Mutual Screw & Supply

#4 x 5/16" OD Flat Washers | .078" Thick | 18/8 Stainless Steel (1000 / Pkg.)

#4 x 5/16" OD Flat Washers | .078" Thick | 18/8 Stainless Steel (1000 / Pkg.) - Main image
$55.25 $85 In stock

These flat washers are manufactured from 18/8 Stainless Steel, featuring a flat head. They are well suited to distributing load and protecting surfaces under fasteners.

  • Material and finish: 18/8 Stainless Steel
  • Head style: Flat
  • Applications: Distributing load and protecting surfaces under fasteners

Specifications

  • Product type: Flat Washers
  • Material: 18/8 Stainless Steel
  • Finish: Plain
  • Grade: 18/8
  • Head style: Flat
  • Measurement type: Imperial
  • Dimensions: .125" ID x .3125" OD x .078" Thick
  • Pack quantity: 1000 per package

Please note: This item is excess stock and is sold non-cancelable, non-refundable, and non-returnable. Please call us with any questions about this item before ordering.

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When it ships

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.2 / 5 · 5 reviews)

Aurora H. ★★★★★

These came in a neatly packed box, and the 18/8 stainless finish looks clean and uniform across all 1000 pieces. I’ve used them to back up some softer wood fasteners and haven’t seen any rust or corrosion after a few weeks.

Amelia T. ★★★★★

The .078" thickness feels solid and the 18/8 stainless finish resists rust well—used dozens already for a trailer build and they sit perfectly flat. No burrs or uneven edges out of the bag.

Ava T. ★★★★☆

The 18/8 stainless steel construction feels solid and corrosion-resistant, which is exactly what I needed for outdoor projects. A few washers had slight burrs on the edges, but nothing that affects their function. Overall, a good value for the quantity.