Products List
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1/2" x 13 Stainless Stepped Handlebar Bung
SHBBSS$7.50 - $9.00Stainless Steel Stepped Weld-In Bung – 1/2"-13 Thread These heavy-duty stepped bungs are one of the largest options in our lineup, designed specifically for high-strength applications like custom T-bar fabrication or structural weld-in mounts... -
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. Lightweight yet durable, these aluminum... -
1/2" x 13 Stepped Handlebar Bung
SHBB12c$7.50 - $8.50Stepped Weld-In Bungs – Mild Steel – 1/2"-13 Thread for 1" & 1-1/4" Tubing These are two of the largest versions of our stepped weld-in bungs, designed to simplify fabrication and ensure a secure, clean fit in 1" or 1-1/4" x .120 wall... -
Wide Flange 1/2 x 20 Threaded Stepped Handlebar Bung
wfshbb12f$9.75Stepped 1/2"-20 Weld-In Bung for 1" & 1.25" Tubing – Mild Steel These large weld-in stepped bungs—also known as top hat bungs—are precision-machined for 1/2"-20 fine thread bolts, the same thread size commonly used for handlebar... -
Wide Flange 1/2 x 13 Threaded Stepped Handlebar bung
WFSHBB12C$9.75Stepped 1/2"-13 Weld-In Bung for 1" & 1.25" Tubing – Mild Steel These large weld-in stepped bungs—also known as top hat bungs—are precision-machined for 1/2"-13 coarse thread bolts, the same thread size commonly used for handlebar... -
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, drilled and tapped to your selected NPT thread size. Known for its... -
Stepped Blind tank bungs
SBTB$4.25Stepped Blind Tank Bungs – 1018 Mild Steel These stepped blind threaded bungs—also known as top hat bungs—are ideal for welding into gas tanks, oil tanks, or any steel fluid container. Precision-machined from 1018 cold rolled mild... -
Stainless Stepped Blind Tank Bungs
SBTB-SS$4.95Stainless Steel Stepped Blind Tank Bungs – Top Hat Style for Fluid Containers These stainless steel stepped blind bungs—also known as top hat bungs—are perfect for fabricating or modifying gas tanks, oil tanks, or any stainless fluid... -
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 specified NPT thread size. Designed for custom... -
Stepped / Flanged Threaded Through Bungs
STB$4.25Flanged / Stepped Threaded Thru Bungs – Mild Steel These flanged weld-on bungs, also known as top-hat or stepped bungs, are precision-machined from solid round 1018 mild steel stock and threaded through to your specified SAE thread. Designed with a... -
Aluminum Stepped Blind Tank Bungs
ASBTB$4.506061 Aluminum Blind Threaded Stepped Bung – For Fuel, Oil & Catch Tanks These weld-in aluminum blind threaded bungs—also known as top hat bungs—are ideal for custom fabrication of aluminum gas tanks, oil tanks, coolant catch tanks,...
Stepped & Flanged Weld-On Bungs – Precision Fit, USA-Made Fabrication Parts
Bung King's stepped and flanged bungs are premium weld-on components designed for fabricators who need precise alignment, clean surface seating, and added structural integrity. Made from high-quality steel or stainless steel, each bung is CNC-machined in-house in the USA for exact fitment and weld-ready performance.
These stepped bungs feature a shoulder or flange that allows for controlled depth and flush mounting—ideal for fuel tanks, oil tanks, and pressurized systems where a sealed and level connection is critical. With multiple thread types and sizes available, these bungs are trusted by custom motorcycle, automotive, and industrial builders across the country.
Key Features:
Stepped and flanged for precise positioning and sealing
Available in steel and stainless steel
Thread sizes include NPT, fine thread, and custom options
Ideal for tanks, tubing, and pressure-safe connections
CNC-machined in the USA for consistency and accuracy
Weld-ready and corrosion-resistant options available
Whether you're building a high-performance tank or need a flush-mount threaded connection, Bung King’s stepped and flanged bungs deliver durability and professional results every time.
