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.-Leather Cushion Washers with 3/8 inch Hole 10 pack
Regular price
$13.95
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.
Premium Weld-On Rear Fender Mounts for Custom Motorcycles
TC Bros weld-on rear fender mounts provide secure, professional mounting solutions for rear fenders on custom motorcycle builds. These precision-manufactured steel mounts are designed to be welded onto your frame, offering three distinct styles to match your build requirements and aesthetic preferences.
Available Styles:
Single Hole - Minimalist design with single mounting hole for clean, simple installations
Standard - Classic dual-hole design for secure, traditional fender mounting
Ribbed - Enhanced design with ribbed reinforcement for maximum strength and distinctive styling
Key Features:
Durable Steel Construction - Built to withstand the rigors of motorcycle use
Precision Manufactured - Consistent quality and reliable fitment
Weld-On Design - Permanent, secure mounting to your frame
Multiple Styles - Choose the design that matches your build aesthetic
Professional Quality - Trusted by custom builders and fabricators
Versatile Applications - Compatible with various fender types and custom builds
Choosing the Right Style:
Single Hole: The minimalist single hole design is perfect for builders who want a clean, simple look with minimal hardware visible. Ideal for lightweight fenders and builds where simplicity is key. The single mounting point provides adequate support for most rear fender applications while maintaining a sleek profile.
Standard: The classic dual-hole design offers traditional styling with proven reliability. Two mounting holes provide secure attachment points for your fender struts or mounting hardware. This is the most versatile option, working well with virtually any custom build style from choppers to bobbers to cafe racers.
Ribbed: The ribbed design adds structural reinforcement through integrated ribs, providing maximum strength for heavy-duty applications. The ribbed pattern also adds a distinctive visual element that complements builds with other ribbed or finned components. Perfect for larger fenders, touring customs, or builds where extra strength is desired.
Specifications:
Material: Steel
Mounting Type: Weld-On
Styles: Single Hole, Standard (Dual Hole), Ribbed
Finish: Raw steel (ready for paint or powder coating)
Perfect For:
Custom motorcycle frame building
Chopper and bobber builds
Cafe racer and tracker conversions
Rear fender installations
Frame modifications and upgrades
Professional fabrication shops
DIY custom builders
Installation Notes:
These fender mounts are designed to be welded onto your motorcycle frame at the desired mounting location. Proper positioning and alignment are critical for correct fender fitment and appearance. We recommend:
Test-fit your fender and mounts before welding
Ensure proper clearance for tire, suspension travel, and chain/belt
Use appropriate welding techniques for your frame material
Clean and prep mounting area before welding
Paint or powder coat after installation to prevent rust
Professional installation is recommended if you're not experienced with welding and frame fabrication. Each TC Bros fender mount is manufactured to exacting standards for reliable performance on your custom motorcycle build.
TC Bros Threaded Steel Bungs - Standard (5/16-18 & 3/8-16)
Regular price
$27.95
Premium TC Bros Threaded Steel Bungs - Standard Style
TC Bros standard threaded steel bungs are essential fabrication components for custom motorcycle builds. These precision-manufactured bungs provide secure, threaded mounting points for gas tanks, seat pans, fenders, battery boxes, and countless other components. Available in two thread sizes and three lengths to accommodate various mounting applications.
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 and lighter components
5/16-18 Thread / 1" Long - Standard length for most 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 in compact spaces
3/8-16 Thread / 1" Long - Most popular size for general fabrication
3/8-16 Thread / 1.5" Long - Maximum strength for heavy-duty applications
Key Features:
Precision Threading - Clean, accurate threads for reliable fastener engagement
Standard Design - Flat base for welding to flat surfaces and tubing
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
Versatile Applications - Suitable for countless mounting scenarios
Common Applications:
Gas tank mounting
Seat pan mounting
Fender mounting
Battery box mounting
Tool box mounting
Sissy bar mounting
Luggage rack mounting
Accessory mounting points
Custom fabrication projects
Other Fabrication Hardware Options:
Depending on your specific application, you might need a different style of bung or mounting solution:
Alternative Bung Styles:
Coped Steel Bungs - Feature a curved notch that fits flush on round tubing for a professional, finished appearance. Perfect when welding to frame tubes or round bars.
Counterbore Steel Bungs - Designed specifically for socket head bolts with a recessed counterbore that allows the bolt head to sit flush. Ideal for clean, low-profile installations.
Radius Style Steel Bungs - Feature a radiused base for improved weld penetration and strength. Best choice for high-stress applications.
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: Standard (flat base)
Finish: Raw steel (ready for welding and finishing)
Perfect For:
Custom motorcycle frame building
Chopper and bobber builds
Cafe racer and tracker conversions
Vintage motorcycle restorations
Accessory installations
Frame modifications and upgrades
Professional fabrication shops
DIY custom builders
Installation Notes:
These bungs are designed to be welded onto your motorcycle frame, gas tank, fenders, or other components at the desired mounting location. Proper positioning and alignment are critical for correct fitment and function. We recommend:
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 steel bung is precision-manufactured to exacting standards for reliable performance on your custom motorcycle build.
Prism Supply Co Weld-On License Plate Bracket
Regular price
$27.00
Weld-On License Plate Bracket
The good folks over at Prism Supply Co have designed a license plate bracket to work with any new or vintage license plate. It's perfect for that sissy bar application. Comes in either stainless or mild steel with a thickness of 8 gauge or 0.1285".
Everything you need to mount your TC Bros. King & Queen Seat. Weld-on bracket is coped to fit our Sportster hardtail perfectly. Mounts are slotted if you want to use this for a universal/custom use.
