Bungs

Weld-On Counterbored Steel Bungs – For 7/16" Socket Head Cap Screws Get a clean, flush-mounted finish with our precision-machined weld-on counterbored bungs – designed specifically to accept socket head cap screws (Allen bolts). Each bung is...

Coped Threaded Bungs – Weld-On Steel Bungs for Tubing & Fabrication Our Coped Threaded Bungs are precision-made for strength, durability, and a clean fit in custom fabrication projects. Each bung is fish-mouthed (coped) on one end to perfectly...

7/16"-14 Weld-In Threaded Bungs – 1018 Mild Steel These 7/16"-14 weld-in threaded bungs are machined from durable 1018 cold rolled mild steel round bar with a 7/8" outer diameter, offering a strong weld footprint for high-stress fabrication work...

Stainless 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 National Pipe Thread (NPT) specifications for a clean, reliable fit...

Coped Threaded Bungs – 3/8"-16 Thread, 1" OD, 1018 Mild Steel Our Coped Threaded Bungs are designed for strength, precision, and versatility in fabrication projects. Each bung features one coped (fish-mouthed) end, allowing it to fit seamlessly...

Upgrade your custom motorcycle handlebars with our Weld-On Coped Riser Spuds, designed to replace standard bolt-on riser clamps for a stronger, cleaner setup. These precision-machined bungs are made from 1018 mild steel and feature a coped section that...

22mm Petcock Weld-In Bungs – 1018 Mild Steel (Short & Long Options) These 22mm weld-in petcock bungs are machined from solid 1018 cold rolled mild steel and tapped to accept standard 22mm x 1.0 thread motorcycle petcocks—perfect for...

Stepped 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...

These are steel weld in bungs that are tapped at one end blind (not all the way through).  These  are commonly welded into fluid containers to provide a threaded mount. They are available in three different thread sizes.  Metric Sizes also...

2" Threaded Bullet Bung – Blind Tapped, Cold Rolled Steel These weld-on threaded bullet bungs are precision machined from solid 1018 cold rolled mild steel and designed for builders who demand both strength and clean aesthetics. Each bung features...

Stainless Steel Threaded Bullet Bungs – Blind Weld-On, 304 Stainless These premium weld-on threaded bullet bungs are machined from solid 304 stainless steel for superior corrosion resistance and clean aesthetics. Each bung features a blind-tapped...

Our 1/4" BSPP Weld-On Bung is designed for custom motorcycle and fabrication projects requiring British Standard Pipe Thread Parallel fittings. This bung is commonly used on earlier British gas tanks and petcocks, offering a secure and reliable mounting...

Tapered / Angled Seat Pan Bungs – For Sprung Motorcycle Seats When a flat bung won’t cut it, our tapered seat pan bungs are the perfect solution for mounting springs on sprung motorcycle seats. Designed with a 20-degree angled cut, these...

These bungs are for adapting your custom exhaust system to work with your fuel injections factory O2 sensors: Made of 1018 mild steel Tapped to fit 18mm x 1.5 or the later 12mm O2 sensors used by Harley and other OEM applications 1" O.D. for 18mm 3/4 od...

Upgrade your fabrication projects with our Stainless Steel Weld-On Counterbored Bungs, precision-machined for strength, durability, and a professional finish. Each bung is crafted from solid stainless steel and designed to accept 1/4" socket head cap...

Oil Tank Filler Cap & Bung Kit with (3) 1/8" NPT Bungs – Complete Weld-In Kit Build your custom oil tank the right way with this all-in-one weld-in bung kit. Designed for both performance and clean looks, this kit provides every threaded...

Coped Threaded Bungs – 3/8"-16 Thread, 1" OD, 1018 Mild Steel Our Coped Threaded Bungs are designed for strength, precision, and versatility in fabrication projects. Each bung features one coped (fish-mouthed) end, allowing it to fit seamlessly...

