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International Measuring and Identification Guide - Metric Flareless - Din 3901/3902L, 3901/3902S

Manufactured by Various

Product Group Data
Tube O.D.		Tube O.D.		Metric	Male Thread		Female Thread
Light		Heavy		Thread	O.D.		I.D.
MM	Inch	MM	Inch	Size	MM	Frac.	MM	Frac.
6	.24	--	--	M12 x 1.5	12	15/32	10.5	13/32
8	.32	6	.24	M14 x 1.5	14	9/16	12.5	1/2
10	.39	8	.32	M16 x 1.5	16	5/8	14.5	9/16
12	.47	10	.39	M18 x 1.5	18	23/32	16.5	21.32
--	--	12	.47	M20 x 1.5	20	25/32	18.5	23/32
15	.59	14	.55	M22 x 1.5	22	7/8	20.5	13/16
--	--	16	.63	M24 x 1.5	24	15/16	22.5	7/8
18	.71	--	--	M26 x 1.5	26	1 1/32	24.5	31/32
22	.87	20	.78	M30 x 2.0	30	1 3/16	28	1 1/8
28	1.10	25	.98	M36 x 2.0	36	1 13/32	34	1 11/32
--	--	30	1.18	M42 x 2.0	42	1 21/32	40	1 9/16
35	1.38	--	--	M45 x 2.0	45	1 25/32	43	1 23/32
42	1.65	38	1.50	M52 x 2.0	52	2 1/32	50	1 31/32

The female metric flareless connection also has metric straight threads (mm).
The female connection can be one of three styles:
1). Tube, nut and sleeve.
2). Globeseal
3). Globeseal with an O-Ring.
On all three styles the seal is made when the 246 seat aligns with the tube O.D. used with it.
The threads retain the connection.
Note:
Din 3901/3902L is light series.
Din 3901/3902S is heavy series.