Mutual Screw & Supply

5/16 External Tooth Lock Washers | 410 Stainless Steel (150 / Pkg.)

5/16 External Tooth Lock Washers | 410 Stainless Steel (150 / Pkg.) - Main image
$7.4 $10 In stock

These #5 lock washers are manufactured from 410 Stainless Steel. They are well suited to preventing fastener loosening under vibration.

  • Material and finish: 410 Stainless Steel
  • Thread size: #5
  • Applications: Preventing fastener loosening under vibration

Specifications

  • Product type: Lock Washers
  • Material: 410 Stainless Steel
  • Finish: Plain
  • Grade: 410
  • Thread size: #5
  • Measurement type: Imperial
  • Pack quantity: 50 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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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 (4.8 / 5 · 5 reviews)

Natalie ★★★★★

The teeth bit into the bolt head immediately when I torqued it down—no spinning or sliding at all. The 410 stainless feels solid and held up fine under the constant vibration on my workshop gear.

Evelyn ★★★★★

Vibration on my milling machine kept loosening the same fastener every shift, so I swapped in these 410 stainless washers and it’s held rock solid for two weeks now. The external teeth really bite into the surface, and the pack of 150 gives me plenty of spares for other jobs.

William B. ★★★★★

The 410 stainless steel feels plenty sturdy for my vibration-heavy setup, and each washer in the pack has clean, consistent teeth that bite into the fastener well. I went through maybe twenty so far on a small engine mount and none have deformed or slipped, which is exactly what I needed for the pri