UNC - Unified Coarse Thread Series |
Nominal Diameter |
Threads per Inch |
Thread Length |
Overall Length |
| 1/4 |
20 |
19 |
66 |
| 5/16 |
18 |
22 |
72 |
| 3/8 |
16 |
24 |
80 |
| 7/16 |
14 |
25 |
85 |
| 1/2 |
13 |
29 |
89 |
| 9/16 |
12 |
30 |
95 |
| 5/8 |
11 |
32 |
102 |
| 3/4 |
10 |
37 |
112 |
| 7/8 |
9 |
38 |
118 |
| 1 |
8 |
45 |
130 |
| 1.1/8 |
7 |
48 |
138 |
| 1.1/4 |
7 |
51 |
151 |
| 1.3/8 |
6 |
57 |
162 |
| 1.1/2 |
6 |
60 |
170 |
| 1.3/4 |
5 |
67 |
187 |
| 2 |
4.1/2 |
70 |
200 |
| 2.1/4 |
4.1/2 |
76 |
221 |
| 2.3/4 |
4 |
79 |
234 |
| 3 |
4 |
83 |
258 |
|
Dimension in mm / Inches
Specification Conform to BS : 949 - 1969
These Taps are usally Supplied in set of three - Taper, Second and Bottoming.
|
UNF - Unified Fine Thread Series |
Nominal Diameter |
Threads per Inch |
Thread Length |
Overall Length |
| 1/4 |
28 |
19 |
66 |
| 5/16 |
24 |
19 |
69 |
| 3/8 |
24 |
20 |
76 |
| 7/16 |
20 |
22 |
82 |
| 1/2 |
20 |
24 |
84 |
| 9/16 |
8 |
25 |
90 |
| 5/8 |
18 |
25 |
95 |
| 3/4 |
16 |
29 |
104 |
| 4/8 |
14 |
33 |
113 |
| 1 |
12 |
35 |
120 |
| 1.1/8 |
12 |
37 |
127 |
| 1.1/4 |
12 |
37 |
17 |
| 1.3/8 |
12 |
39 |
144 |
| 1.1/2 |
12 |
39 |
149 |
|
Dimension in mm / Inches
Specification Conform to BS : 949 - 1969
These Taps are usally Supplied in set of three - Taper, Second and Bottoming.
|
