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ISO 299:1987
Machine tool tables - T-slots and corresponding bolts
This second edition cancels and replaces the first edition (ISO 299 : 1973), of which the dimensions in inches have been deleted and to which clause 5 has been added. Specifies, in millimetres, the dimensions and spacing of T-slots. It also specifies the metric dimensions of bolts to be used in these slots.
International Organization for Standardization [iso]