Products for bench top machinists | LittleMachineShop.com

Cap Screw, M4x40, Socket Head

Cap Screw, M4x40, Socket Head - Main image
$0.62 $0.85 In stock

Cap Screw, M4x40, Socket Head is a socket head cap screw with an M4 thread size and 40 mm length. It is listed under fasteners and cap screws, and is branded McMaster-Carr.

  • Product: Cap Screw, M4x40, Socket Head
  • Thread size: M4
  • Length: 40 mm
  • Drive type: Socket head
  • Brand: McMaster-Carr
  • SKU: 4470 (Standard)
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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)

Charlotte H. ★★★★★

The 40 mm length gave me just enough reach for the bracket I was mounting, and the hex socket drive seated perfectly on my Allen key without any wobble. Threads were clean and consistent from the first turn.

George ★★★★★

The M4 threading cut smoothly into the pre-tapped hole with zero resistance. I used three of these to secure a mounting bracket, and the socket head gave my allen wrench a perfect, non-slip grip. Solid holding power for a small fastener.

Andrew ★★★★★

The 40mm length was exactly what I needed to secure a bracket through a thick spacer, and the M4 threads threaded smoothly into the pre-tapped hole without any binding. Feels solid and well-machined, no burs or rough edges.