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    • Allstar Performance Countersunk Bolt Kit 1/4in w/1in Washer Natural 50pk — Allen Head, Aluminum/Steel | ALL18632-50
    • Allstar Performance Countersunk Bolt Kit 1/4in w/1in Washer Natural 50pk — Allen Head, Aluminum/Steel | ALL18632-50
    • Allstar Performance Countersunk Bolt Kit 1/4in w/1in Washer Natural 50pk — Allen Head, Aluminum/Steel | ALL18632-50
    • Allstar Performance Countersunk Bolt Kit 1/4in w/1in Washer Natural 50pk — Allen Head, Aluminum/Steel | ALL18632-50
    • ALL18632-50.jpg

    Allstar Performance Countersunk Bolt Kit 1/4in w/1in Washer Natural 50pk — Allen Head, Aluminum/Steel | ALL18632-50

    Vendor: Allstar Performance
    Part Number: ALL18632-50
    $71.49

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    Product DetailsFAQReviewsRelated Products

    Allstar Performance Countersunk Bolt Kit — 1/4-20in thread bolt, 1in overall length, Allen (hex drive) head, paired with a 1in OD countersunk aluminum washer and nyloc nut in a Natural finish. The countersunk washer lets the fastener sit flush with the surface for a smooth, finished look. This kit includes a set of 50 complete bolt, washer, and nut assemblies.

    Spec Sheet: Allstar Spec Sheet

    Compatibility

    This is a universal fastener kit sized by thread, washer diameter, and finish — not vehicle-specific. Thread: 1/4-20in. Washer OD: 1in. Head style: Allen (hex drive). Finish: Natural. Use to flush-mount racing body panels, roofs, spoilers, and side skirts, or to replace sharp-edged fasteners inside the cockpit.

    FAQ

    What thread size and washer diameter does this countersunk bolt kit use?

    This kit uses a 1/4-20in thread bolt paired with a 1in OD countersunk washer.

    What head style and materials are used?

    Each bolt has an Allen (hex drive) head and is paired with an aluminum countersunk washer and nyloc nut, in a Natural finish.

    How many bolt, washer, and nut sets are included?

    This kit (SKU ALL18632-50) includes 50 complete sets — bolt, countersunk washer, and nyloc nut.

    What is a countersunk bolt kit used for?

    Countersunk bolt kits like this one are used to flush-mount racing body panels, roofs, spoilers, and side skirts, or to replace sharp-edged fasteners with a smooth, finished look inside the cockpit.

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy
    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy
    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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