JIS 30° Flare Parallel Pipe Threads - JIS B 0202

Japanese equipment uses JIS (Japanese Industrial Standard) couplings with a 30° seat and British Standard Pipe Parallel threads. All flanges are Code 61 or Code 62 (except -10).

These Japanese 30° flare male coupling will mate with a Japanese 30° flare female only. The male and female have straight threads and a 30° seat. The seal is made on the 30° seat. The threads on the Japanese 30° flare connector conform to JIS B 0202, the same as the BSPP threads. Both the British and Japanese connectors have a 30° seat, but they are not interchangeable, because the British seat is inverted.

Thread Identification Table

Identification

• The male and female have straight threads and a 30-degree seat.
• This connector is identical to and interchangeable with the BSPT connector, which is also tapered. Note: the Japanese male thread does not have a 30° flare. It will not mate with the BSPP female swivel with inverted seat.

note: JIS 30˚ Flare uses a 60° inverted seat and BSPP threads. Both the Japanese and British have a 30˚ seat, but the British seat is inverted, so they are not compatible.

Seal

The JIS 30-degree male will only connect with the JIS 30-degree female. The seal is made on the 30-degree seat. The threads hold the connection in place mechanically. The seal on the Japanese tapered pipe thread connector is made on the threads. For best results, always use a thread sealant.

Note: The JIC 37-degree flare is very similar to the JIS 30-degree flare.