Screw Numbers | Diameter of Screw : e1 I& Z1 @# `5 U# O/ h
Over Thread | Threads per inch | Pitch | Diameter
4 B1 f4 t3 J6 N; j; vat Thread Bottom | Tapping Drill Size |
16 BA | 0.0310 inch | 133.3 tpi | 0.0075 inch | 0.0220 inch | Number drill 73
; k1 n3 o& p, Y/ J2 v2 y0.6 mm5 Z& ^. w/ [$ }& }. E8 R
0.0236 inch |
15 BA | 0.035 inch | 120.5 tpi | 0.0083 inch | 0.025 inch | Number drill 70
: \! x& t) R7 Z- b+ F% E' [7 a$ Q9 \0.7 mm( k' X- T. `$ U( D3 U7 v: R/ r' F
0.0276 inch |
14 BA | 0.039 inch | 109.9 tpi | 0.0091inch | 0.028 inch | 0.8 mm
& Q. A& }' N6 B/ |3 B9 w3 K: a0.0315 inch |
13 BA | 0.047 inch | 102 tpi | 0.0098 inch | 0.0352 inch | Number drill 62. Q8 I3 Z- H( ^0 s8 C' l
0.98 mm
3 l- F5 U/ D% z$ }0.0386 inch |
12 BA | 0.051 inch | 90.9 tpi | 0.011 inch | 0.0378 inch | Number drill 60( w$ E' ? T$ r, L
1.05 mm, U9 W5 `% P7 e
0.0413 inch |
11 BA | 0.059 inch | 81.9 tpi | 0.0122 inch | 0.0443 inch | Number drill 56
6 D' } M+ u. }1.2 mm
# q! a+ ~# r5 e0.0472 inch |
10 BA | 0.067 inch | 72.6 tpi | 0.0138 inch | 0.0504 inch | Number drill 54
- j. u" i. ~4 w/ I, ~6 G1.4 mm4 v: Y$ F- F) Q: w( B% o, E
0.0551 inch |
9 BA | 0.075 inch | 65.1 tpi | 0.0154 inch | 0.0565 inch | 1.55 mm1 z/ ]# J- x' q! J- ?4 T
0.061 inch |
8 BA | 0.086 inch | 59.1 tpi | 0.0169 inch | 0.0657 inch | Number drill 50
0 P6 X0 l* Y8 P5 ^& _& B6 L1.8 mm. G+ S% H8 ~" M, j
0.0709 inch |
7 BA | 0.0982 inch | 52.9 tpi | 0.0189 inch | 0.0753 inch | Number drill 46
8 A* T# b, `+ M1 `& P7 r2.05 mm" A1 o+ Q9 g# l2 R9 R" w# Q
0.0807 inch |
6 BA | 0.11 inch | 47.9 tpi | 0.0209 inch | 0.0849 inch | 2.3 mm6 t- L d- `9 ]7 U6 J4 u# P# N
0.0906 inch |
5 BA | 0.126 inch | 43 tpi | 0.0232 inch | 0.0981 inch | Number drill 37
4 B+ t) a( j) L) t3 K: H! [4 s2.65 mm3 u1 D( U, }( F. i
0.1043 inch |
4 BA | 0.1420 inch | 38.5 tpi | 0.0260 inch | 0.1108 inch | Number drill 318 e. V0 G+ i4 P* X- v) s
3 mm& N$ n: z( u+ z9 F' {$ E
0.1181 inch |
3 BA | 0.1610 inch | 34.8 tpi | 0.0287 inch | 0.1266 inch | Number drill 29
/ D ?: V* Q, c& U3.4 mm" }" k* \! D8 m6 R* h; C5 I$ b
0.1339 inch |
2 BA | 0.1850 inch | 31.4 tpi | 0.0319 inch | 0.1467 inch | Number drill 22
3 F( D7 S! q# ~3 ~* Q3 J2 W4 mm" b2 M( `0 C9 W/ m
0.1575 inch |
1 BA | 0.2090 inch | 28.2 tpi | 0.0354 inch | 0.1665 inch | Number drill 163 z$ j; O- A! n( b5 h
4.5 mm
+ }& x9 [2 l, f7 _/ D0 O8 \- R0.1772 inch |
0 BA | 0.2360 inch | 25.4 tpi | 0.0394 inch | 0.1887 inch | Number drill 9
3 a3 ^) w" B% C5 j: F5.1 mm9 ^' @; `' g: T, o' d5 X1 \; ?* p% f
0.2008 inch |