These standards from ISO, SAE, and IFI cover standardized screw requirements sorted by head. This list covers hex head screw standards.
ISO 4017:2014 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 150 mm, whichever is the shorter, and product grade B for threads over M24 or nominal lengths over 10 d or 150 mm, whichever is the shorter.
ISO 4018:2011 specifies the characteristics of hexagon head screws with threads from M5 up to and including M64, of product grade C.
This standard covers the dimensional standards for large size heavy hex screws that go beyond the sizes covered in ASME B18.2.1. The inch sizes covered are for nominal thread sizes from 3 1/4 through 6 inches.
This standard establishes the requirements for hex flange and indented hex flange screws in sizes 1/4 inch thru 3/4 inches. Provisions include three styles of standard fillets.
ISO 1479:2011 specifies the characteristics of hexagon head tapping screws with thread sizes from ST 2,2 to ST 9,5 inclusive.
This document specifies the characteristics of hexagon washer head drilling screws with tapping screw threads, made of steel, with thread sizes ST2,9 to ST6,3, and with product grade A.
This document specifies the characteristics of hexagon washer head tapping screws, made of steel and stainless steel, with thread sizes ST2,2 to ST8, and with product grade A.
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