Historical
ISO 5856:1991
Aerospace - Screws, 100 degrees normal countersunk head, internal offset cruciform ribbed drive, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa - Dimensions
Specifies the dimensions of head screws. Figure 1 illustrates the dimensions and parameters given in table 1 which includes diameter codes from 030 up to 200.
International Organization for Standardization [iso]