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
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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
    $37.00
    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...
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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...
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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...
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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.

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