• ALL18660.jpg
    • Allstar Performance Aluminum Countersunk Washer — No. 10 Hole x 1in OD, Natural, 10-Pack | ALL18660
    • Allstar Performance Aluminum Countersunk Washer — No. 10 Hole x 1in OD, Natural, 10-Pack | ALL18660
    • Allstar Performance Aluminum Countersunk Washer — No. 10 Hole x 1in OD, Natural, 10-Pack | ALL18660
    • Allstar Performance Aluminum Countersunk Washer — No. 10 Hole x 1in OD, Natural, 10-Pack | ALL18660
    • ALL18660.jpg

    Allstar Performance Aluminum Countersunk Washer — No. 10 Hole x 1in OD, Natural, 10-Pack | ALL18660

    Vendor: Allstar Performance
    Part Number: ALL18660
    $9.69

    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.
    Payment & Security

    Secure, encrypted checkout. Card details go straight to the payment processor and are never stored by us.

    • Amazon
    • Amazon
    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • PayPal
    • Shop Pay
    • Venmo
    • Visa
    Share to:
    View Full Details
    Product DetailsFAQReviewsRelated Products

    This Allstar Performance countersunk washer is machined from aluminum with a countersunk profile that seats flush with countersunk screw and bolt heads. It measures a Number 10 hole by 1 in outside diameter and 0.188 in thick, finished in natural aluminum. This washer is sold as a set of 10, part number ALL18660.

    Spec Sheet: Allstar Spec Sheet

    Compatibility

    This is a universal hardware washer, not vehicle-specific, suited to any application using a Number 10 fastener within the 1 in OD dimension listed above. It is also available in a black anodized finish (part number ALL18661) for finish matching, and in a 50-pack size (part number ALL18660-50) for larger-quantity needs.

    FAQ

    What size is this Allstar Performance countersunk washer?

    This countersunk washer is sized for a Number 10 hole with a 1 in OD and 0.188 in thickness, sold as a set of 10 under part number ALL18660.

    What material and finish is this washer made from?

    This washer is machined from aluminum and finished in natural (unanodized) aluminum.

    Is this washer sold individually or as a set?

    This washer is sold as a set of 10 pieces under part number ALL18660.

    Does this washer fit a specific vehicle?

    No, this is a universal countersunk washer suited to any application using a Number 10 fastener within the listed 1 in OD dimension; it is not vehicle-specific.

    Is a different finish or pack size available?

    Yes. This natural finish, 10-pack washer is also available in a black anodized finish (part number ALL18661) and in a 50-pack size (part number ALL18660-50).

    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.

    Related Products

    Recently Viewed