|
API gauges (Number Style) |
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|
gauge Code |
Form of Thread
Inspected |
Pitch |
Taper |
Basic Pitch dia. |
|
NC10 |
V-0.055 |
4.233(6) |
1:8 |
27.000 |
|
NC12 |
V-0.055 |
4.233(6) |
1:8 |
32.131 |
|
NC13 |
V-0.055 |
4.233(6) |
1:8 |
35.331 |
|
NC16 |
V-0.055 |
4.233(6) |
1:8 |
40.869 |
|
NC23 |
V-0.038R |
6.350(4) |
1:6 |
59.817 |
|
NC26 (2 3/8
IF) |
V-0.038R
(V-0.065) |
6.350(4) |
1:6 |
67.767 |
|
NC31 (2 3/8
IF) |
V-0.038R (V-0.065) |
6.350(4) |
1:6 |
80.848 |
|
NC35 |
V-0.038R |
6.350(4) |
1:6 |
89.687 |
|
NC38 (3 1/2
IF) |
V-0.038R (V-0.065) |
6.350(4) |
1:6 |
96.723 |
|
NC40 (4 FH) |
V-0.038R
(V-0.065) |
6.350(4) |
1:6 |
103.429 |
|
NC44 |
V-0.038R |
6.350(4) |
1:6 |
112.192 |
|
NC46 (4 IF) |
V-0.038R
(V-0.065) |
6.350(4) |
1:6 |
117.500 |
|
NC50 (4 1/2
IF) |
V-0.038R (V-0.065) |
6.350(4) |
1:6 |
128.059 |
|
NC56 |
V-0.038R |
6.350(4) |
1:4 |
142.646 |
|
NC61 |
V-0.038R |
6.350(4) |
1:4 |
156.921 |
|
NC70 |
V-0.038R |
6.350(4) |
1:4 |
179.146 |
|
NC77 |
V-0.038R |
6.350(4) |
1:4 |
196.621 |
|
The angle of
form of API gauge: 60° |
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|
API gauges (Regular Style)
|
||||
|
gauge Code |
Form of Thread
Inspected |
Pitch |
Taper |
Basic Pitch dia. |
|
2 3/8 REG |
V-0.040 |
5.080(5) |
1:4 |
60.080 |
|
2 7/8 REG |
V-0.040 |
5.080(5) |
1:4 |
69.605 |
|
3 1/2 REG |
V-0.040 |
5.080(5) |
1:4 |
82.293 |
|
4 1/2 REG |
V-0.040 |
5.080(5) |
1:4 |
110.868 |
|
5 1/2 REG |
V-0.050 |
6.350(4) |
1:4 |
132.944 |
|
6 5/8 REG |
V-0.050 |
6.350(4) |
1:6 |
146.248 |
|
7 5/8 REG |
V-0.050 |
6.350(4) |
1:4 |
170.549 |
|
8 5/8 REG |
V-0.050 |
6.350(4) |
1:4 |
194.731 |
|
The angle of
form of API gauge: 60° |
||||
|
API gauges (Full-Hole Style) |
||||
|
gauge Code |
Form of Thread
Inspected |
Pitch |
Taper |
Basic Pitch dia. |
|
3 1/2 FH |
V-0.040 |
5.080(5) |
1:4 |
94.844 |
|
4 1/2 FH |
V-0.040 |
5.080(5) |
1:4 |
115.113 |
|
5 1/2 FH |
V-0.050 |
6.350(4) |
1:6 |
142.011 |
|
6 5/8 FH |
V-0.050 |
6.350(4) |
1:6 |
165.598 |
|
IF |
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|
5 1/2 IF |
V-0.065 |
6.350(4) |
1:6 |
157.201 |
|
The angle of
form of API gauge: 60° |
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