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1/2" (3/8"-16 UNC) x 1-1/4", Socket Head Shoulder Screw, Alloy Steel, Black Oxide

Unbrako Part No. 106400


Item Shoulder Screw
System of Measurement Inch
Shoulder Diameter 1/2
Thread Size 3/8" - 16
Shoulder Length 1 1/4
Thread Type UNC (Coarse)
Material Alloy Steel
Finish Black Oxide
Hex Key Size 1/4"
Thread Direction Right Hand
Standard Meets or Exceeds ASME B18.3; BS 2470


Unbrako Socket Head Shoulder Screws are hardened shafts with a knurled head and threaded portion. The shoulder formed where the threads meet the larger diameter body acting as a stop when the screw is threaded into a tapped hole, permitting the screw to be used as a pivot, shaft, or stationary guide. The precision tolerance on the shoulder provides close and accurate mating with the fastened components. Unbrako manufactures to a tolerance position closer than that required by international standards.

  • Precision hex socket provides maximum wrenching strength and full tightening without cracking or reaming socket, along with ample metal in fillet area for maximum head strength.
  • Controlled concentricity between head and body for easier, more accurate assembly

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