Mutual Screw & Supply

#4-40 X 7/8" Socket Cap Screws | Flat Head Hex Socket Drive | 18/8 Stainless Steel (1800 / Pkg.)

#4-40 X 7/8" Socket Cap Screws | Flat Head Hex Socket Drive | 18/8 Stainless - Main image
$32.46 $47.04 In stock

These #4-40 x 7/8" socket cap screws are manufactured from 18/8 Stainless Steel, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 18/8 Stainless Steel
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread size: #4-40
  • Length: 7/8"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Flat Head
  • Material: 18/8 Stainless Steel
  • Finish: Plain
  • Grade: 18/8
  • Drive type: Hex Socket Drive
  • Thread size: #4-40
  • Length: 7/8"
  • Threads per inch: 40
  • Measurement type: Inch
  • Pack quantity: 1800 per package
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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 (5.0 / 5 · 5 reviews)

Miles R. ★★★★★

The hex socket drive on these #4-40 screws makes installation much easier than standard slotted heads. They're great for precision jigs and feel well-machined right out of the box.

Stella P. ★★★★★

Finally a bulk pack of #4-40 screws that actually includes enough hardware for multiple projects; the stainless steel finish looks clean and resists rust on my jigs.

Charlotte W. ★★★★★

I use these for building tooling fixtures, and the 18/8 stainless steel really holds up without any corrosion. The flat head sits flush perfectly, and having 1800 in one package means I won't need to reorder for a long time.