Screw Numbers | Diameter of Screw & I* L: t$ D, L8 ^. z
Over Thread | Threads per inch | Pitch | Diameter # Q, v$ a9 D7 i* \ z1 v4 A
at Thread Bottom | Tapping Drill Size |
16 BA | 0.0310 inch | 133.3 tpi | 0.0075 inch | 0.0220 inch | Number drill 73
7 m" y c6 H9 Y6 Q( F; ~/ Q0.6 mm
5 ?- ?7 L8 v6 \4 Y C0.0236 inch |
15 BA | 0.035 inch | 120.5 tpi | 0.0083 inch | 0.025 inch | Number drill 705 y5 @# N2 y; n# e
0.7 mm
" o! [2 q1 B5 p; z0.0276 inch |
14 BA | 0.039 inch | 109.9 tpi | 0.0091inch | 0.028 inch | 0.8 mm
7 @ x+ d6 F* ~# c" b2 w0.0315 inch |
13 BA | 0.047 inch | 102 tpi | 0.0098 inch | 0.0352 inch | Number drill 62
+ O1 @( p4 Z4 I x% \6 h0 D6 Z0.98 mm; q ~/ F* J6 n- }) B
0.0386 inch |
12 BA | 0.051 inch | 90.9 tpi | 0.011 inch | 0.0378 inch | Number drill 60
" L" p5 \# b: B% M1.05 mm
. [2 @+ X4 \1 F, L6 T F e0.0413 inch |
11 BA | 0.059 inch | 81.9 tpi | 0.0122 inch | 0.0443 inch | Number drill 56
" K5 ?$ K1 D, y- V* s' E0 ^( V1.2 mm# V7 x" F! }: Q
0.0472 inch |
10 BA | 0.067 inch | 72.6 tpi | 0.0138 inch | 0.0504 inch | Number drill 54
8 |7 K) m! c( B5 J1.4 mm6 Y3 f4 g% ~* }8 I3 M) O; E8 E S
0.0551 inch |
9 BA | 0.075 inch | 65.1 tpi | 0.0154 inch | 0.0565 inch | 1.55 mm0 n" H4 m6 K, E3 Q- \! U
0.061 inch |
8 BA | 0.086 inch | 59.1 tpi | 0.0169 inch | 0.0657 inch | Number drill 50* o$ T( L. \8 i( ?; ^
1.8 mm7 E7 |1 h8 m3 S( x* t3 g
0.0709 inch |
7 BA | 0.0982 inch | 52.9 tpi | 0.0189 inch | 0.0753 inch | Number drill 460 F7 h& r5 _# W% P. y6 l
2.05 mm
: M( Q! p7 n9 k m& }( N0.0807 inch |
6 BA | 0.11 inch | 47.9 tpi | 0.0209 inch | 0.0849 inch | 2.3 mm
- B5 Y& q# E6 D" Y) c0.0906 inch |
5 BA | 0.126 inch | 43 tpi | 0.0232 inch | 0.0981 inch | Number drill 37% I# Q1 h" ]' P2 }9 Q2 ]4 X& P5 \2 i
2.65 mm
9 X z8 D z$ S( D* j* K0 d# D* D% z0.1043 inch |
4 BA | 0.1420 inch | 38.5 tpi | 0.0260 inch | 0.1108 inch | Number drill 31
7 ~ q G% _; P6 k0 h3 mm) v: y) c9 S8 E" v$ V
0.1181 inch |
3 BA | 0.1610 inch | 34.8 tpi | 0.0287 inch | 0.1266 inch | Number drill 29- h1 m; ?: X1 [1 A2 h! d
3.4 mm [- R; L" o. ?- E% d) J1 t- d
0.1339 inch |
2 BA | 0.1850 inch | 31.4 tpi | 0.0319 inch | 0.1467 inch | Number drill 22$ c9 T* Y) h1 A' ]* v* b
4 mm c# Y) B# r. C) m# z& T
0.1575 inch |
1 BA | 0.2090 inch | 28.2 tpi | 0.0354 inch | 0.1665 inch | Number drill 163 q1 N# ^3 B1 D2 b9 z; O
4.5 mm
5 |) e. S7 p5 G5 L: K. n0.1772 inch |
0 BA | 0.2360 inch | 25.4 tpi | 0.0394 inch | 0.1887 inch | Number drill 9
/ X& F2 I/ i4 U# e5.1 mm, _) T* N ?' x! d$ }8 I
0.2008 inch |