Screw Numbers | Diameter of Screw
, B3 h& b4 R+ U: V( h A* c0 e- pOver Thread | Threads per inch | Pitch | Diameter
$ J+ I" }7 M4 sat Thread Bottom | Tapping Drill Size |
16 BA | 0.0310 inch | 133.3 tpi | 0.0075 inch | 0.0220 inch | Number drill 73$ E% @1 K( B0 y
0.6 mm% r4 a5 B R0 S2 l' `) w! \ M
0.0236 inch |
15 BA | 0.035 inch | 120.5 tpi | 0.0083 inch | 0.025 inch | Number drill 70& K" d% q Q8 s7 B, @% u& Y
0.7 mm2 b8 D% _# {1 X+ Z
0.0276 inch |
14 BA | 0.039 inch | 109.9 tpi | 0.0091inch | 0.028 inch | 0.8 mm- h4 f: m9 j6 C" B" q
0.0315 inch |
13 BA | 0.047 inch | 102 tpi | 0.0098 inch | 0.0352 inch | Number drill 62 a- j) r5 P; ?% P! U e/ @9 s
0.98 mm( x2 z+ m' K" Q" T- _3 U1 L
0.0386 inch |
12 BA | 0.051 inch | 90.9 tpi | 0.011 inch | 0.0378 inch | Number drill 60$ A+ ]$ C' T0 Q z; P
1.05 mm
3 J3 v/ K- ]% v" s* g0.0413 inch |
11 BA | 0.059 inch | 81.9 tpi | 0.0122 inch | 0.0443 inch | Number drill 56
+ B, t. y* U0 q0 y1 d1.2 mm, l: B! l; l! ]+ f; F, ^0 J
0.0472 inch |
10 BA | 0.067 inch | 72.6 tpi | 0.0138 inch | 0.0504 inch | Number drill 54
7 @$ R! J2 L0 R/ C+ s5 o1.4 mm
5 X& q/ q n0 P2 J9 q+ M0.0551 inch |
9 BA | 0.075 inch | 65.1 tpi | 0.0154 inch | 0.0565 inch | 1.55 mm
5 |* S2 k M, B. e( w" x2 Y8 N0.061 inch |
8 BA | 0.086 inch | 59.1 tpi | 0.0169 inch | 0.0657 inch | Number drill 508 K/ d6 }* u$ y
1.8 mm
- q6 I3 Q' z+ r, K; S& B8 V0.0709 inch |
7 BA | 0.0982 inch | 52.9 tpi | 0.0189 inch | 0.0753 inch | Number drill 46
9 Q% p, |' T0 n" B5 l2.05 mm
- d6 Y8 F) }& ^+ }) }0.0807 inch |
6 BA | 0.11 inch | 47.9 tpi | 0.0209 inch | 0.0849 inch | 2.3 mm- @7 `; U4 y6 }+ l1 Z
0.0906 inch |
5 BA | 0.126 inch | 43 tpi | 0.0232 inch | 0.0981 inch | Number drill 379 H$ M& P: E! U) W. m& }
2.65 mm
$ M' a* S6 _9 g/ p9 |5 M; k* O9 L0.1043 inch |
4 BA | 0.1420 inch | 38.5 tpi | 0.0260 inch | 0.1108 inch | Number drill 31
2 m7 g7 ]7 i! T3 mm1 c9 Y# o# e& J2 k K; W; D6 Q
0.1181 inch |
3 BA | 0.1610 inch | 34.8 tpi | 0.0287 inch | 0.1266 inch | Number drill 29
* W) F9 p3 o0 u. a- A0 D3.4 mm
+ P0 c+ d; }6 y0.1339 inch |
2 BA | 0.1850 inch | 31.4 tpi | 0.0319 inch | 0.1467 inch | Number drill 22
; y9 j1 \3 D1 e4 mm9 d m4 a9 \: R: {
0.1575 inch |
1 BA | 0.2090 inch | 28.2 tpi | 0.0354 inch | 0.1665 inch | Number drill 16
' `. Z% w2 s5 ?& M5 {4.5 mm0 c6 L1 ?5 i7 B, H. q) l
0.1772 inch |
0 BA | 0.2360 inch | 25.4 tpi | 0.0394 inch | 0.1887 inch | Number drill 9
9 q: T0 _ }; U. d4 G8 y( e5.1 mm" m7 @: o) x& `
0.2008 inch |