Weld-On Fittings

Weld-on Filler Neck and Cap

If you're building a tank or vessel that requires a removable threaded cap, then this is it! Made with 6061 aluminum and easily welds to whatever you need. Perfect for use on custom fuel cells, overflow tanks, and more!

O2 Sensor Weld Bung (Steel)

Finish Line Factory O2 Sensor Weld Bungs are a must-have when building a new exhaust system for your car or if you're converting an older car to use fuel injection.

O2 Sensor Weld Bung (Stainless Steel)

Finish Line Factory O2 Sensor Weld Bungs are a must-have when building a new exhaust system for your car or if you're converting an older car to use fuel injection.

O2 Sensor Weld Bung (Aluminum)

Finish Line Factory O2 Sensor Weld Bungs are a must-have when building a new exhaust system for your car or if you're converting an older car to use fuel injection.

NPT Weld Bung (Steel)

Finish Line Factory's precision made, high quality NPT Weld Bungs are ideal for the delivery of fuel, oil, water, air, or any fluid of your choice.

NPT Weld Bung (Stainless Steel)

Finish Line Factory's precision made, high quality NPT Weld Bungs are ideal for the delivery of fuel, oil, water, air, or any fluid of your choice.

NPT Weld Bung (Aluminum)

Finish Line Factory's precision made, high quality NPT Weld Bungs are ideal for the delivery of fuel, oil, water, air, or any fluid of your choice.

Barbed Weld Bung (Aluminum)

Finish Line Factory’s precision made, high quality Barb Weld Bungs are ideal for the delivery of fuel, oil, water, air, or any fluid of your choice. Perfect for situations where using a threaded attachment may not be necessary.

AN Weld Bung (Steel)

Finish Line Factory's precision made, high quality AN Weld-on Bungs are ideal for the delivery of fuel, oil, water, air, or any fluid of your choice.

AN Weld Bung (Aluminum)

Finish Line Factory's precision made, high quality AN Weld-on Bungs are ideal for the delivery of fuel, oil, water, air, or any fluid of your choice.

AN Weld Bung - Stainless Steel

Finish Line Factory's precision made, high quality AN Weld-on Bungs are ideal for the delivery of fuel, oil, water, air, or any fluid of your choice.