These weld bungs are made of solid round stock and drilled and threaded to your specified SAE thread. Bungs come in a few different lengths and diameter options depending on thread size. The shorter of the two sizes is tapped through and the longer ones...

Spring Seat Front Pivot Kit – Weld-On with Stainless Shoulder Bolts & Oilite Bushings Upgrade your motorcycle's sprung seat setup with our Spring Seat Front Pivot Kit – engineered for smooth, stable performance and long-lasting durability...

These weld in Stainless steel bungs are commonly welded into fluid containers to provide a threaded mount.  Offered in three different thread pitches.   Thread Size Outer Diameter Overall Length 1/4" x 20 5/8" 1.25" 5/16" x 18 3/4" 1.25"...

These weld bungs are made of solid round stock and drilled and threaded to your specified SAE thread. Bungs come in a few different lengths and diameter options depending on thread size. The shorter of the two sizes is tapped through and the longer ones...

By popular demand we are now making a Brass Vented version of our common Filler Cap and Bung Can be used for gas tanks oil tanks or any other fluid container. These caps use the same standard bung we have used for years so if you want to upgrade to a...

Seat Spring Perches / Mounts – Weld-On Chassis Brackets Upgrade your custom motorcycle or classic bike build with our Seat Spring Perches, designed to securely mount and locate the lower section of your sprung solo seat. These perches are welded...

Weld-On Pointed Bullet Bung – 1.5" x 3/4", 1018 Steel | Blind Threaded These pointed weld-on bullet bungs offer a sleek, aggressive profile that closely resembles an actual bullet—perfect for builds where form is just as important as...

Counterbored Weld-In Bung Assortment Kit 16pcs– Save 5% on Fabrication Essentials Get everything you need for clean, professional fabrication work with our Counterbored Weld-In Bung Assortment Kit. Each bung is CNC-machined from high-quality mild...

Seat Pan Bungs – 1" OD Weld-On Mounting Bungs for Custom Seat Pans Building your own custom steel seat pan? Our Seat Pan Bungs are the ideal solution for mounting seat springs, front pivots, and other hardware to thin or lightweight seat pans...

These weld bungs are made of solid round stock and drilled and threaded to your specified Metric thread. Bungs come in a few different lengths and diameter options depending on thread size. Great for all your fabrication mounting needs. Not sure what...

20mm Petcock Weld-In Bung – 1018 Mild Steel (Triumph, BMW, Euro Style) This 20mm petcock bung is precision-machined from solid 1018 cold rolled mild steel and features a 20mm x 1.0 male thread, making it an ideal fit for Triumph, BMW and other...

Brass Vented Filler Cap & Bung Kit – 1.25"-12 Thread Back by popular demand, we’re now offering a vented filler cap and bung kit featuring a solid brass cap. Built on the same trusted platform as our original design, this version combines...

Counterbored Weld-In Bung Assortment Kit 40pcs– Save 10% on Fabrication Essentials Get everything you need for clean, professional fabrication work with our Counterbored Weld-In Bung Assortment Kit. Each bung is CNC-machined from high-quality mild...

These threaded bullet bungs are made of solid cold rolled steel and drilled and tapped to you thread choice. These are blind bungs (hole does not go all the way through) and are rounded with a full radius at opposite end. A few different lengths are...

Triumph Oil Feed Bung – Mild Steel or Aluminum Weld-In Bung Our Triumph Oil Feed Bung is designed specifically for classic Triumph motorcycle builders looking for a clean, factory-style solution. Each bung is precision-machined and tapped to accept...

These weld bungs are made of 1018 cold rolled mild steel round stock, drilled and threaded to your specified metric thread. Bungs come in a few different lengths and diameter options depending on thread size.  Great for all your fabrication mounting...

Threaded Bullet Bung Assortment Kit 30pcs – Cold Rolled Steel, Blind Tapped This bullet-style weld-on bung assortment kit is perfect for builders and fabricators who need multiple sizes on hand for various projects. Made from solid 1018 cold rolled...