Mutual Screw & Supply

1/4-20 X 4" Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | Alloy Steel Thermal Black Oxide (100 / Pkg.)

1/4-20 X 4" Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | - Main image
$124.84 $186.33 In stock

These 1/4-20 x 4" socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 1/4-20
  • Length: 4"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Flat Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 1/4-20
  • Length: 4"
  • Threads per inch: 20
  • 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 (5.0 / 5 · 5 reviews)

Eva G. ★★★★★

The black oxide finish on these screws makes them look really professional on my custom machinery jig. They threaded smoothly into tapped holes without any binding, which I appreciate.

Lucy X. ★★★★★

Needed a set of long fasteners for a jig build, and the hex socket drive made tightening in tight spots much easier than a standard hex head. The black oxide finish feels durable, and all 100 screws had clean, consistent threads out of the box.

Charlotte A. ★★★★★

Finally a long 1/4-20 bolt that doesn't strip the hex drive under torque. The black oxide finish on these feels durable and they threaded smoothly into my jig setup.