female NPT Weld Bungs

Browse Speedflow 997 Series female NPT weld bungs for custom tank, pan and fluid-system fabrication. The listed options include aluminium, steel and stainless steel, with different size selections for each material.

Listed sizes and materials

• Aluminium: 1/8-inch NPT (997-02-D), 1/4-inch NPT (997-04-D), 3/8-inch NPT (997-06-D) and 1/2-inch NPT (997-08-D).
• Steel: 1/8-inch NPT (997-02-S).
• Stainless steel: 1/8-inch NPT (997-02-SS).

Choosing your weld bung

Match the female NPT thread to the correct male NPT fitting or sensor. Check the thread standard as well as the nominal size; do not select a fitting by diameter alone.

Choose a bung material compatible with the component it will be welded to. Check the bung dimensions, wall thickness, fitting engagement and surrounding clearance before fabrication. Confirm fluid compatibility, working pressure and temperature for the completed assembly.

Fabrication and installation

Have welding carried out by a suitably qualified fabricator. Welding preparation, process and filler selection must suit the confirmed materials and application; follow the manufacturer's guidance rather than applying one welding method to every material.

Follow the fitting or sensor manufacturer's instructions for thread sealing, sealant compatibility and tightening. Inspect and test the completed assembly before use.