Mutual Screw & Supply

5/16-18 X 3-1/4" Knurled Cup Point Socket Set Screws | Alloy Steel (50 / Pkg.)

5/16-18 X 3-1/4" Knurled Cup Point Socket Set Screws | Alloy Steel (50 / Pkg.) - Main image
$173.02 $258.24 In stock

5/16-18 x 3 1/4" knurled cup point socket set screws in Alloy Steel, with a hex socket drive for high-torque adjustment in tight spaces.

  • Hex socket drive
  • Knurled Cup Point tip
  • Alloy Steel construction

Specifications

  • Thread Size: 5/16-18
  • Length: 3 1/4"
  • Point: Knurled Cup Point
  • Material: Alloy Steel
  • Package Quantity: 50
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Customer Reviews (4.8 / 5 · 5 reviews)

Robert ★★★★★

The knurled cup point on these screws really bit into the material, preventing any spinning while I tightened them down. For a 3-1/4" fastener, the hex socket drive gave me plenty of control in that tight spot.

Olivia ★★★★★

The hex socket drive made torquing these into a tight bracket a breeze, and the 3-1/4" length gave me just enough bite for a secure hold in steel. A solid upgrade for heavy-duty applications.

Samuel ★★★★★

The knurled cup point really bites into the shaft, so I don't have to worry about these loosening under vibration. I also appreciate the hex socket drive for getting them tight in awkward spots. Exactly what I needed for a repair job.