本文件规定了与ISO？中描述的可调和不可调螺柱端一起使用的公制端口的尺寸。6149？2和ISO？6149？3. 根据本文件的端口可在高达63 MPa（630 bar[1]）的工作压力下用于不可调节螺柱端和40？MPa（400？bar）用于可调螺柱端。允许的工作压力取决于端口尺寸、材料、设计、工作条件、应用等。参见ISO？6149？2和ISO？6149？3表示压力等级。 笔记？本文件的介绍给出了用于液压流体动力应用新设计的端口和螺柱端的建议。 [1]1 bar=0.1 MPA=105？Pa;1？MPa？=？1？N/mm2。

This document specifies dimensions for metric ports for use with the adjustable and non-adjustable stud ends as described in ISO？6149？2 and ISO？6149？3. Ports in accordance with this document can be used at working pressures up to 63 MPa (630 bar[1]) for non-adjustable stud ends and 40？MPa (400？bar) for adjustable stud ends. The permissible working pressure depends upon port size, materials, design, working conditions, application, etc. See ISO？6149？2 and ISO？6149？3 for pressure ratings. NOTE？The Introduction of this document gives recommendations for ports and stud ends to be used for new designs in hydraulic fluid power applications. [1] 1 bar = 0,1 MPa = 10⁵？Pa; 1？MPa？=？1？N/mm².