Identification sheet
Two connections with the same 30 degree seat and completely different threads: one BSPP, one metric. Neither will start on the other.
16 rows2 sectionsLandscape
| Size | Thread | TPI / pitch | Basic major Ø | Measured across crests | Tube OD | Working pressure |
|---|---|---|---|---|---|---|
| JIS 30 degree flare on a BSPP thread (JIS B 0202 thread form) | ||||||
| -04 JIS 30 (G 1/4) | G 1/4 (19 TPI, 55 degree) | 19 TPI (1.337 mm pitch) | 13.16 mm / 0.518 in | 13.21 mm to 13.5 mm | Not published | Not published |
| -06 JIS 30 (G 3/8) | G 3/8 (19 TPI, 55 degree) | 19 TPI (1.337 mm pitch) | 16.66 mm / 0.656 in | 16.51 mm to 16.7 mm | Not published | Not published |
| -08 JIS 30 (G 1/2) | G 1/2 (14 TPI, 55 degree) | 14 TPI (1.814 mm pitch) | 20.95 mm / 0.825 in | 20.5 mm to 20.83 mm | Not published | Not published |
| -10 JIS 30 (G 5/8) | G 5/8 (14 TPI, 55 degree) | 14 TPI (1.814 mm pitch) | 22.91 mm / 0.902 in | 22.35 mm to 23.1 mm | Not published | Not published |
| -12 JIS 30 (G 3/4) | G 3/4 (14 TPI, 55 degree) | 14 TPI (1.814 mm pitch) | 26.44 mm / 1.041 in | 26.3 mm to 26.42 mm | Not published | Not published |
| -16 JIS 30 (G 1) | G 1 (11 TPI, 55 degree) | 11 TPI (2.309 mm pitch) | 33.25 mm / 1.309 in | 33.02 mm to 33.4 mm | Not published | Not published |
All 16 rows across 2 sections, black on white, column headers repeating at the top of every page, banded rows, no row split across a page break, landscape. Print it or save it as a PDF.
Every figure on this sheet is free to read on the size page it came from and on its standard index. What Premium buys is the sheet.
Free to read
Nothing on this sheet is behind the paywall as information. Each standard below has a free index carrying the same table, and each size has its own page with the measured span, the seat, what it mates with and the sources behind every figure.
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Every value on this page was checked against 3 independent published sources: