STANDARDS.
16. The following standards shall be strictly adhered to as given in the tables noted:
(1.) Table of standard diameters of shafting and key seats.
(2.) Table of standard stock sizes of rounds.
(3.) Table of standard stock sizes of flat steel.
(4.) Table of standard clearance fits.
(5.) Table of standard symbols for notation of riveting.
(6.) Table of standard symbols for pipe fittings.
Also such other standards as may be adopted from time to time.