TC Bros Universal Frisco Gas Tank Mounting Kit - Stainless Hardware with Tophat Bungs

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.

Build Your Dream Custom Seat with Professional-Grade Mounting Hardware

Transform your bobber or chopper build with TC Bros' precision-engineered Weld On Solo Seat Spring Mounts. These CNC-machined mounts deliver the rock-solid foundation your custom seat deserves, combining old-school craftsmanship with modern manufacturing precision.

Why Riders Choose These Mounts

Imagine the satisfaction of a perfectly mounted solo seat that moves with you on every ride—no rattles, no flex, just smooth suspension action from your torsion springs. These aren't stamped sheet metal brackets that'll fail after a season. They're machined from solid 1018 cold rolled steel, built to handle years of hard riding.

Key Features

• CNC Machined Precision: Crafted from 1018 cold rolled steel for superior strength and durability
• Universal Fit Design: 1 1/8" radius cope fits both 1" and 1 1/4" cross tubes seamlessly
• Stainless Hardware: 5/16"-18 stainless steel studs resist corrosion and maintain clamping force
• Torsion Spring Compatible: Engineered specifically for torsion-style seat springs
• Weld-Ready Finish: Clean steel surface ready for your torch—no prep work needed
• Complete Kit: Includes 2 mounts, 2 stainless washers, 2 studs, and 2 nylock nuts

Technical Specifications

• Material: 1018 Cold Rolled Steel
• Stud Thread: 5/16"-18
• Base Diameter: 1"
• Cope Radius: 1 1/8"
• Tube Compatibility: 1" and 1 1/4" cross tubes
• Finish: Raw steel (weld-ready)
• Country of Origin: USA

What's in the Box

• 2 × CNC Machined Steel Mounts
• 2 × Stainless Steel Studs
• 2 × Stainless Steel Washers
• 2 × Nylock Nuts

Note: Seat springs sold separately

Installation Made Simple

The pre-coped radius means these mounts sit flush against your frame tube right out of the box. Position them where you want your seat, tack them in place, check your alignment, then lay down a solid bead. The universal design gives you complete freedom to position your seat exactly where it feels right for your build.

Built by Builders, for Builders

TC Bros understands what custom motorcycle fabricators need because they're fabricators themselves. These mounts represent the same quality and attention to detail you'll find throughout their entire line of chopper and bobber components.

Ready to mount your custom seat the right way? Add these professional-grade spring mounts to your cart and take the next step in your build.

Premium Sissy Bar and Fender Strut Mounting Bungs for Custom Motorcycles

TC Bros high-quality sissy bar and fender strut mounting bungs are essential hardware for custom motorcycle builds. These precision-machined bungs provide secure, reliable mounting points for sissy bars, fender struts, and other rear-mounted accessories on your custom bike.

What Are Sissy Bar/Fender Strut Bungs?

These specialized bungs are designed to be welded onto your motorcycle frame to create mounting points for sissy bars and fender struts. Unlike threaded bungs, these feature an internal diameter (ID) that accepts round tubing, allowing you to slide your sissy bar or strut directly into the bung for a clean, professional installation.

Available Sizes:

• 1/2" ID - Accepts 1/2" diameter tubing
• 5/8" ID - Accepts 5/8" diameter tubing

Key Features:

• Precision Machined - Accurate internal diameter for perfect tube fitment
• Durable Steel Construction - Built to withstand the rigors of motorcycle use
• Clean Installation - Provides a professional, factory-quality appearance
• Versatile Applications - Perfect for sissy bars, fender struts, and custom accessories
• Easy to Weld - Designed for straightforward installation on your frame
• Professional Grade - Trusted by custom builders and fabricators

Choosing the Right Size:

1/2" ID: Choose this size if your sissy bar or fender strut tubing has a 1/2" outer diameter. This is a common size for many aftermarket sissy bars and lighter-duty applications.

5/8" ID: Select this size for 5/8" diameter tubing. This larger size is often used for heavier-duty sissy bars and provides extra strength and stability.

Pro Tip: Always measure your sissy bar or fender strut tubing diameter before ordering to ensure proper fitment. The tubing should slide into the bung with minimal clearance for the best results.

Perfect For:

• Custom motorcycle frame building
• Chopper and bobber builds
• Cafe racer conversions
• Sissy bar installations
• Fender strut mounting
• Rear rack and luggage carrier mounting
• Custom accessory fabrication

Installation Notes:

These bungs are designed to be welded onto your motorcycle frame at the desired mounting location. Proper alignment is critical for sissy bar and fender strut installations. We recommend test-fitting your components before final welding to ensure proper positioning and alignment.

Each bung is manufactured to TC Bros' exacting standards, ensuring consistent quality, precise machining, and reliable performance for your custom motorcycle project.

Universal Bobber/Chopper Fender Strut Kit

Kit includes:

(4) CNC Machined steel bungs with 3/8-16 threaded hole

(2) 12" long 1/2" diameter steel rods.

Everything is made in USA from 1018 mild steel for easy welding.

For some extra style, use the TC Bros Mounting Bung Kit