Mutual Screw & Supply

#4 External Tooth Lock Washers | Steel Trivalent Zinc (100 / Pkg.)

#4 External Tooth Lock Washers | Steel Trivalent Zinc (100 / Pkg.) - Main image
$6.2 $10 In stock

These #4 lock washers are manufactured from Steel with a trivalent zinc finish. They are well suited to preventing fastener loosening under vibration.

  • Material and finish: Steel, Trivalent Zinc finish
  • Thread size: #4
  • Applications: Preventing fastener loosening under vibration

Specifications

  • Product type: Lock Washers
  • Material: Steel
  • Finish: Trivalent Zinc
  • Thread size: #4
  • 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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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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If you need a refund

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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)

Sofia ★★★★★

I’ve been using these #4 lock washers on a small vibration-prone assembly, and they’ve held tight through several test runs without loosening. The trivalent zinc finish seems clean and corrosion-resistant so far. Definitely a solid choice for securing fasteners in a shaky environment.

Christopher ★★★★★

The zinc coating on these #4 washers is consistent and smooth, no rough burrs like some packs I've bought. They held a bolt tight on a trailer hitch after a week of rough gravel roads.

Riley C. ★★★★★

Used a pack of these on a mower deck rebuild and they held fast even after a full season of heavy vibration. The trivalent zinc coating looks uniform and hasn't shown any rust yet. Exactly what I needed for a reliable lock washer.