JB/T 8004.1-1999 This standard is a revision of JB/T 8004.1-95 "Handled hexagon nuts for machine tool fixture parts and components". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard specifies shouldered hexagon nuts with ordinary thread specifications of M5 to M48 and fine thread specifications of M8×M48×1.5. This standard was first issued in 1981 as GB 2148-80, first revised to GB/T 2148-91 on April 30, 1991, and adjusted to JB/T 8004.1-95 in April 1996. JB/T 8004.1-1999 Shouldered hexagon nuts for machine tool fixture parts and components JB/T8004.1-1999 Standard download decompression password: www.bzxz.net

ICS 25. 080. 01
Mechanical Industry Standard of the People's Republic of China
The parts and units of jigs and fixtures1999-08-06Promulgated
State Machinery Industry Bureau
Implementation on 2000-01-01
Mechanical Industry Standard of the People's Republic of China
Parts and components of jigs and fixtures
The parts and units of jigs and fixturesHexagon nut with shoulder
JB/T 8004.11999
Replaces JB/T8004.1—1995
This standard specifies the hexagonal nuts with shoulder with ordinary thread specifications of M5~M48 and fine thread specifications of M8×1-M48×1.5. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T699—1988
Technical conditions for high-quality carbon structural steel
GB/T1184--1996 Shape and position tolerances without tolerance values ​​JB/T8044—1999 Technical requirements for machine tool fixture parts and components 3 Dimensions
The dimensions are shown in the following figure and table.
Approved by the State Bureau of Machinery Industry on August 6, 1999, and implemented on January 1, 2000
Ordinary thread
Fine pitch thread
M12×1.25
M16×1.5
M36×1.5
4 Technical conditions
Material: 45 steel as per GB/T699.
4.2 Heat treatment: 35~40 HRC. bzxZ.net
JB/T8004.1-1999
Basic dimensions
Limit difference
4.3 The verticality of the support surface of the fine pitch nut to the thread axis shall be in accordance with the 9th grade tolerance specified in Appendix B Table B3 of GB/T1184-1996. 4.4 Other technical conditions shall be in accordance with JB/T8044. 5 Marking
5.1 Marking example:
d-M16 shouldered hexagonal nut:
Nut M16JB/T8004.1
d-M16×1.5 shouldered hexagonal nut:
Nut M16×1.5JB/T8004.1—1999
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