|
| Nominal Diameter |
Threads per inch |
Thread Length |
Overall Length |
| 1/4 |
20 |
38 |
110 |
| 5/16 |
18 |
43 |
125 |
| 3/8 |
16 |
48 |
140 |
| 7/16 |
14 |
55 |
160 |
| 1/2 |
13 |
59 |
180 |
| 9/16 |
12 |
64 |
200 |
| 5/8 |
11 |
70 |
200 |
| 3/4 |
10 |
70 |
200 |
| 7/8 |
9 |
85 |
280 |
| 1 |
8 |
95 |
280 |
| 1.1/8 |
7 |
109 |
315 |
| 1.1/4 |
7 |
109 |
355 |
| 1.3/8 |
6 |
127 |
400 |
| 1.1/2 |
6 |
127 |
400 |
| 1.3/4 |
5 |
153 |
500 |
| 2 |
4.1/2 |
170 |
560 |
|
Dimension in mm / Inches
Specification Conform to BS : 949 - 1969
These Taps are usally Supplied in set of three - Taper, Lead of 2/3 Thread Length.
|
UNF - Unified Fine Thread Series
|
| Nominal Diameter |
Threads per inch |
Thread Length |
Overall Length |
| 1/4 |
28 |
28 |
110 |
| 5/16 |
24 |
32 |
125 |
| 3/8 |
24 |
32 |
140 |
| 7/16 |
20 |
38 |
160 |
| 1/2 |
20 |
38 |
180 |
| 9/16 |
8 |
43 |
200 |
| 5/8 |
18 |
43 |
200 |
| 3/4 |
16 |
48 |
250 |
| 4/8 |
14 |
55 |
280 |
| 1 |
12 |
64 |
280 |
| 1.1/8 |
12 |
64 |
315 |
| 1.1/4 |
12 |
64 |
355 |
| 1.3/8 |
12 |
64 |
400 |
| 1.1/2 |
12 |
64 |
400 |
|
Dimension in mm / Inches
Specification Conform to BS : 949 - 1969
These Taps are usally Supplied in set of three - Taper, Lead of 2/3 Thread Length
 .
|
