Products for bench top machinists | LittleMachineShop.com

Key, 4x12 mm

Key, 4x12 mm - Main image
$1.38 $1.95 In stock

Key, 4x12 mm is a small machine key offered by LittleMachineShop.com under the Sieg Industrial Group brand. It is listed with SKU code 2111 in the Standard option. This item is intended for bench top machinist use where a 4 by 12 mm key is required.

  • Product name: Key, 4x12 mm
  • Brand: Sieg Industrial Group
  • SKU: 2111
  • Option: Standard
  • Sold by LittleMachineShop.com, a store for bench top machinists
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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 (5.0 / 5 · 5 reviews)

Sebastian H. ★★★★★

Was hunting for this exact 4x12 mm size to fit my mini mill’s gear shaft, and it dropped right in with zero slop. Machining on the edges is clean, so it seated flush without any filing.

Ava W. ★★★★★

This tiny key is far sturdier than its size suggests—it took some effort to turn in the chuck, which gave me confidence it won't strip easily. Perfect for my micro-milling jobs on the benchtop.

Julian J. ★★★★★

The 4x12 mm dimensions fit perfectly into the slot on my benchtop machine, holding the gear firmly in place. Feels sturdy and well-machined for such a small part. Exactly what I needed.