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Japanese Tapered Pipe Thread
The Japanese tapered pipe thread connector is identical to
and fully interchangeable with the BSPT (tapered) connector.
The Japanese connector does not have a 30° Flare, and will
not mate with the BSPP female.
The threads conform to JIS B 0203, which are the same
as BSPT threads.
The seal on the Japanese tapered pipe thread connector
is made on the threads.
| Dash Size |
Nominal Size (In.) |
Thread Size |
Male Tapered Thread I.D. (In.) |
Female Tapered Thread O.D. (In.) |
| -2 |
1/8 |
1/8 -28 |
3/8 |
11/32 |
| -4 |
1/4 |
1/4 -19 |
17/32 |
7/16 |
| -6 |
3/8 |
3/8 -19 |
21/32 |
19/32 |
| -8 |
1/2 |
1/2 -14 |
13/16 |
3/4 |
| -12 |
3/4 |
3/4 -14 |
1 1/32 |
15/16 |
| -16 |
1 |
1-11 |
1 5/16 |
1 3/16 |
| -20 |
1 1/4 |
1 1/4 -11 |
1 21/32 |
1 17/32 |
| -24 |
1 1/2 |
1 1/2 -11 |
1 7/8 |
1 25/32 |
| -32 |
2 |
2-11 |
2 11/32 |
2 7/32 |
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