JB/T 2774-1992 PN16.0～32.0MPa Step-end studs and screw hole dimensions

This standard specifies the type, size, and technical requirements of step-end studs and screw holes. This standard applies to the dimensions of step-end studs and screw holes with a nominal pressure of PN16.0~32.0MPa. JB/T 2774-1992 PN16.0～32.0MPa Step-end studs and screw hole dimensions JB/T2774-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
PN16.0~32.0 MPa
Step-end studs and screw hole dimensions
1 Subject content and scope of application
This standard specifies the type, size, technical requirements of step-end studs and screw holes. This standard applies to the size of step-end studs and screw holes with a nominal pressure of PN16.0~32.0MPa. 2
Referenced standards
Ordinary thread basic size
GI3197 Ordinary thread tolerance and fit
JB/T2773PN16.0~32.0MPa studs 3 Structural type and size
3.1 The type of step-end studs shall be as specified in Figure 1. CX15°bZxz.net
Marking example
Coarse pitch ordinary thread, 27mm diameter, 200mm long step-end stud: step-end stud M27×200JB/T 27743.2 The dimensions of step-end studs shall be in accordance with the provisions of Table 1. Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 20, 1992, JB/T 2774 92
Replaced J2771#9
Implemented from January 1, 1993
JB/T2774—-92
3.3 The length L of the step-end stud is 60~350mm. 3.4
The dimensions of the screw hole shall be in accordance with the provisions of Figure 2 and Table 2. 120
4 Technical requirements
JB/T 2774—92
4.1 The basic dimensions of the screw thread shall comply with the provisions of GB196, and the thread tolerance shall comply with the provisions of GB397. Other technical requirements shall comply with the provisions of JB/T2773. 4.2
Additional remarks:
This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery and Electronics Industry. The Hefei General Machinery Research Institute of the Ministry of Machinery and Electronics Industry was responsible for drafting this standard. The main drafters of this standard are Huang Mingya and Wang Xiaogou. 109
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