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Aluminum Stepped NPT bungs
SNPT-AL$4.25 - $5.75Aluminum NPT Weld-In Bungs – 6061-T6 – Multiple Sizes Available Our 6061-T6 aluminum NPT weld-in bungs are expertly machined from high-strength round stock and tapped to your selected NPT thread size... -
Steel NPT Bungs
NPT 83$3.00 - $5.501018 Mild Steel NPT Weld-In Bungs – Multiple Sizes Available These NPT weld-in bungs are precision-machined from solid 1018 cold rolled mild steel bar stock, then drilled -
Stainless NPT Bungs
NPTss$3.75 - $5.50Stainless Steel NPT Weld-In Bungs – Precision Machined These stainless steel NPT weld-in bungs are machined from solid stainless steel bar stock, then drilled and tapped to -
Stepped NPT bungs
SNPT$4.25 - $8.001018 Mild Steel NPT Weld-In Bungs – Multiple Thread Sizes Available These weld-in NPT threaded bungs are precision-machined from solid 1018 cold rolled mild steel round stock -
Stainless Stepped NPT bungs
SNPT-SS$4.95 - $11.95Stainless Steel NPT Weld-In Bungs – Multiple Sizes Available Our premium 300 series stainless steel NPT threaded weld-in bungs are precision-machined from solid round stock and tapped to your...
Description
6061 Aluminum NPT Weld-In Bungs – Lightweight & Corrosion-Resistant
These NPT weld-in bungs are precision-machined from solid 6061-T6 aluminum bar stock and tapped to standard National Pipe Thread (NPT) specifications. Commonly used for fluid transfer systems, these aluminum bungs are ideal for welding into gas tanks, oil bags, overflow tanks, and custom fluid containers.
Lightweight yet strong, 6061-T6 aluminum offers excellent corrosion resistance and weldability—perfect for performance builds, motorcycles, off-road rigs, and custom fabrication projects where saving weight matters.
Available Sizes & Pricing:
| Part # | NPT Thread | Length | Material | Outer Diameter | Price |
|---|---|---|---|---|---|
| NPT186al | 1/8" NPT | 0.650" | 6061-T6 Aluminum | 3/4" | $3.75 |
| NPT147al | 1/4" NPT | 0.750" | 6061-T6 Aluminum | 3/4" | $4.75 |
| NPT381al | 3/8" NPT | 0.500" | 6061-T6 Aluminum | 1" | $5.50 |
Key Features:
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Machined from 6061-T6 aluminum for superior strength-to-weight ratio
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Tapped to NPT thread standards for universal fluid fitting compatibility
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Weld-in design for custom tanks, fuel cells, and oil reservoirs
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Excellent corrosion resistance—ideal for use with gasoline, oil, and other fluids
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Offered in multiple sizes to suit a variety of build requirements
Whether you're building a lightweight oil tank for your Harley or fabricating a custom coolant reservoir, these aluminum NPT bungs deliver professional-grade performance and a clean finish.