DIN 3865 Hydraulic Fittings Used In ISO 8434 ISO 12151 DIN 20078 Standard

Views: 547     Author: Site Editor     Publish Time: 2022-12-22      Origin: Site

DIN 3865 standard pdf specifies nipple 24 degree cone with o-ring connection, for compression tube fittings according to DIN EN ISO 8434-1 and ISO 8434-4, and ISO 12151 part 2 and DIN 20078-8, DIN 20078-9 hose fittings, it is used with metric female nuts, one is tube union nut(DIN 3870 compression nut), another one is steel wire-through nut also called “DKO Swivel”.  

DIN 3865 Dimensions and designation

Fittings, nuts as per DIN EN ISO 8434-1 standards, interface at manufacturer’s discretion

Type A design with Weld-on Nipple

DIN3865 Type A design with Weld-on Nipple

Type B design for use with hose fittings and swivel adapters.

DIN 3865 Type B design for use with hose fittings and swivel adapters

Dimensions of DIN 3865 fittings

Dimensions of DIN 3865 fittings


For type A, 24 degree cone weld-on nipple should be weldable steel, for type B, 24 degree compression tube fittings should be C35 or C45 steel. O-ring shall be made of NBR with 90 IRHD, other materials being the subject of agreement.


The 24° sealing cones with O-ring listed in this standard are used for connection to

a) L and S series cutting ring connection according to DIN EN ISO 8434-1 and ISO 8434-4, Our Part No series of 2C, 2C9, CC, BC, 3C etc. 

b) Corresponding hose fittings form D (series L) according to DIN 20078-4 or form E (series S) according to DIN 20078-5, Our part No series of 20511 20411 20591

For hose fittings with sealing cone form B, the requirements, assembly instructions and test specified in DIN 20078-1, the dimensions in DIN 20078-8 (L series) or DIN 20078-9 (S series).

Fitsch is your professional manufactuer of Metric Female Swivel with o-ring 24 degree cone connectors, DIN Swivel Fittings  DIN Hose Fittings with Swivel types.


Fitsch has been in the business of hydraulic tube fittings, hydraulic adapters, hose fittings, hydraulic flanges, industrial fittings and hydraulic accessories for over 20 years, offering all our customer competitive products and supplies from our local industry manufacturers union.    



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