Mutual Screw & Supply

#4-40 X 5/16" Socket Cap Screws | Hex Socket Drive | Alloy Steel (800 / Pkg.)

#4-40 X 5/16" Socket Cap Screws | Hex Socket Drive | Alloy Steel (800 / Pkg.) - Main image
$12.68 $18.12 In stock

These #4-40 x 5/16" socket cap screws are manufactured from Alloy Steel, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel
  • Drive: Hex Socket
  • Thread size: #4-40
  • Length: 5/16"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Plain
  • Drive type: Hex Socket
  • Thread size: #4-40
  • Length: 5/16"
  • Threads per inch: 40
  • Measurement type: Imperial
  • Pack quantity: 200 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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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 (4.4 / 5 · 5 reviews)

Lucy C. ★★★★★

I needed tiny fasteners for a jig I’m building, and these #4-40 screws fit perfectly without stripping. The 800-count package is great value for precision work, and the alloy steel feels solid.

Ava M. ★★★★★

The hex socket drive grips the allen key perfectly with zero stripping, and the alloy steel feels seriously tough for the price. I've already used half the bag on precision assemblies and every single one threaded clean without a single dud in the lot.

Riley R. ★★★★★

Ordered these for a small jig I was building and the hex socket drive made installation a breeze, even in tight spots. The alloy steel feels plenty sturdy for the precision assemblies I use them in, and 800 in a pack means I won't run out anytime soon.