Fry, Horace Pugh. [from old catalog] · Philadelphia · leaf 66
Fig. 44. TAPPED HOLES. 1. The diameter of a tapped (threaded)hole is the outside diameter of the threaded piece that would fit that hole, not R the … 0=DIAM OF TAP R = ROOT DIAM. D = DRILL DIAM. H=^ DEPTH DRILLED. T= DEPTH TAPPED.D=R, APPROXIMATELYHIDDEN THREADS AREALWAYS INDICATED A5SHOWN ATX, Fig. 45. the threads at the back of the holedirection to those in the portion cut away reference to Figs. 42, 43, 44 and 45 will make this clear.…
Mechanical drawing
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