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Prime-Line 9184091 Socket Set Screws, 5/16 in-18 X 1/2 in, Black Oxide Coated Steel (10 Pack)

4.9 (5) Write Review
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$9.37

$ 5 .03 $5.03

In Stock

About this item

  • Size: 5/16 inch-18 X 1/2 inch
  • Headless screw that sits flush or below the surface once installed
  • Internal socket drive requires Allen wrench (hex key) to install
  • Installs into an internally threaded hole to hold an object into place
  • Often used in machinery to secure gears to shafts
  • Thread Type: Coarse, Thread Class: UNC-3A, Point Style: Cup Point
  • Specification(s) Met: ASME B18.3 and ASTM F912


Socket set cap screws have cup points that produce a thin edge that digs into hard surfaces for a secure hold. This fastener is headless and contains an internal hex drive. Use an Allen wrench (hex key) to secure with required torque as needed. Although often used in machinery, they can be found around the home as well to secure window crank handles to window operators or to hold interior door knobs to spindles. Length is measured from the top of the fastener to the base of the cup point.


R. Pratt
June 19, 2025
This product was delivered exactly as described and replaced a broken one. Works perfectly
Stephen M.
May 8, 2025
Armbet Armwrestling Table Verified
Customer
March 30, 2025
Got what I asked for and on time.
C. J.
March 5, 2025
We have a haybine that was missing a keyway and the set screws on one of the toothed gears. After cleaning up the gear and using thread locking compound on the set screws, the haybine is once again working as it should.
TheFox
January 18, 2025
As described. Used these to replace the ones in my shopsmith 10 er.