Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter

This SAE Aerospace Standard (AS) specifies the characteristics of screw threads - UNJ profile inch series, including a mandatory controlled radius as specified in Table 1 at the root of the external thread. The minor diameter of both external and internal threads provides a basic thread height of .5625H to accommodate the external thread maximum root radius. The following detailed design requirements are included:aScrew threads - UNJ basic profile and design profiles.bStandard series of diameter-pitch combinations for nominal thread diameters from 0.060 to 6.000 inches.cStandard thread classes and form tolerances.dFormulae for thread dimensions and tolerances.eMethod of designating UNJ threads.fTables for selected diameter-pitch combinations for close tolerance mechanical thread applications.gTables for screw thread - UNJ profile thread limit dimensions.Cross Reference: ASMEB1.1,ASMEB1.2,ASMEB1.3,ASMEB1.7,ASMEB46.1,ASMEB47.1,FED-STD-H28/20,FED-STD-H28/6