Aluminum Stepped NPT bungs

$4.25 - $5.75
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Aluminum Stepped NPT bungs

Bulk Pricing: Buy 12 ~ 24 at (-8%)

Bulk Pricing: Buy 12 ~ 24 at (-8%)

Bulk Pricing: Buy 25 ~ 50 at (-15%)

Bulk Pricing: Buy 51+ at (-20%)

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Description

Aluminum 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. Lightweight yet durable, these aluminum bungs are ideal for custom fabricators building fluid reservoirs, gas tanks, oil tanks, and more.

Each bung features a wide flange diameter to maximize weld surface area, ensuring a strong, secure bond when welding to aluminum components. Available in multiple sizes and configurations, these bungs are perfect for applications where weight savings and corrosion resistance matter—such as racing, off-road, or custom motorcycle builds.

Available Sizes & Pricing:

NPT Thread Overall Length Flange Diameter Stepped Diameter
1/8" NPT             1/2"               7/8"                    5/8"
1/4" NPT             1/2"                  1"                    3/4"
3/8" NPT             1/2"              1-1/4"                      1"
1/2" NPT           0.650"              1-1/4"                       1"

Features:

Made from aerospace-grade 6061-T6 aluminum

Lightweight with excellent strength-to-weight ratio

Precision-tapped NPT threads

Flanged design for increased weld area and secure installation

Ideal for custom fabrication of tanks, catch cans, and more

From motorcycle fuel tanks to off-road coolant reservoirs, these aluminum bungs provide the performance and reliability you need for your custom builds.

All sizes of 6061-T6 aluminum NPT weld-in bungs lined up for size comparison – 1/8", 1/4", 3/8", and 1/2"
Side-by-side view of 1/8" to 1/2" NPT aluminum weld bungs for custom gas, oil, and fluid tanks
6061-T6 aluminum NPT bungs in four thread sizes displayed together for visual size reference
All sizes of 6061-T6 aluminum NPT weld-in bungs lined up for size comparison – 1/8", 1/4", 3/8", and 1/2"
6061-T6 aluminum NPT bungs in four thread sizes displayed together for visual size reference
Aluminum Stepped NPT bungs
1/8" NPT 6061-T6 aluminum weld-in bung with flanged base for custom tank fabrication
1/4" NPT aluminum weld-in bung made from 6061-T6 round stock for lightweight custom builds
1/2" NPT weld-in aluminum bung – machined from 6061-T6 with large flange for strength and durability
3/8" NPT 6061 aluminum bung with wide flange for secure welds in fluid tank applications