Screw Numbers | Diameter of Screw ; k I$ K i9 e0 I. P7 ?5 a9 u+ b8 p c
Over Thread | Threads per inch | Pitch | Diameter
% F/ p, Y0 f9 d4 ^, D1 I- H8 Mat Thread Bottom | Tapping Drill Size |
16 BA | 0.0310 inch | 133.3 tpi | 0.0075 inch | 0.0220 inch | Number drill 730 Q) u4 w, M& { f( H) ^
0.6 mm+ x; m7 g' d9 ?0 ~7 N
0.0236 inch |
15 BA | 0.035 inch | 120.5 tpi | 0.0083 inch | 0.025 inch | Number drill 709 U4 I5 }" V$ @# |( }8 I
0.7 mm- ^7 h6 H9 i v4 w4 K
0.0276 inch |
14 BA | 0.039 inch | 109.9 tpi | 0.0091inch | 0.028 inch | 0.8 mm
9 B. Y/ n: d6 X: c A! O0.0315 inch |
13 BA | 0.047 inch | 102 tpi | 0.0098 inch | 0.0352 inch | Number drill 62. e' m& u7 q0 V4 \, i
0.98 mm
& z4 V6 z* n1 V' k, h0.0386 inch |
12 BA | 0.051 inch | 90.9 tpi | 0.011 inch | 0.0378 inch | Number drill 60( j7 a1 @* C( y3 Y, X2 Y
1.05 mm' t0 t( o1 ^3 \
0.0413 inch |
11 BA | 0.059 inch | 81.9 tpi | 0.0122 inch | 0.0443 inch | Number drill 563 t7 C* C9 ?0 i0 \# Q: L" x- w
1.2 mm
5 K+ a! R2 p* [* Z* j$ {3 `& f" ?$ _0.0472 inch |
10 BA | 0.067 inch | 72.6 tpi | 0.0138 inch | 0.0504 inch | Number drill 544 x- b, a5 o* `; t7 \( t
1.4 mm
$ f( T/ k& C4 c( @* h! W! x6 S0.0551 inch |
9 BA | 0.075 inch | 65.1 tpi | 0.0154 inch | 0.0565 inch | 1.55 mm9 O# H+ k! Z! r, n. I
0.061 inch |
8 BA | 0.086 inch | 59.1 tpi | 0.0169 inch | 0.0657 inch | Number drill 507 a. ]- M7 w; i
1.8 mm
& o, Y4 {" n, }: l0.0709 inch |
7 BA | 0.0982 inch | 52.9 tpi | 0.0189 inch | 0.0753 inch | Number drill 46
- \0 ?/ W, x8 x% k' L, ]2 _2.05 mm& y# i& J; X& P; r
0.0807 inch |
6 BA | 0.11 inch | 47.9 tpi | 0.0209 inch | 0.0849 inch | 2.3 mm
& h, a/ x$ T8 |' U/ z1 a+ {- v0.0906 inch |
5 BA | 0.126 inch | 43 tpi | 0.0232 inch | 0.0981 inch | Number drill 37
5 r3 f4 s: f1 @2 U% @2.65 mm+ _" l* x9 @! b! H1 q: E
0.1043 inch |
4 BA | 0.1420 inch | 38.5 tpi | 0.0260 inch | 0.1108 inch | Number drill 31
: X3 Z! ~" |4 H. ]- ?7 |0 K3 mm
1 d( \% z% W7 t1 X6 Q8 U1 a& w0.1181 inch |
3 BA | 0.1610 inch | 34.8 tpi | 0.0287 inch | 0.1266 inch | Number drill 29/ X# S. T1 C- w0 |2 L
3.4 mm
5 v4 y" ^; u o5 g0.1339 inch |
2 BA | 0.1850 inch | 31.4 tpi | 0.0319 inch | 0.1467 inch | Number drill 22
9 ?8 m2 E- ]9 O- O9 o8 [4 mm$ B; P8 y, G) ?% l
0.1575 inch |
1 BA | 0.2090 inch | 28.2 tpi | 0.0354 inch | 0.1665 inch | Number drill 16
/ J9 {8 k _; m8 {' Y% J. w4.5 mm
5 r7 Z# |) i' o& u3 s1 l. W/ N! a! x0.1772 inch |
0 BA | 0.2360 inch | 25.4 tpi | 0.0394 inch | 0.1887 inch | Number drill 9
# W9 @4 o# j }$ @! Q8 b5.1 mm
$ _: y/ a6 B' O W" ?0.2008 inch |