International Organization for Standardization (ISO)
Latest
ISO 7378:1983
Scope
Lays down the dimensions and position of holes for products, recommended for use; tabulates dimensions for thread diameters from 4 mm up to and including 52 mm; gives tolerances for the product grades A, B and C
ISO 7378:1983 history
1983ISO 7378:1983 Fasteners; Bolts, screws and studs; Split pin holes and wire holes