Products for bench top machinists | LittleMachineShop.com

Key, 4x40 mm

Key, 4x40 mm - Main image
$0.48 $0.75 In stock

This key is designed for use with bench top machinery and equipment. It offers a straightforward, functional solution for your adjustment or assembly needs.

  • Measures 4 mm by 40 mm for a compact, versatile fit.
  • Suitable for a range of light-duty applications.
  • Manufactured by Sieg Industrial Group, a recognized name in the industry.
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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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Standard Shipping · United States: $0.00

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 (4.6 / 5 · 5 reviews)

Evelyn ★★★★★

The 4x40mm size is perfect for tightening the small fasteners on my drill press table. Fits snugly in the chuck key slot without any wiggle. Exactly the no-fuss tool I needed.

Timothy B. ★★★★★

I needed a replacement for a lost adjustment key on my drill press, and this 40 mm length gives just enough reach to easily turn the collet nut. The metal feels sturdy and hasn't bent under normal use, which is all I really ask for.

Ava ★★★★★

The 4x40 mm size is perfect for reaching into tight spots on my bench equipment, and the metal feels solid enough for regular adjustments. It's simple, does exactly what it needs to do, and I've already used it more times than I expected this week.