Metric DIN Hydraulic Fittings and Threads Chart & Dimensions

Metric DIN Threads

DIN is DEUTSCHE INDUSTRIE NORMEN (GERMAN INDUSTRIAL STANDARD)

  • Thread Form per DIN 3853, ISO 261
  • 24° Cone Seat per DIN 3861, ISO 8434-1/DIN 2353
  • O Ring Seal per DIN 3865
  • Bonded Seal and Port per DIN 3852-1
  • DKL is DICHT KEGEL LEICHT – (Metric Light Series 24° Cone)
  • DKS is DICHT KEGEL SCHWER – (Metric Heavy Series 24° Cone) 
  • DKOL is DICHT KEGEL O RING LEICHT – (Metric Light O Ring Series 24° Cone) 
  • DKOS is DICHT KEGEL O RING SCHWER  – (Metric Heavy O Ring Series 24° Cone) 
  • DKM is 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.

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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.

 

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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
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

*These DKL Light Series Female Connections can be used in place of DKM Female.
Note: in above tables, pitch is included in DASH Size.
For HOSE COUPLINGS and most ADAPTORS, pitch is not included in the DASH Size.