Metric DIN Threads

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DIN is Deutsche Industrie Normen (German Industrial Standard)

Metric DIN Threads

DIN DEUTSCHE INDUSTRIES NORMEN Thread Form Per DIN 3853, ISO 261
DKL DICHT KEGEL LEICHT Metric Light Series 24° Cone
DKS DICHT KEGEL SCHWER Metric Heavy Series 24° Cone
DKOL DICHT KEGEL O RING LEICHT Metric Light O Ring Series 24° Cone
DKOS DICHT KEGEL O RING SCHWER Metric Heavy O Ring Series 24° Cone
DKM DICHT KEGEL METRIC Metric 60° Cone
This DIN connection comes in a Light Series (DKL/DKOL) and a Heavy Series (DKS/DKOS). Some thread sizes in each series are the same, but the Tube OD of the Heavy Series is smaller and has a thicker tube wall. Because the tube and sealing cone are different sizes, Light and Heavy Series are NOT interchangeable.

The DIN male 24° internal cone seat will seal with flareless female swivel fittings. These female fittings use either a spherical nose (DKL/DKS) or an O Ring seal (DKOL/DKOS) located on their outward facing 24° cone. Female DKL sizes up to and including M26 have a universal 24°/60° cone and can be used in place of female DKM fittings with 60° cone.

The same male also mates with the DIN system Metric Tube, Tube Nut and Compression Olive (Cutting Ring). Tightening of the female nut compresses the olive causing it to cut into the tube, thereby forming a seal between the tube, olive and 24° male cone.

The same male used with a metal Bonded Seal will mate with a DIN 3852-1 metric threaded port with spotface.

Metric Din Threads 01
DKM 60° CONE SEAT

The DIN male 60° internal cone seat will mate with DKL/DKM female universal 24°/60° cone fittings up to and including size M26 and DKM female 60° cone fittings from size M30 up.

Metric Din Threads 02

Metric DIN Threads Dimensions

MALE THREAD OD & PITCH FEMALE THREAD ID LIGHT SERIES – DKL/DKOL HEAVY SERIES – DKS/DKOS
DASH SIZE TUBE OD D1 DIA D2 DIA DASH SIZE TUBE OD D1 DIA D2 DIA
mm mm mm mm mm mm mm mm
M12 x 1,5 10,5 -1215* 6 7,5 6,3
M14 x 1,5 12,5 -1415* 8 9,5 8,2 -1415 6 7,5 6,3
M16 x 1,5 14,5 -1615* 10 11,5 10,2 -1615 8 9,5 7,9
M18 x 1,5 16,5 -1815* 12 14,0 12,2 -1815 10 12,0 10,0
M20 x 1,5 18,5 -2015 12 14,0 12,0
M20 x 1,5 18,5 -2015 12 14,0 12,0
M22 x 1,5 20,5 -2215* 15 17,0 15,2 -2215 14 16,0 14,2
M24 x 1,5 22,5 -2415 16 18,0 15,8
M26 x 1,5 24,5 -2615* 18 20,0 18,2
M30 x 2,0 28,0 -3020 22 24,5 22,2 -3020 20 22,5 19,8
M36 x 2,0 34,0 -3620 28 30,5 28,2 -3620 25 27,5 24,5
M42 x 2,0 40,0 -4220 30 33,0 30,0
M45 x 2,0 43,0 -4520 35 38,0 35,4
M52 x 2,0 50,0 -5220 42 45,0 42,4 -5220 38 41,0 36,8