This standard specifies the type, size and technical requirements for all-metal spring ferrule hexagonal lock nuts with thread specifications M8~M48. JB/T 6545-1993 All-metal spring hoop hexagonal locking nut JB/T6545-1993 Standard download and decompression password: www.bzxz.net

J13 | 03 Released
Ministry of Machinery Industry of the People's Republic of China
Released
Implemented on 1994-07-01
Machinery Industry Standard of the People's Republic of China
All Metal Spring Yellow Hoop hexagonal lock nut
1 Subject content and scope of application
JB/T 6545-93
This standard specifies the thread specifications M8 ~ M48 all-metal spring hexagonal lock nut ( (hereinafter referred to as the lock nut) type, size and technical requirements,
This standard is applicable to performance levels of 5, 8.10, 12, A level (for D≤M16), B level (for D> M16) lock nut. 2 Reference standards
GB90
GB196
GB197
GB3098.2
GB3103.1
GB5267
GB5779. 2
Fastener acceptance inspection, marking and packaging
Basic dimensions of ordinary threads (diameter 1~600mm) Ordinary thread tolerances and fits (diameter 1~355mm) Mechanical properties of fasteners Nuts||tt ||Fastener Tolerances Bolts, Screws and Nuts
Threaded Fastener Plating
Fastener Surface Defects
Nuts
General Requirements
Type, size and marking
3
The type and size of the lock nut shall comply with the figure and Table 1. 3.1
S3
Thread specification D
d .
d.
max
min
min
min
M8
8. 75||tt| |8
11. 6
14.38
Approved by the Ministry of Machinery Industry on 1993-09-03
M10
10.8
10|| tt||14. 6
17.77
M12
13
12
16. 6
20.03
90 *~120
Table 1
(M14)
15.1
14
19.6
23.35
M16|| tt||17.3
16
22.5
26.75
(M18)
19.5
18
24.8|| tt||29.56
M20
21.6
20
27.7
32.95
mm
(M22)|| tt||23.7
22
31.4
37.29
1994-07-01 Implementation
Thread specification
D||tt| |max
min
m
min
max
min
Thread specifications
d
d.
A
S
D
max
min
min
min
max
min
min
max
min
M8
9
8.14
4.5|| tt||13
12.73
M24
25.9
24
33. 2
39.55
23.9|| tt||22.6
13.2
36
35
M10
11
9.94
5.5||tt| |16
15.73
(M27)
29.1
27
38
45. 2
27|| tt | | 25.7 | | tt | | 13.7 | tt||JB/T 6545--93
Continued Table 1
M12
13
12.57
6. 6
18
17.73
M30
32.4
30
42.7
50.85
30
27.3|| tt||16.5
46
45
(M14)
14.1
13. 4
7.7
21
20. 67
(M33)
35.6
33
46.6
55.37
33||tt| |31.7
19
50
49
M16
16. 4
15. 7
8.8|| tt||24
23.67
M36
38. 9
36
51.1
60.79
36|| tt||33.1
19.8
55
53.8
(M18)
18
17.3
9.2|| tt||27
26.16
(M39)
42.1
39
55.9
66. 44
39
37.4
22
60
58.8
Thread specification D=M12, performance level 8, processed without table, Class A lock The purple nut is marked as: Nut M12JB/T6545-93
4 Technical requirements
Technical requirements should comply with Table 2.
Table 2
Material
Screw
Grain
Mechanical properties
Material
Effective
Force
public
difference
common
standard
etc
standard
moment
label|| tt||quasi
grade
quasi
product grade
standard
surface
processing
table country defects| |tt||Acceptance and packaging
Accurate
Note: The effective torque refers to the locking torque of the nut feeding part. 2
Steel
6H
GB196,GB197
5.8, 10, 12 (Grade 12 D≤M16)
GB 3098. 2||tt ||According to the provisions of Table 3
M20
20.3
19
11
30
29.16
M42|| tt||45. 4
42
60. 6
72.02
42
39
25
65
63.8
A is used for D≤M16.B is used for D>M16
GB3103.1
(1) without processing
(2 ) Galvanizing (GB5267)
(3) Oxidation
GB5779. 2
GB90
mm
(M22)
22
20.7
12.1
34
33
M48
51.8
48
69. 4
82.6
48
45
27
75
73.1
The effective torque of the locking nut should comply with the requirements in Table 3. Thread specification D
mm
Performance
Grade
5.8
Performance
Grade
10.12
Performance
Level
5, 8
Performance
Level
10, 12
First time screwing in
The first time to screw out
The fifth time to screw out
The first time to screw in
The first time to screw out
The fifth time to screw out
Vibration pattern specification D
mm
First screw-in
First time out
Fifth time screw-out
First screw-in| |tt||First time out
Fifth time out
Additional notes:
max
min
min
max
min
min
max
min
min
max
min
min| |tt||M8
6. 0
0.85
0.60
8.0
1.15
0.80
M24| |tt||80
11.5
8.0
106
15
10.5
JB/T 654593
Table 3
M10
10.5
1.5
1.0
14
2.0
1.4
M27| |tt||94
13.5
10
123
17
12
M12
15.5||tt ||2. 3
1.6
21
3.1
2.1
M30
108
16||tt ||12
140
19
14
M14
24
3.3
2. 3||tt ||31
4.4
3. 0
M33
122
18
14
160||tt ||21.5
15.5
This standard is proposed and managed by the Xi'an Heavy Machinery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Luoyang Mining Machinery Factory. The main drafter of this standard is Wang Xuetong.
M16
32
4. 5
3. 0
42
6.0
4.2||tt| |M36
136
21
16
180
24
17.5
M18
42
6.0
4. 2
56
8.0
5.5
M39
150
23
18
200
26.5
19.5
M20
54
7.5
5.3|| tt||72
10. 5
7.0
M42
176
26
20
220|| tt||29
22
N·m
M22
68
9.5
6.5
90|| tt||13
9.0
M48
225
32
25
292wwW.bzxz.Net
35||tt| |27
3
3
72
10. 5
7.0
M42
176
26
20
220
29
22| |tt||N·m
M22
68
9.5
6.5
90
13
9.0| |tt||M48
225
32
25
292
35
27
3||tt ||3
72
10. 5
7.0
M42
176
26
20
220
29
22| |tt||N·m
M22
68
9.5
6.5
90
13
9.0| |tt||M48
225
32
25
292
35
27
3||tt ||
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