Mutual Screw & Supply

M4 Medium Split Lock Washers | 18-8 Stainless Steel (150 / Pkg.)

M4 Medium Split Lock Washers | 18-8 Stainless Steel (150 / Pkg.) - Main image
$6.3 $10 In stock

These M4 split 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: M4
  • Applications: Preventing fastener loosening under vibration

Specifications

  • Product type: Split Lock Washers
  • Material: 18-8 Stainless Steel
  • Finish: Plain
  • Grade: 18/8
  • Thread size: M4
  • Measurement type: Metric
  • 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 (4.6 / 5 · 5 reviews)

Emily I. ★★★★★

Installed these on my 3D printer’s vibration-prone axis assembly, and the 18-8 stainless steel finish feels solid and corrosion-proof. They snugged onto the M4 threads perfectly without any jamming. So far, no loosening after hours of printing.

Robert ★★★★★

Had some bolts loosening up on my motorcycle after a bumpy ride, so I swapped in these stainless washers — they grab tight and haven't budged since. The 18-8 material feels solid and doesn't show any rust after a few weeks in damp weather.

Isabella ★★★★★

Used these on a small robotics project that shakes constantly, and not a single fastener has backed out since. The 18-8 stainless finish is clean and uniform across all 150 pieces, and the split design grips exactly as it should.