Metal Roofing Screw

 In Blog

A metal roofing screw is a type of fastener that fastens your roof to its particular foundation. It is typically made of metal and is in a form of a helical ridge, also known as a male thread or just commonly called as a thread. A perfect fit size of your metal roofing screw is needed so that you will have a good quality roofing. The metal roofing screws differ in sizes which are based on its major thread diameter, threads per inch, length, head style and type of drill point. The screw diameter is a value used to describe the diameter of its thread. The threads per inch are the number of threads there are in a length of one inch. It varies upon the material for which the metal roofing screw is designed.

A #0 screw has a thread diameter of 1/16 inch and a fine thread UNF of 80.

A #1 screw has a thread diameter of 5/64 inch, a fine thread UNF of 72 and a coarse thread UNC of 64.

A #2 screw has a thread diameter of 3/32 inch, a fine thread UNF of 64 and a coarse thread UNC of 56.

A #3 screw has a thread diameter of 7/64 inch, a fine thread UNF of 56 and a coarse thread UNC of 48. A #4 screw has also a thread diameter of 7/64 inch, a fine thread UNF of 48 and a coarse thread UNC of 40.

A #5 screw has a thread diameter of 1/8 inch, a fine thread UNF of 44 and a coarse thread UNC of 40.

A #6 screw has a thread diameter of 9/64 inch, a fine thread UNF of 40 and a coarse thread UNC of 32.

A #8 screw has a thread diameter of 5/32 inch, a fine thread UNF of 36 and a coarse thread UNC of 32.

A #10 screw has a thread diameter of 3/16 inch, a fine thread UNF of 32 and a coarse thread UNC of 24.

A #12 screw has a thread diameter of 7/32 inch, a fine thread UNF of 28 and a coarse thread UNC of 24.

And lastly, a #14 screw has a thread diameter of 1/4 inch, a fine thread UNF of 28 and a coarse thread UNC of 20.

The length of the metal roofing screw indicates the length of the fastener body where its head is not included. The head style of the metal roofing screw is identified with a number of different descriptions. The most commonly used head style of the metal roofing screws is HWH or Hex Washer Head. An HWH does not always have a washer with it because there can be an HWH with a washer or an HWH without a washer. The last thing in defining a size of the metal roofing screw is its type of drilling point. The type of drilling point is normally designated as #1, #2, #3, #4, #5 and #6 and so on and so forth. The drill point is the thickness of the metal where a fastener is perfectly designed.

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