Wood Screw


Screws are used to fasten materials by digging in and wedging into a material when turned, while the thread cuts grooves in the fastened material that may help pull fastened materials together and prevent pull-out. There are many screws for a variety of materials; those commonly fastened by screws include wood, sheet metal, and plastic.

Wood Screws
A metal screw with a sharp point designed to attach two pieces of wood together. Wood screws are commonly available with flat, pan or oval-heads. A wood screw generally has a partially unthreaded shank below the head. The unthreaded portion of the shank is designed to slide through the top board (closest to the screw head) so that it can be pulled tight to the board to which it is being attached. 
A wood screw: a) head; b) not threaded shank; c) threaded shank; d) tip.


Type of head  (place on the image, will show the name of type)


  • Flat
  •  
  • Flat Head with Nibs
  •  
  • Pan
  •  
  • Pan Washer
  • Pan with Large Washer
  •  
  • Truss
  •  
  • Fillister
  •  
  • Fillister with Serration
  • Oval
  •  
  • Hexagon with Washer
  •  
  • Undercut
  •  
  • PowerHead (TM)
  • Crown


Driver Required

  • Square
  •  
  • Quadrex
  •  
  • Phillips
  •  
  • Pozi
  • Hex
  •  
  • Flat
  •  
  • Torx
Screw Size ( diameter of shank)

SizeThread Diameter
DecimalNearest Fractional
#00.06"1/16"
#10.07"5/64"
#20.08"3/32"
#30.09"7/64"
#40.11"7/64"
#50.12"1/8"
#60.13"9/64"
#80.16"5/32"
#100.19"3/16"
#120.21"7/32"
#140.24"1/4"

Screw Length (normally is the length of shank)
   It comes from 3/8 inch to 5 inches. 




Screw Thread Type and Point Type

Thread Type
  • Coarse thread
  •  
  • Regular "Twin Lead" thread
  •  
  • Hi-Low Thread
  •  
  • Fine thread
Point Type

  • Regular
  •  
  • Type 17
  •  
  • Type S
  •  
  • Self-Drilling (TEK)
Different Function of Screw
  • Pocket screw
  • Assembly
  • Installation
  • Hinges and Hardware




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