🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
Premium TC Bros Coped Steel Bungs for Round Tubing
TC Bros coped steel bungs are precision-engineered fabrication components designed specifically for welding to round tubing. These bungs feature a curved notch (cope) that fits flush against round frame tubes, creating a professional, finished appearance with maximum weld surface area. Perfect for custom motorcycle builds where you're mounting components to round tubing.
Available Options:
Thread Sizes: 5/16-18 or 3/8-16 Lengths: 1/2", 1", or 1.5"
5/16-18 Thread / 1/2" Long - Compact size for tight spaces on round tubing
5/16-18 Thread / 1" Long - Standard length for most round tube applications
5/16-18 Thread / 1.5" Long - Extended length for thicker materials or additional thread engagement
3/8-16 Thread / 1/2" Long - Larger thread for heavier components on round tubing
3/8-16 Thread / 1" Long - Most popular size for general round tube fabrication
3/8-16 Thread / 1.5" Long - Maximum strength for heavy-duty round tube applications
Key Features:
Coped Design - Curved notch fits flush on round tubing for professional appearance
Maximum Weld Surface - Curved base provides more contact area for stronger welds
Precision Threading - Clean, accurate threads for reliable fastener engagement
Multiple Sizes - Six configurations to match your specific needs
Quality Steel Construction - Durable materials for long-lasting performance
Professional Quality - Manufactured to TC Bros' exacting standards
Why Choose Coped Bungs:
Coped bungs are the preferred choice when welding to round tubing (frame tubes, handlebars, sissy bars, etc.). The curved notch matches the radius of the tubing, allowing the bung to sit flush against the surface. This creates a cleaner appearance than standard flat-base bungs and provides more weld surface area for a stronger, more reliable connection.
Common Applications:
Mounting to round frame tubes
Sissy bar mounting on round tubing
Handlebar mounting points
Fender strut mounting to round bars
Luggage rack mounting to round tubing
Any application where you're welding to round tubing
Other Fabrication Hardware Options:
Depending on your specific application, you might need a different style of bung or mounting solution:
Alternative Bung Styles:
Standard Threaded Steel Bungs - Traditional flat-base bungs for welding to flat surfaces or when coping isn't required. Best for gas tanks, seat pans, and flat mounting surfaces.
Counterbore Steel Bungs - Designed specifically for socket head bolts with a recessed counterbore for flush, low-profile installations. Ideal for visible mounting points where clean appearance matters.
Radius Style Steel Bungs - Feature a radiused base for improved weld penetration and strength. Best choice for high-stress applications on flat or slightly curved surfaces.
Non-Threaded Mounting Solutions:
Weld-On Steel Mounting Tabs - When you need to mount brackets, fenders, or accessories without threaded fasteners, our mounting tabs provide secure weld-on mounting points in 7 different styles.
Specifications:
Material: Steel
Thread Sizes: 5/16-18 or 3/8-16
Lengths: 1/2", 1", or 1.5"
Style: Coped (curved notch for round tubing)
Finish: Raw steel (ready for welding and finishing)
Perfect For:
Custom motorcycle frame building with round tubing
Chopper and bobber builds
Cafe racer and tracker conversions
Hardtail frame fabrication
Sissy bar installations
Professional fabrication shops
DIY custom builders
Installation Notes:
These coped bungs are designed to be welded onto round tubing at the desired mounting location. The curved notch should fit flush against the tubing for maximum weld surface area. We recommend:
Verify the cope matches your tubing diameter for proper fitment
Test-fit components before welding bungs in place
Ensure proper clearance for fasteners and moving parts
Use appropriate welding techniques for your material
Clean and prep mounting area before welding
Paint or powder coat after installation to prevent rust
Use correct thread size for your application (5/16-18 for lighter components, 3/8-16 for heavier)
Professional installation is recommended if you're not experienced with welding and frame fabrication. Each TC Bros coped steel bung is precision-manufactured to exacting standards for reliable performance and professional appearance on your custom motorcycle build.
TC Bros Universal Frisco Gas Tank Mounting Kit - Stainless Hardware with Tophat Bungs
Regular price
$56.95
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
TC Bros Universal Frisco Gas Tank Mounting Kit
Mount your gas tank with confidence using this complete Frisco-style mounting kit. Everything you need for a professional, secure installation on custom choppers and bobbers.
