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This International Standard specifies the characteristics of hexagon head screws with threads from M1.6 up to and including M64,of product grade A for threads M1.6 to M24 and nominal lengths up to and including 10 d or 150mm.whichever is the shorter,and product grade B for threads over 10d or 150mm,which ever is the shorter.

This type of product is the same as that covered by ISO 4014 with the exception of threading up to head and nominal lengths up to including 200mm as preferred lengths.

Standard	Material	Finish	Thread
ISO4014  ISO4017  ISO4018	carbon steel	Plain	UNC
		Zinc plated
	Alloy steel	Yellow zinc plated
		PTFE
	Stainless steel	Black	UNF
		Dacromet
	Other	HDG
		Other

ISO4014