Widths across flats for bolts, screws, valves and fittings
|Publication Date:||1 November 2016|
|ICS Code (Pipeline components and pipelines in general):||23.040.01|
|ICS Code (Fasteners in general):||21.060.01|
The widths of flats in accordance with this standard apply to all 2-flats, squares, hexagons and octagons, even if they are not moved by wrenches.
DIN 79 applies to squares and square holes for spindles, handwheels and crank handles, and DIN 10-1 applies to squares for tools.
NOTE A selection of widths across flats of hexagon bolts, screws and nuts is given in DIN ISO 272. 2