Mutual Screw & Supply

HOLO-KROME 720000210 #4-40 X 7/16" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 720000210 #4-40 X 7/16" Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$21.42 $31.97 In stock

These #4-40 x 7/16" socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Drive: Socket Drive
  • Thread size: #4-40
  • Length: 7/16"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Socket Drive
  • Thread size: #4-40
  • Length: 7/16"
  • Threads per inch: 40
  • Measurement type: Inch
  • Pack quantity: 100 per package
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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 (4.8 / 5 · 5 reviews)

Miles ★★★★★

Used these to rebuild a small fixture at work and they seated perfectly every single time, no stripped heads or wobble on the hex driver. The thermal black oxide looks consistent across all 100 pieces, which is more than I can say for cheaper packs I've tried. Just the right size for #4-40 clearance

Julian C. ★★★★★

The socket drive on these #4-40 screws seats perfectly on my hex wrench, zero stripping or wobble during assembly. Used them to secure a jig plate and they've held tight through a week of vibration without backing off. The black oxide finish also picked up a nice even patina, which is a bonus for a

Stella C. ★★★★★

The black oxide finish on these screws gives them a nice, consistent look against the steel tools I'm using them with. Snug fit, no wobble at all in the jig I'm building. So far seems like a solid pack for the price.