Identification sheet

Metric DIN 2353 / ISO 8434-1, light and heavy series

Both series of the 24 degree cone connection, with the tube each thread serves. Seven threads carry one tube size in the light series and a different one in the heavy series, and those rows are the ones that go wrong.

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Metric DIN 2353 / ISO 8434-1, light and heavy series

20 rows. Print landscape.

Metric DIN 2353 / ISO 8434-1, light and heavy series. Both series of the 24 degree cone connection, with the tube each thread serves. Seven threads carry one tube size in the light series and a different one in the heavy series, and those rows are the ones that go wrong.
Size	Thread	TPI / pitch	Basic major Ø	Measured across crests	Tube OD	Working pressure
Metric 24 degree cone, DIN 2353 / ISO 8434-1, light (L) and heavy (S) series
6L (M12 x 1.5)	M12 x 1.5	1.5 mm pitch	12 mm / 0.472 in	Not published	6 mm	250 to 315 bar (3,626 to 4,569 psi)
8L (M14 x 1.5)	M14 x 1.5	1.5 mm pitch	14 mm / 0.551 in	Not published	8 mm	250 to 315 bar (3,626 to 4,569 psi)
10L (M16 x 1.5)	M16 x 1.5	1.5 mm pitch	16 mm / 0.63 in	Not published	10 mm	250 to 315 bar (3,626 to 4,569 psi)
12L (M18 x 1.5)	M18 x 1.5	1.5 mm pitch	18 mm / 0.709 in	Not published	12 mm	250 to 315 bar (3,626 to 4,569 psi)
15L (M22 x 1.5)	M22 x 1.5	1.5 mm pitch	22 mm / 0.866 in	Not published	15 mm	250 to 315 bar (3,626 to 4,569 psi)
18L (M26 x 1.5)	M26 x 1.5	1.5 mm pitch	26 mm / 1.024 in	Not published	18 mm	160 to 315 bar (2,321 to 4,569 psi)
22L (M30 x 2.0)	M30 x 2.0	2 mm pitch	30 mm / 1.181 in	Not published	22 mm	160 bar (2,321 psi)
28L (M36 x 2.0)	M36 x 2.0	2 mm pitch	36 mm / 1.417 in	Not published	28 mm	100 to 160 bar (1,450 to 2,321 psi)
35L (M45 x 2.0)	M45 x 2.0	2 mm pitch	45 mm / 1.772 in	Not published	35 mm	100 to 160 bar (1,450 to 2,321 psi)
42L (M52 x 2.0)	M52 x 2.0	2 mm pitch	52 mm / 2.047 in	Not published	42 mm	100 to 160 bar (1,450 to 2,321 psi)
6S (M14 x 1.5)	M14 x 1.5	1.5 mm pitch	14 mm / 0.551 in	Not published	6 mm	630 bar (9,137 psi)
8S (M16 x 1.5)	M16 x 1.5	1.5 mm pitch	16 mm / 0.63 in	Not published	8 mm	630 bar (9,137 psi)
10S (M18 x 1.5)	M18 x 1.5	1.5 mm pitch	18 mm / 0.709 in	Not published	10 mm	630 bar (9,137 psi)
12S (M20 x 1.5)	M20 x 1.5	1.5 mm pitch	20 mm / 0.787 in	Not published	12 mm	630 bar (9,137 psi)
14S (M22 x 1.5)	M22 x 1.5	1.5 mm pitch	22 mm / 0.866 in	Not published	14 mm	630 bar (9,137 psi)
16S (M24 x 1.5)	M24 x 1.5	1.5 mm pitch	24 mm / 0.945 in	Not published	16 mm	400 bar (5,802 psi)
20S (M30 x 2.0)	M30 x 2.0	2 mm pitch	30 mm / 1.181 in	Not published	20 mm	400 bar (5,802 psi)
25S (M36 x 2.0)	M36 x 2.0	2 mm pitch	36 mm / 1.417 in	Not published	25 mm	400 bar (5,802 psi)
30S (M42 x 2.0)	M42 x 2.0	2 mm pitch	42 mm / 1.654 in	Not published	30 mm	250 to 400 bar (3,626 to 5,802 psi)
38S (M52 x 2.0)	M52 x 2.0	2 mm pitch	52 mm / 2.047 in	Not published	38 mm	250 to 315 bar (3,626 to 4,569 psi)

Sources: Hydraulic coupling identification chart E2/50101 (Gates); Fluid Ports and Connectors Identification Guide (McGill Hose & Coupling); How to identify 24 degree tube fittings, component compatibility chart (Adaptall); Thread identification: BSP, JIC, ORFS and metric tables (Apex Fluid Power); High pressure pipe connectors: DIN 2353 working pressure table (Tubes International).

Reference aid for identification and ordering, not a substitute for the manufacturer specification. Pressure ratings apply only under the conditions printed beside them. Verify against the maker's catalogue before a system is charged.

Free to read

Every figure on this sheet, on its own page

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.

Metric DIN 24 degree20 sizes, freeISO 8434-1, DIN 2353

More sheets

Other identification charts

SAE inch fittings: JIC 37, ORB, ORFS and SAE 4542 rows Pipe threads: NPT, BSPP and BSPT32 rows Japanese fittings: JIS 30 degree and Komatsu 30 degree16 rows Seat and thread identification: all ten standards10 rows Published working pressures, with the conditions they apply under61 rows

Where these figures come from

Every value on this page was checked against 5 independent published sources:

Hydraulic coupling identification chart E2/50101 - Gates, Gates Europe, 2004 (manufacturer, read 2026-08-27)
Fluid Ports and Connectors Identification Guide - McGill Hose & Coupling, SAE J512, J514, J1453, J1926-1, ISO 228, ISO 7, DIN 2353, JIS (distributor, read 2026-08-27)
How to identify 24 degree tube fittings, component compatibility chart - Adaptall, DIN 2353, ISO 8434-1 (manufacturer, read 2026-08-27)
Thread identification: BSP, JIC, ORFS and metric tables - Apex Fluid Power, ISO 12151-2, ISO 8434-1 (distributor, read 2026-08-27)
High pressure pipe connectors: DIN 2353 working pressure table - Tubes International, DIN 2353, PN-ISO 8434-1 (distributor, read 2026-08-27)