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Flat Head Socket Cap Screws

What is a Flat Head Socket Cap Screw?

A flat head socket cap screw is a cap screw with a flat head that has a flat top surface, and a conical bearing surface. The head angle is 82 degrees. Flat socket cap screws are most commonly made with allen drives, but they are also made with spline drives or allen drives with a post when security is an issue.

Because of the conical shape of the bearing surface, flat head cap screws require a countersunk hole for proper installation.

The allen drive allows the screw to be installed with an allen wrench.  

What Do We Sell Online?

Online, U-Turn Fasteners sells flat head socket cap screws that are made to the dimensional standards of ASME/ANSI B18.3-2002. The material is alloy steel that meets the requirements of ASTM F835. They have a flat head with a hex drive.

Online, we list diameters from ¼” through ½”; however diameters ranging from #00 to ¾” are readily available.

Flat Head Socket Cap Screws usually ship out the same day when ordered by 12:00 PM CST. They will ship from our warehouse or distribution centers located throughout the country.

Other Varieties

U-Turn Fasteners supplies a variety of flat head cap screws not listed online, including but not limited to the following:

  • Zinc Plated Alloy Steel Button Head Socket Cap Screws made to ASME/ASNI B18.3-2002 that meets ASTM F835. Zinc plating is CR+3, and screws are baked after plating. 
  • Stainless Steel Flat Head Socket Cap Screws made to ASME/ANSI B18.3-2002 in 18-8 Stainless that meets ASTM F879.
  • Tamper Resistant Flat Head Socket Cap Screws made to ASME/ANSI B18.3-2002. These come in ASTM F835 Alloy Steel, or ASTM F879 18-8 Stainless Steel.
  • Alloy Steel Flat Head Socket Cap Screws with a Nylon Patch or a Nylon Pellet made to ASME/ASNI B18.3-2002 that meets ASTM F835 and IFI 124.

For a quote on any of these varieties or a size not listed online, give us a call or email mricard@uturnfasteners.com