Slotted Flat Head Screw

These type thread-forming screws form widely spaced threads in sheet metal and soft metal such as cast iron. They have a blunt tip with an incomplete thread near the end for easy entry. Screws noted have an undercut head to allow more threading.

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Detailed Description for Slotted Flat Head Screw


Stainless steel,carbon steel,brass,aluminum etc


Zinc-plated,Ni-plated,Tin-plated,Passivate,Radiant etc.

Flat head machine screw length is measured from the top of the head to the end of the screw.

  • Tensile Strength: 120,000 psi min
  • Rockwell Hardness: Rc 25/34

The slots on the  line of flat heads may be manufactured by slotting the full length of the head or (for the most popular sizes) It utilizes a cold formed slot that increases the head strength and prevents collapsing of the slot when the screws are assembled into missed formed or damaged slots or subjected to high working loads in the application. The cold formed slot does not extend to the outside edge of the head. The material that remains provides added strength to the head. The alternative slot design is only applied to high volume sizes. 




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