scope:

This part of IS0 6149 specifies dimensions, perform-ance requirements and test procedures for metric adjustable and non-adjustable light-duty (L series) stud ends and O-rings.

Stud ends in accordance with this part of IS0 6149 may be used at working pressures up to 40 MPa (400 bar¹⁾) for non-adjustable stud ends, and 31,5 MPa (315 bar) for adjustable stud ends. The permissible working pressure depends upon the stud end size, materials, design, working conditions, application, etc.

For threaded ports and stud ends specified in new designs in hydraulic fluid power applications, only IS0 6149 is to be used. Threaded ports and stud ends in accordance with IS0 1179 and IS0 11926 are not to be used for new designs in hydraulic fluid power applications.

Conformance to the dimensional information in this part of IS0 6149 does not guarantee rated performance. Each manufacturer should perform testing according to the specification contained in this part of IS0 6149 to assure that components comply with the performance ratings.

NOTE 1  A significant number of tests have been conducted to confirm the performance requirements of connection ends made from carbon steel. This part of IS0 6149 applies to fittings detailed in IS0 8434-2.

¹⁾ 1 bar = 0,l MPa = IO⁵ Pa; 1 MPa = 1 N/mm²