| THREAD SIZE COMPARISON |
| METRIC PRODUCTS |
UNIFIED INCH PRODUCTS |
B.S.INCH PRODUCTS |
| SIZE |
THREAD PITCH & T.P.I. |
Major Dia. |
SIZE |
T.P.I. |
Major |
SIZE |
T.P.I. |
Major |
|
Major |
| COARSE |
FINE |
Dia. |
Dia |
T.P.I. |
Dia |
| |
PITCH |
T.P.I. |
PITCH |
T.P.I. |
|
|
|
UNC |
UNF |
|
|
BSW |
BSF |
|
BA |
|
| |
mm |
|
mm |
|
mm |
inch |
|
|
|
inch |
|
|
|
inch |
|
inch |
| M3 |
0.50 |
51.00 |
|
|
3.00 |
0.118 |
# 5 |
40 |
44 |
0.125 |
|
40 |
|
0.125 |
|
|
| |
|
|
|
|
|
|
|
|
|
|
5BA |
|
|
|
43.1 |
0.126 |
| |
|
|
|
|
|
|
# 6 |
32 |
40 |
0.138 |
4BA |
|
|
|
38.5 |
0.142 |
| M4 |
0.70 |
36.00 |
|
|
4.00 |
0.157 |
# 8 |
32 |
36 |
0.164 |
3BA |
|
|
|
34.8 |
0.161 |
| M5 |
0.80 |
32.00 |
|
|
5.00 |
0.197 |
# 10 |
24 |
32 |
0.190 |
3/16″ |
24 |
32 |
0.187 |
|
|
| |
|
|
|
|
|
|
|
|
|
|
2BA |
|
|
|
31.3 |
0.185 |
| |
|
|
|
|
|
|
|
|
|
|
1BA |
|
|
|
28.2 |
0.209 |
| M6 |
1.00 |
25.00 |
|
|
6.00 |
0.236 |
1/4″ |
20 |
28 |
0.250 |
0BA |
|
|
|
25.4 |
0.236 |
| |
|
|
|
|
|
|
|
|
|
|
1/4″ |
20 |
26 |
0.250 |
|
|
| M8 |
1.25 |
20.00 |
1.00 |
25 |
8.00 |
0.315 |
5/16″ |
18 |
24 |
0.313 |
5/16″ |
18 |
22 |
0.313 |
|
|
| M10 |
1.50 |
17.00 |
1.25 |
20 |
10.00 |
0.394 |
|
|
|
|
|
|
|
|
|
|
| |
|
|
1.00 |
25 |
10.00 |
0.394 |
3/8″ |
16 |
24 |
0.375 |
3/8″ |
16 |
20 |
0.375 |
|
|
| |
|
|
|
|
|
|
7/16″ |
14 |
20 |
0.438 |
|
|
|
|
|
|
| M12 |
1.75 |
14.50 |
1.50 |
17 |
12.00 |
0.472 |
|
|
|
|
|
|
|
|
|
|
| |
|
|
1.25 |
20 |
12.00 |
0.472 |
1/2″ |
13 |
20 |
0.500 |
1/2″ |
12 |
16 |
0.500 |
|
|
| (M14) |
2.00 |
12.50 |
1.50 |
17 |
14.00 |
0.551 |
|
|
|
|
|
|
|
|
|
|
| M16 |
2.00 |
12.50 |
1.50 |
17 |
16.00 |
0.630 |
5/8″ |
11 |
18 |
0.625 |
5/8″ |
11 |
14 |
0.625 |
|
|
| (M18) |
2.50 |
10.00 |
1.50 |
17 |
18.00 |
0.709 |
|
|
|
|
|
|
|
|
|
|
| M20 |
2.50 |
10.00 |
1.50 |
17 |
20.00 |
0.787 |
3/4″ |
10 |
16 |
0.750 |
3/4″ |
10 |
12 |
0.750 |
|
|
| M22 |
2.50 |
10.00 |
1.50 |
17 |
22.00 |
0.866 |
7/8″ |
9 |
14 |
0.875 |
7/8″ |
9 |
11 |
0.875 |
|
|
| M24 |
3.00 |
8.50 |
2.00 |
13 |
24.00 |
0.945 |
1″ |
8 |
12 |
1.000 |
1″ |
8 |
10 |
1.000 |
|
|
| |
|
|
|
|
24.00 |
0.945 |
|
|
|
|
|
|
|
|
|
|
| M27 |
3.00 |
8.50 |
|
|
27.00 |
1.060 |
1.1/8″ |
7 |
12 |
1.125 |
1.1/8″ |
7 |
9 |
1.125 |
|
|
| M30 |
3.50 |
7.30 |
|
|
30.00 |
1.181 |
1.1/4″ |
7 |
12 |
1.250 |
1.1/4″ |
7 |
9 |
1.250 |
|
|
| M33 |
3.50 |
7.30 |
|
|
33.00 |
1.299 |
|
|
|
|
|
|
|
|
|
|
| M36 |
4.00 |
6.30 |
|
|
36.00 |
1.417 |
1.1/2″ |
6 |
12 |
1.500 |
1.1/2″ |
6 |
8 |
1.500 |
|
|
| M42 |
4.50 |
5.60 |
|
|
42.00 |
1.653 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| SHCS of size above 1″ are either as per ANSI B18.3 OR as per LPS-STANDARD |
|
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