Seat Bungs

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  • Pair of tapered steel seat pan bungs cut at 20-degree angle, tapped for 3/8"-16 or 5/16"-18 thread, used for sprung motorcycle seat springs. Angled seat spring mounting bungs for motorcycle seat pans, made from 1-inch cold rolled steel with 20-degree taper, threaded for easy spring installation.

    Tapered / Angled Seat Bung

    TSB
    $15.50
    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...
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  • Spring seat front pivot kit with stainless shoulder bolts, bronze Oilite bushings, weld-on tabs, and 1.125" x 0.75" steel bung. Complete weld-on front pivot assembly for sprung motorcycle seat, includes CNC-cut tabs, shims, bushings, and stainless hardware.

    Sprung Seat Front Pivot

    SSFP
    $27.00
    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...
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  • SEAT SPRING PERCH MOUNT WELD ON TO 1" OR 1-1/4" DIA TUBE TO FRAME CHASSIS MOUNT SEAT SPRING PERCH MOUNT WELD ON TO 1" OR 1-1/4" DIA TUBE TO FRAME CHASSIS MOUNT

    Seat Spring Perch / Mount

    SSP
    $22.00
    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...
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  • Weld-on seat pan bung made from 1-inch cold rolled steel, tapped for 3/8"-16 or 5/16"-18 thread, used for custom motorcycle seat mounts. Low-profile seat pan bung for welding to thin metal seat pans, 1" diameter x .400" tall with threaded hole for mounting springs or pivots.

    Seat Pan Bungs

    SPTB
    $4.25
    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...
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Seat Bungs – Weld-On Mounting Solutions for Custom Motorcycle Seats


Bung King’s seat bungs are CNC-machined in the USA from high-quality steel and stainless steel, designed specifically for mounting custom solo seats, chopper seats, or bobber-style seat pans to your motorcycle rigid frame. These weld-on bungs create a solid and secure threaded mounting point, ideal for builders seeking reliable and clean seat installations.

 

Available in a variety of sizes and thread options, these bungs are perfect for fabricators working on Harley-Davidson Sportster, Dyna, Softail, and custom hardtail or rigid frame builds. Whether you’re mounting a spring seat or a rigid pan, Bung King seat bungs offer a simple, durable solution for precision seat placement.

 

Key Features:

Designed for seat pan and bracket mounting
CNC-machined in the USA from steel or stainless steel
Available in multiple sizes and thread options
Ideal for custom motorcycle builds, including Sportster, Dyna, Softail, and more
Weld-ready construction for secure, clean installations
Trusted by professional builders and custom fabricators


When you're building a seat setup that needs to stay firmly in place, Bung King’s seat bungs are the professional's choice for strength and fitment.