JIS and BSP fittings has the same sealing type of 60 degree cone tube connectors, and the same BSPP thread as per ISO 228-1 G, JIS B 0202. But JIS and BSP fittings is not inchangeable.
Differences of JIS vs BSP fittings standards as follow:
JIS fittings standard is as per Japanese industry standard such as JIS B8363.
BSP fittings is as per British standard institue BS5200 stnadards the same to ISO 8434-6 standard.
JIS B8363 standards is based on BS5200.
60 degree angle diameter
The undercut area of BSP fitings is also used as stud fittings function with bonded seal. JIS fittings is not this usage.
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