Mutual Screw & Supply

5/16-18 X 2-1/2" Socket Cap Screws | Hex Socket Drive | Nylon Patch | Partially Threaded | Alloy Steel Thermal Black Oxide (100 / Pkg.)

5/16-18 X 2-1/2" Socket Cap Screws | Hex Socket Drive | Nylon Patch | Partially - Main image
$63.48 $104.07 In stock

These 5/16-18 x 2-1/2" 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
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 5/16-18
  • Length: 2-1/2"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 5/16-18
  • Length: 2-1/2"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 100 per package
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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)

Ellie ★★★★★

The nylon patch on these screws saved me time during assembly—no more worrying about them backing out under vibration. They're sturdy and the black oxide finish looks clean on my jig setup.

George ★★★★★

Worked perfectly for mounting a jig plate on my milling table—the nylon patch held tight even under heavy vibration. The black oxide finish feels durable and hasn't shown any signs of rust after a few weeks in the shop.

Benjamin B. ★★★★★

Putting together some tooling fixturing and these cap screws fit perfectly. The nylon patch holds them snug even under vibration, which my previous plain bolts never did. Good buy for the price.