Operator :: X Y THETA DEPTH TH-M3

      Description : threaded hole for M3 screws
        Threaded Hole

      Definition : 
        /TH-M3-layer1 {
 0 0 moveto
 +5 mm 0 exch rlineto
 0 0 moveto
 0 index +5 mm add neg 0 exch rlineto
 } def
/TH-M3-layer2 {
 0 0 moveto
 +3.0 mm 2 div 0 rmoveto
 -3.0 mm 0 rlineto
 0 index neg 0 exch rlineto
 +3.0 mm 0 rlineto
 0 index 0 exch rlineto
 } def
/TH-M3-layer3 {
 0 0 moveto
 +2.2 mm 2 div 0 rmoveto
 -2.2 mm 0 rlineto
 0 index +2 mm add neg 0 exch rlineto
 +2.2 mm 0 rlineto
 0 index +2 mm add 0 exch rlineto

 0 0 moveto
 0 index +2 mm add +1 mm add neg 0 exch rmoveto
 -2.2 mm 2 div +1 mm rlineto

 0 0 moveto
 0 index +2 mm add +1 mm add neg 0 exch rmoveto
 +2.2 mm 2 div +1 mm rlineto
 } def

/TH-M3 {
 3 index 3 index translate
 1 index rotate

 TH-M3-layer1 CentreLine stroke
 TH-M3-layer2 HiddenLine stroke
 TH-M3-layer3 HiddenLine stroke

 1 index neg rotate
 3 index neg 3 index neg translate
 clear
 } def

      Required Definition : 
        /inch {72 mul} def
/cm {inch 2.54 div } def
/mm {cm 10 div } def

/VisibleLine { 0.25 mm setlinewidth [] 0 setdash } def
/HiddenLine { 0.13 mm setlinewidth [0.5 3] 0 setdash } def
/CentreLine { 0.13 mm setlinewidth [12 3 0.5 3] 0 setdash } def

      Reference :
      • ISO 6410-1:1993, Technical drowings - Screw threads and threaded parts - Part 1: General conventions
      • JIS B 0002-1:1998

    Example :