Mutual Screw & Supply

#4-40 X 3/8" Socket Cap Screws | Flat Head Hex Socket Drive | 18/8 Stainless Steel (800 / Pkg.)

#4-40 X 3/8" Socket Cap Screws | Flat Head Hex Socket Drive | 18/8 Stainless - Main image
$14.45 $19.8 In stock

These #4-40 x 3/8" socket cap screws are manufactured from 18/8 Stainless Steel, featuring a hex socket drive and a flat head. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 18/8 Stainless Steel
  • Drive: Hex Socket
  • Head style: Flat
  • Thread size: #4-40
  • Length: 3/8"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: 18/8 Stainless Steel
  • Finish: Plain
  • Grade: 18/8
  • Head style: Flat
  • Drive type: Hex Socket
  • Thread size: #4-40
  • Length: 3/8"
  • Threads per inch: 40
  • Measurement type: Imperial
  • Pack quantity: 100 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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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)

Kevin T. ★★★★★

The hex socket drive seated perfectly on my Allen wrench, no stripping or wobble even when I torqued them down on a jig fixture. The flat heads sit flush enough for precision assemblies, and the 18/8 stainless is exactly what I needed for outdoor tooling.

Ryan N. ★★★★★

The 18/8 stainless steel finish feels properly machined, no burrs or rough edges on any of the 800 pieces. I’ve already used a handful for a small jig and the flat head sits flush exactly as intended.

Thomas ★★★★★

The hex socket drive got a solid grip on my Allen wrench with no slipping, even when torquing into a tight jig. I've used about forty so far from this pack and not a single stripped thread or burr.