Mutual Screw & Supply

5/16 High-Collar Lock Washers | 18-8 Stainless Steel (1000 / Pkg.)

5/16 High-Collar Lock Washers | 18-8 Stainless Steel (1000 / Pkg.) - Main image
$81.07 $126.67 In stock

These #5 lock washers are manufactured from 18-8 Stainless Steel. They are well suited to preventing fastener loosening under vibration.

  • Material and finish: 18-8 Stainless Steel
  • Thread size: #5
  • Applications: Preventing fastener loosening under vibration

Specifications

  • Product type: Lock Washers
  • Material: 18-8 Stainless Steel
  • Finish: Plain
  • Grade: 18/8
  • Thread size: #5
  • Measurement type: Imperial
  • 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.

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

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

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

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

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

View policy

Customer Reviews (4.6 / 5 · 5 reviews)

James ★★★★★

Used a handful of these on a metal shelving rack that sees constant vibration, and they haven't budged at all. The 18-8 stainless steel feels solid and corrosion-resistant, exactly what I needed for outdoor use.

Chloe ★★★★★

For a small part these washers feel surprisingly solid, the 18-8 stainless finish is clean and consistent across all 1000. I’ve been using them on a vibration-prone motor mount and they’ve held tight without any loosening.

Steven ★★★★★

I bought a full box for my trailer build, and these #5 lock washers tightened down perfectly without galling. The 18-8 stainless finish handles the rain and mud like a champ—no rust after a month.