Complete Kit Includes
3/8-16 stainless steel button head bolts - Corrosion-resistant hardware for long-lasting durability
1018 mild steel tophat bungs - Precision-engineered weld-on mounts for secure tank attachment
Leather cushion washers - Protect your tank finish and dampen vibration
Stainless steel washers - Complete the professional installation
Key Features
Universal Frisco-style design - Classic mounting solution for custom gas tanks
Premium materials - Stainless steel fasteners resist rust and corrosion
Complete hardware package - No need to source individual components
Professional finish - Button head bolts provide a clean, low-profile look
Vibration dampening - Leather washers protect tank paint and reduce metal-to-metal contact
Applications
This mounting kit is ideal for custom motorcycle builders working on choppers, bobbers, and cafe racers. The Frisco-style mounting system is a time-tested solution that provides secure tank attachment while maintaining the clean lines of a custom build.
Installation Note: Tophat bungs require welding to the frame. Ensure proper fitment and alignment before welding.
TC Bros.-Leather Cushion Washers with 3/8 inch Hole 10 pack
Regular price
$13.95
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
Leather Cushion Washers with 3/8 inch Hole 10 pack
These leather washers are perfect for protecting your paint and are more durable than rubber. The cushioning & dampening effect that these washers provide is perfect for installing between your frame and mounting tabs found on gas tanks, fenders, oil tanks, or anything else you want to protect from vibration. Also great for use under solo seat springs to prevent squeaking. Dimensions are 1 inch diameter x 3/8 inch hole x 1/8 inch thick. Sold in pack of 10 washers.
TC Bros - 8" Narrow Mini Apes Handlebars 1"
Regular price
$195.95
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
1" Narrow Mini Apes Handlebars
Our 8" Rise Narrow Mini Ape Handlebars are made from 1 inch OD x 0.109" wall premium steel tubing. They are CNC mandrel bent for ultra-smooth bends and flawless symmetry. Knurled riser clamp locations are 3.5" on centers to fit standard Harley spacing (not springer) and prevent bars from slipping once installed. With 8" of rise and sufficient pullback, these bars are very comfortable and fit stock cables, brake lines, and wiring on most Harley models. They look great on any Harley, but especially good on Narrow glide front ends because, unlike most ape hangers on the market, the bottom of these bars are not wider than the trees.
Available in two configurations:"Smooth" for custom applications or pre-1982 controls, or "Dimple" for 1982-newer Harley controls. Dimpled bars are drilled for internal wiring.
Available in two finishes:Triple chrome plated, or durable satin black powder coat.
Note: please see photos for dimensions and specifications to confirm fitment of your motorcycle.
Does not fit throttle by wire models.
Smooth configuration bars may also be used on many Triumph models or Metric Cruisers with 1" diameter stock handlebars.
TC Bros. Side Mount License Plate Bracket (with no light)
Regular price
$58.95
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
TC Bros. Side Mount License Plate Bracket (with no light)
The unique modular design allows the license plate to be mounted horizontally or vertically on either the left or right side of the bike by bolting it together using the pre cut mounting holes in the bracket. The axle mount hole is .787" diameter so this can be used on Harleys with 3/4" axles and Metric bikes with 20mm axles.
This is the most versatile bracket on the market! Your mounting options and licence plate positions can be mixed and matched to give you the unique look that you are going for.
The bracket is powdercoated gloss black and comes with stainless steel button head bolts/nuts.
Use our LED License Plate Lights/Bolts (TC Bros. #107-0037) to keep your bike legal.
This plate holder is designed for holding a license plate only (not for use with a tail light). For side mounted plate holders with tail lights, please see our other products.
Made in USA.
TC Bros. Chrome Louvered Air Cleaner for HD CV Carbs & EFI
Regular price
$122.95
🚚 Free Canada-wide shipping on orders over $199 (excluding oversized items)
Chrome Louvered Air Cleaner for HD CV Carbs & EFI
Get rid of your bulky "Ham-Can" style air cleaner and show off your V-Twin Engine with this TC Bros. Choppers chrome louvered air cleaner.
Kit features CNC machined, powder-coated steel mounting bracket that is proudly made in the USA. Included mounting hardware fits into recessed holes to provide a proper sealing surface for the included filter element.
Kit includes both a hotrod-inspired Tri-Bar wing bolt and standard round head screw hardware. This ultra-compact kit is designed to fit all Harley Davidson® Big Twin and Sportster models using factory CV Carburetors or factory electronic fuel injection (EFI) units (excluding Throttle by Wire models).
This kit will not fit 1995-2001 HD Big Twin models equipped with Magneti Marelli fuel injection units using dual bore throttle bodies. This kit will also not fit Harley FBW models (a.k.a. Fly By Wire or Throttle by Wire) as commonly found on late model EFI Twincam FLT touring and all Milwaukee 8 engine models (M8 Softail and Touring).
If installing on models using a CV carburetor, it is highly recommended to use it in conjunction with a support bracket for longevity. See TC Bros. SKU #109-0083 for Sportster models. A support bracket is not required on EFI models. Note: EVO Big Twins and 1991-up Sportsters also require crankcase breathers. See TC Bros. SKU #109-0082.
