À gauche, un taraud et une poignée de support. À droite, un ensemble de tarauds avec 2 types de poignées.At left, a tap with a support handle. At right, a set of taps with 2 types of support handles.
75% est la profondeur moyenne normalisée pour les filets et elle peut varier de 50 à 85%. La profondeur idéale des filets pourra varier selon le diamètre du trou, du type de matériaux devant être filé, de la profondeur du trou à filer, et de l’angle des filets. Pour les métaux durs, choisissez la mèche qui produira des filets peu profonds, par exemple 50-60%. Pour les métaux mous, le bois et les plastiques, utilisez une mèche qui produira des filets plus profonds, soit, par exemple, 70-80%.75% thread engagement is a standard average and may vary form 50 to 85%. The best thread depth will vary according to the diameter of the hole, the kind of material being tapped, the depth of the tapped hole, and the pitch fo the threads. In hard metals, pick the drill that gives lower thread engagement, for example, 50-60%. With soft metals, wood or plastics, use the bit that gives higher thread engagement, for example, 70-80%.
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Filets grossiers National Américain / American National Coarse Threads
| ||||
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Calibre du taraud
Tap size
|
Diametre du boulon
Bolt diameter
|
Grosseur de mèche
Drill size
|
Diamètre de mèche – pouces
Drill diameter – Inches
|
Profondeur des filets en %
% Full thread depth
|
|
4-40
|
0.112"
|
#44
|
0.0860
|
80
|
|
|
|
#43
|
0.0890
|
71
|
|
|
|
2.3 mm
|
0.0906
|
66
|
|
|
|
3/32"
|
0.0938
|
56
|
|
6-32
|
0.138"
|
#36
|
0.1065
|
78
|
|
|
|
7/64"
|
0.1094
|
70
|
|
|
|
#33
|
0.1130
|
62
|
|
|
|
1/8"
|
0.1250
|
56
|
|
8-32
|
0.164"
|
3.40 mm
|
0.1339
|
74
|
|
|
|
#29
|
0.1360
|
69
|
|
|
|
3.50 mm
|
0.1378
|
65
|
|
10-24
|
0.185"
|
9/64"
|
0.1406
|
85
|
|
|
|
#26
|
0.1470
|
79
|
|
|
|
#24
|
0.1520
|
70
|
|
|
|
#23
|
0.1540
|
67
|
|
|
|
5/32"
|
0.1563
|
66
|
|
1/4"-20
|
0.250"
|
3/16"
|
0.1875
|
96
|
|
|
|
#8
|
0.1990
|
79
|
|
|
|
#7
|
0.2010
|
75
|
|
|
|
13/64"
|
0.2031
|
72
|
|
|
|
7/32"
|
0.2188
|
48
|
|
5/16"-18
|
0.313"
|
1/4"
|
0.2500
|
87
|
|
|
|
F
|
0.2570
|
77
|
|
|
|
G
|
0.2610
|
71
|
|
|
|
17/64"
|
0.2556
|
65
|
|
3/8"-16
|
0.375"
|
5/16"
|
0.3125
|
77
|
|
|
|
O
|
0.3160
|
76
|
|
|
|
P
|
0.3260
|
64
|
|
|
|
21/64"
|
0.3281
|
58
|
|
7/16"-14
|
0.438"
|
23/64"
|
0.3594
|
84
|
|
|
|
U
|
0.3680
|
75
|
|
|
|
3/8"
|
0.3750
|
67
|
|
1/2"-13
|
0.500"
|
27/64"
|
0.4219
|
78
|
|
|
|
11.0 mm
|
0.4331
|
67
|
|
|
|
7/16"
|
0.4375
|
62
|
|
Filets fins National Américain / American National Fine Threads
| ||||
|
Calibre du taraud
Tap size
|
Diametre du boulon
Bolt diameter
|
Grosseur de mèche
Drill size
|
Diamètre de mèche – pouces
Drill diameter – Inches
|
Profondeur des filets en %
% Full thread depth
|
|
4-48
|
0.112
|
2.30 mm
|
0.0906
|
79
|
|
|
|
#42
|
0.0935
|
68
|
|
|
|
3/32"
|
0.0938
|
68
|
|
|
|
#41
|
0.0960
|
59
|
|
6-40
|
0.138
|
7/64"
|
0.1094
|
88
|
|
|
|
#33
|
0.1130
|
77
|
|
|
|
#32
|
0.1160
|
68
|
|
8-36
|
0.164
|
3.40 mm
|
0.1339
|
83
|
|
|
|
#29
|
0.1360
|
78
|
|
|
|
3.50 mm
|
0.1378
|
73
|
|
|
|
9/64"
|
0.1406
|
65
|
|
10-32
|
0.190
|
5/32"
|
0.1563
|
83
|
|
|
|
#21
|
0.1590
|
76
|
|
|
|
#20
|
0.1610
|
71
|
|
|
|
#19
|
0.1660
|
59
|
|
1/4"-28
|
0.250
|
#3
|
0.2130
|
80
|
|
|
|
5.5 mm
|
0.2165
|
72
|
|
|
|
7/32"
|
0.2188
|
67
|
|
|
|
Q
|
0.3320
|
79
|
|
5/16"-24
|
0.313
|
17/64"
|
0.2656
|
87
|
|
|
|
I
|
0.2720
|
75
|
|
|
|
J
|
0.2770
|
66
|
|
3/8"-24
|
0.375
|
21/64"
|
0.3281
|
87
|
|
|
|
R
|
0.3390
|
67
|
|
7/16"-20
|
0.438
|
W
|
0.3860
|
79
|
|
|
|
25/64"
|
0.3906
|
72
|
|
|
|
X
|
0.3970
|
62
|
|
|
|
13/32"
|
0.4063
|
48
|
|
1/2"-20
|
0.500
|
29/64"
|
0.4531
|
72
|
|
|
|
15/32"
|
0.4688
|
48
|
Posted by Serge 
Atelier du Bricoleur (menuiserie)…..…… Woodworking Hobbyist's Workshop 