This recommended practice lists the recommended across flats limits for hexagon bar stock drawing callouts. This recommendation is based on the comparison of existing hexagon tolerance standards and minimum wrench openings. These callouts should be used when specifying fluid fitting dimensions in which the unmachined material hex dimension will appear on the finished part as a wrenching surface.
HEXAGON BAR SIZES FOR FLUID FITTINGS
1970-10-01
Aufsatz (Konferenz)
Englisch
HEXAGON BAR AND FORGED WRENCHING FLAT SIZES FOR FLUID FITTINGS
SAE Technical Papers | 1980
Hexagon Bar, Machined Flat and Forged Wrenching Flat Sizes for Fluid Fittings
SAE Technical Papers | 2000
Tolerances, Hexagon Bar, Machined Flat and Forged Wrenching Flat Sizes for Fluid Fittings
SAE Technical Papers | 2013
Tolerances, Hexagon Bar, Machined Flat and Forged Wrenching Flat Sizes for Fluid Fittings, Metric
SAE Technical Papers | 2015
Fittings, Beaded, Fluid Connection
SAE Technical Papers | 2016