The thread section serves as the GO side thread plug gauge, allowing for very precise measurement of the hole position.
● Features
The thread section satisfies GO side thread plug gauge standards, so that can do GO check of a tapped hole at the same time.
Checking the squareness is possible by checking the gap with the end face of pin gauge section.
The gauge material is Gauge steel (SKS3, HRC58 or harder), and the gauge has exceptional wear resintance.
This gause is equipped with a removable knurled handle, not to touch the pin gauge section directly (The handle can be removed if it interferes with the measurement).
An inspection report for the thread gauge and pin gauge sections is included with to provide confidence and assurance for users!
● Accuracy
The thread centrality (afferent) acts by fastening, and the thread positioning alignment gauge can maintain the tapped hole center.
⇒Repeatability error of less than 10μ (based on in-house test)
Supporting with the end face of pin gauge section, so that it almost never falls over
Notation Example
Dimensions
Go Metric Thread Plug Gauge
| Type of thread |
Pitch |
L |
D |
a |
b |
Y |
L1 |
Type of Gauge |
Class |
| M3 |
0.5 |
coarse |
10 or 22 |
7 |
±0.001 |
5 |
2 |
6 |
10 |
GP |
Ⅱ（JIS Class）
6H （ISO Class）
※M1.4[5H] |
| M4 |
0.7 |
coarse |
6 |
| M5 |
0.8 |
coarse |
8 |
7 |
| M6 |
1.0 |
coarse |
9 |
8 |
2.5 |
| M7 |
1.0 |
coarse |
10 |
| M8 |
1.25 |
coarse |
11 |
±0.0015 |
10 |
3 |
10 |
| M8 |
1.0 |
fine |
| M9 |
1.25 |
coarse |
12 |
| M10 |
1.5 |
coarse |
13 |
12 |
| M10 |
1.25 |
fine |
| M10 |
1.0 |
fine |
| M12 |
1.75 |
coarse |
15 |
14 |
| M12 |
1.5 |
fine |
| M12 |
1.25 |
fine |
| M14 |
2.0 |
coarse |
17 |
14 |
14 |
| M14 |
1.5 |
fine |
| M14 |
1.25 |
fine |
| M16 |
2.0 |
coarse |
19 |
| M16 |
1.5 |
fine |
| M18 |
2.5 |
coarse |
21 |
±0.002 |
16 |
4 |
| M18 |
2.0 |
fine |
| M18 |
1.5 |
fine |
| M20 |
2.5 |
coarse |
23 |
| M20 |
2.0 |
fine |
| M20 |
1.5 |
fine |
- ※Other specifications are available (effective diameter can be changed for fine, extra-fine, and pre-plating sections).
Unified thread plug gauge
| coarse |
fine |
L |
D |
a |
b |
Y |
L1 |
Type of gauge |
Class |
| No.4-40UNC |
No.4-48UNF |
10 or 22 |
7 |
5 |
2 |
6 |
10 |
GP |
2B
（JIS Class）
|
| No.5-40UNC |
No.5-44UNF |
6 |
| No.6-32UNC |
No.6-40UNF |
| No.8-32UNC |
No.8-36UNF |
| No.10-24UNC |
No.10-32UNF |
8 |
7 |
| No.12-24UNC |
No.12-28UNF |
| 1/4-20UNC |
1/4-28UNF |
9 |
8 |
2.5 |
| 5/16-18UNC |
5/16-24UNF |
11 |
10 |
3 |
10 |
| 3/8-16UNC |
3/8-24UNF |
13 |
12 |
| 7/16-14UNC |
7/16-20UNF |
14 |
14 |
| 1/2-13UNC |
1/2-20UNF |
16 |
14 |
14 |
| 9/16-12UNC |
9/16-18UNF |
17 |
| 5/8-11UNC |
5/8-18UNF |
19 |
| 3/4-10UNC |
3/4-16UNF |
22 |
16 |
4 |
| 7/8-9UNC |
7/8-14UNF |
25 |
20 |
5 |
| 1-8UNC |
1-12UNF |
28 |
- ※Other specifications are available (effective diameter can be changed for fine, extra-fine, and pre-plating sections).