Products for bench top machinists | LittleMachineShop.com

Washer, M4 Lock

Washer, M4 Lock - Main image
$0.62 $0.95 In stock

This M4 lock washer is a practical fastener component for bench top machining setups. It is commonly used with the 5100, 5200, 7350, 7450, 3536, 3540, 3595, 7500, 7550, 6450, 7600, 7650, and 7-24 series machines from LittleMachineShop.com.

  • M4 size lock washer for secure fastening
  • Suitable for various LittleMachineShop.com models
  • Helps prevent loosening under vibration
  • Brand: McMaster-Carr
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Express Shipping · United States: $3.99

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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 (5.0 / 5 · 5 reviews)

Penelope A. ★★★★★

Finally got these for my 7-24 series setup and they fit perfectly without any wobble. The chamfered edge makes them sit tight even with repeated tightening.

Emily I. ★★★★★

Every single one seated flush against the bench surface on my 7350, no wobble or shifting during the cut. I've gone through a whole pack on various setups and they hold their shape better than the cheap ones from the hardware store.

William G. ★★★★★

These fit perfectly on my 5100 series jig, which saved me a trip to the hardware store. The split design grips tight without slipping during use, exactly what I needed for a secure hold.