Mutual Screw & Supply

HOLO-KROME 720001790 3/8-16 X 3-3/4" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (50 / Pkg.)

HOLO-KROME 720001790 3/8-16 X 3-3/4" Socket Cap Screws | Hex Socket Drive | - Main image
$56.46 $80.65 In stock

These 3/8-16 x 3-3/4" 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: 3/8-16
  • Length: 3-3/4"
  • 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: 3/8-16
  • Length: 3-3/4"
  • Threads per inch: 16
  • Measurement type: Inch
  • Pack quantity: 50 per package
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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)

Christopher ★★★★★

These are holding a heavy steel jig plate perfectly, and the black oxide finish looks great against the bare metal. The hex socket drive made installation straightforward even in a tight spot.

Stella ★★★★★

Needed some long fasteners for a custom tooling fixture and these 3/8-16 x 3-3/4" socket cap screws fit perfectly. The black oxide finish looks clean and seems durable enough for shop use.

Amelia M. ★★★★★

Got these for a jig I’m building and the thermal black oxide finish is exactly what I wanted—no glare, and they thread in smooth without any binding. The alloy steel feels solid, and the 3-3/4” length is perfect for the stacked plates I’m clamping.