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Same specifications, different dimensions for other parts.

Unit:mm/inch

Coupling Nuts

DIN 8912 (NS4) - 1990

Display drawing:

德标DIN 8912 (NS4) - 1990 DIN8912 8912DIN Coupling Nuts

Tube outer diameter

6

6

8

10

10

12

12

15

Series
d₂
d₃		(mm)	min=nominal size
			max
b		(mm)	min
L₁		(mm)
L₂		(mm)
SW		(mm)

A	C	A	A	C	C	R	C
7/16-20UNF-2B	5/8-18UNF-2B	5/8-18UNF-2B	5/8-18UNF-2B	3/4-16UNF-2B	3/4-16UNF-2B	7/8-14UNF-2B	7/8-14UNF-2B
6.5	6.5	8.2	10.2	10.2	12.2	12.2	15.2
6.59	6.59	8.29	10.31	10.31	12.31	12.31	15.31
7	8	8	8	9	9	10	10
15	18	18	18	20	20	21	21
9.5	11	11	11	12	12	13	13
16	24	24	24	27	27	30	30

Similar Standards

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3		[DIN] DIN 3871 - 1995	Non-soldering and Soldering Compression Couplings - Socket Unions
4		[DIN] DIN 71412 - 1987	Lubricating nipples; cone type
5		[JIS] JIS B 8607 (Class 2) - 2020	Flare nut, Class 2
6		[JIS] JIS B 8607 (Class 1) - 2020	Flare nut, Class 1
7		[GB] GB 3759 - 1983	Bite type tube fittings--Nuts
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10		[GOST] GOST 19853 (Type 2) - 1974	Lubricating plugs - Type 2
11		[GOST] GOST 19853 (Type 3) - 1974	Lubricating plugs - Type 3