• Trusted by Racers

    Professional-grade parts used trackside.

  • Real Support, Real People

    Expert help during business hours.

  • Secure Shopping

    Encrypted checkout & trusted payments.

  • Fast U.S. Shipping

    Orders ship quickly from regional warehouses.

MAIN ST COLLECTIVE 100Pcs Zinc Finish Flat Washers - 5/16" USS, 3/8" Inside, & 7/8" Outside Diameter, Automotive & Mechanical Fasteners, Washer Assortment for Screws and Car Accessories

AUT1320PK
In stock
$6.31
100Pcs Zinc Finish Flat Washers offer superior quality and durability for all your fastening projects. Each...
$6.31

MAIN ST COLLECTIVE 100Pcs Zinc Finish Flat Washers - 5/16" USS, 3/8" Inside, & 7/8" Outside Diameter, Automotive & Mechanical Fasteners, Washer Assortment for Screws and Car Accessories

100Pcs Zinc Finish Flat Washers offer superior quality and durability for all your fastening projects. Each washer features a 5/16" USS size, 3/8" inside diameter, and 7/8" outside diameter, ensuring a secure fit for screws, bolts, and other mechanical fasteners. The zinc-plated finish provides excellent corrosion resistance, making them perfect for automotive washers, fender washers, machine washers, hardware washers, and other DIY or professional repair applications.
This 100-piece washer kit is ideal for garages, workshops, and home use, offering an organized solution for automotive fasteners, car fasteners, bolt washers, and screw washers. Suitable for auto parts, auto accessories, mechanical fasteners, and general hardware projects, these versatile flat washers deliver reliable performance, long-lasting durability, and convenience for a wide range of fastening needs.

Features:

  • Zinc-plated for corrosion resistance
  • 5/16" USS size
  • 3/8" inside diameter
  • 7/8" outside diameter
  • Perfect for automotive fasteners
  • Fender washer for vehicles
  • Machine and hardware tasks
  • DIY washer assortment
  • Durable flat washers for long term
  • 100-piece home or garage kit
Read More
Read Less

Shipping

Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.

Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.

Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.

Returns

Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.

Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.

Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.

Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).

Your cart

×