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Approval by the Secretaries of War Navy and Commerce
Screw threads for bolts machine screws nuts tapped holes
Uniform pitch screw thread series for highpressure fasten
10 other sections not shown
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Acme threads American National coarse American National fire-hose American National form American Standards Association angle of thread axis basic major diameter basic thread depth bolts class of fit depth of thread diam dimensions and tolerances eter external thread fire-hose coupling threads form of thread formula free fit gage tolerance gaging notch given in table given pitch half angle helix angle hose-coupling Inch Inch Inch iTol lathe tools lead and angle lead errors lead screw length of engagement limiting dimensions maximum minor maximum screw medium fit milling cutter minimum major minimum minor diameter minimum nut Minimum pitch diameter National pipe thread nipple number of threads oi oi oi pitch diameter tolerances screw threads shank snap gage specified in table taper pipe thread tapped hole thread form thread gages thread plug gage thread series Thread.—The threaded pipe threading tools threads per inch Tolerance on pitch tolerances specified width of flat wires