This standard specifies the thread type and size of the verticality inspection gauge for testing the verticality between the nut bearing surface and the thread axis. This standard applies to item 14 in Table 3 of ZB J13002.1. JB/T 7384.11-1994 Fastener nut thread verticality gauge JB/T7384.11-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7384.1~7384.18-94
Special Inspection Fixtures for Fasteners
Published on 1994-07-26
Ministry of Machinery Industry of the People's Republic of China
Implemented on 1995-07-01
Mechanical Industry Standard of the People's Republic of China
Fasteners
Vertical Gauge for Nut Threads
Subject Content and Scope of Application
JB/T7384.1194
This standard specifies the thread type and size of the verticality inspection gauge (referred to as the vertical gauge) for detecting the verticality between the nut bearing surface and the thread axis. This standard applies to item 14 in Table 3 of ZBJ13002.1. 2 Reference standards
GB3934
Ordinary thread gauge
ZBJ13002.1
Fastener test method
The thread size code of heavy straight gauge is shown in Table 1.
Dimensions and geometrical accuracy of bolts, screws, studs and nuts Table 1
Major diameter of bolts fitting with nuts
Pitch diameter of bolts fitting with nuts
Upper deviation of threads fitting with nuts
Pitch diameter tolerance of vertical gauge threads
Distance between the centre line of the pitch diameter tolerance zone of the vertical gauge and the ideal limit of co-closedness Pitch tolerance of threads Table 5 of GB3934: Thread profile shall be in accordance with Figure 3 of GB3934, and the values ​​of its relevant elements shall be in accordance with Table 6 of GB3934: Half angle 3.2
Tolerance shall be in accordance with the complete end thread profile specified in Table 4 of GB3934, 3.3
The dimensions of major diameter and pitch diameter of vertical gauge threads and the calculation formulas for the limit deviations shall be in accordance with Table 2. Table 2
Basic size
d+es+Tr
Limit deviation
Basic size
d,+es+Tp
Limit deviation
The tolerance of the middle diameter of the vertical gauge and the wear limit deviation are as specified in Table 3. Approved by the Ministry of Machinery Industry on July 26, 1994
Wear limit deviation
Implementation on July 1, 1995
Thread specification d
>M5~M12
>M12~M45
>M45~M64www.bzxz.net
JB/T 7384.11-94
Screw middle diameter tolerance Tl
Indicate the limit deviation
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