Screw Numbers | Diameter of Screw 8 v! v; Z/ c' ~7 {" W0 T6 q
Over Thread | Threads per inch | Pitch | Diameter
# ]: A- X0 W7 nat Thread Bottom | Tapping Drill Size |
16 BA | 0.0310 inch | 133.3 tpi | 0.0075 inch | 0.0220 inch | Number drill 73 }! Y' H( |; I- k5 G8 {1 j* i/ p/ G2 z! ^
0.6 mm! E& M4 k2 Q: f
0.0236 inch |
15 BA | 0.035 inch | 120.5 tpi | 0.0083 inch | 0.025 inch | Number drill 70& q& T. j% h6 j' u0 z9 D
0.7 mm/ P' h' C+ Y) {3 {9 a7 k+ w
0.0276 inch |
14 BA | 0.039 inch | 109.9 tpi | 0.0091inch | 0.028 inch | 0.8 mm/ w2 j% U. s0 Y/ ^7 F1 X7 K
0.0315 inch |
13 BA | 0.047 inch | 102 tpi | 0.0098 inch | 0.0352 inch | Number drill 62* e) N7 {5 |2 b9 f1 d! X3 ^
0.98 mm
3 g: [% p$ F- v, }0.0386 inch |
12 BA | 0.051 inch | 90.9 tpi | 0.011 inch | 0.0378 inch | Number drill 60
5 N8 v2 H9 V4 z. u' k( m- g$ W; u8 ?1.05 mm# n5 ?6 E9 h; x, e$ k) [$ F
0.0413 inch |
11 BA | 0.059 inch | 81.9 tpi | 0.0122 inch | 0.0443 inch | Number drill 56
# M8 M" i; D6 M* X; z. J1.2 mm6 y# Z+ s! |+ R) g' _1 j- ^
0.0472 inch |
10 BA | 0.067 inch | 72.6 tpi | 0.0138 inch | 0.0504 inch | Number drill 54$ t3 f" h! k1 i
1.4 mm
) ]$ e' n b% k0.0551 inch |
9 BA | 0.075 inch | 65.1 tpi | 0.0154 inch | 0.0565 inch | 1.55 mm) h Q# D' B6 h+ w3 O( y
0.061 inch |
8 BA | 0.086 inch | 59.1 tpi | 0.0169 inch | 0.0657 inch | Number drill 50* j# K8 x- S* h1 l3 _6 @; U
1.8 mm$ d2 x6 X, E8 Y1 Z
0.0709 inch |
7 BA | 0.0982 inch | 52.9 tpi | 0.0189 inch | 0.0753 inch | Number drill 46# g1 N" D, l% a$ j* K
2.05 mm
V& M1 H: v+ X# `; o, M$ A5 O) u0 M0.0807 inch |
6 BA | 0.11 inch | 47.9 tpi | 0.0209 inch | 0.0849 inch | 2.3 mm
! n* g$ h2 d6 o _; g$ Y0.0906 inch |
5 BA | 0.126 inch | 43 tpi | 0.0232 inch | 0.0981 inch | Number drill 37% I, v9 H; o7 }
2.65 mm
; g$ ?3 Z) M2 h% g* h0.1043 inch |
4 BA | 0.1420 inch | 38.5 tpi | 0.0260 inch | 0.1108 inch | Number drill 31
$ l% u, e& u5 Q4 t' h; `( x# I3 mm# s. _ U7 @6 k; G. K
0.1181 inch |
3 BA | 0.1610 inch | 34.8 tpi | 0.0287 inch | 0.1266 inch | Number drill 29! Y- ~$ ^$ X2 N4 D( R! s
3.4 mm" T( C- ?5 n7 _5 V, M
0.1339 inch |
2 BA | 0.1850 inch | 31.4 tpi | 0.0319 inch | 0.1467 inch | Number drill 22
6 R. D A# V" v3 i" ~4 mm
! F) \4 N9 [0 H/ m5 V0.1575 inch |
1 BA | 0.2090 inch | 28.2 tpi | 0.0354 inch | 0.1665 inch | Number drill 16
: N1 w, i1 }2 [- B1 O+ T* x5 K4.5 mm
0 ?& V: h+ [) Y, ^3 j1 j0.1772 inch |
0 BA | 0.2360 inch | 25.4 tpi | 0.0394 inch | 0.1887 inch | Number drill 9
! j7 d! D( V z1 ~; \4 t" h5.1 mm# u1 R7 V/ h% L, T
0.2008 inch |