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Metric Hex Jam Nuts and Heavy Hex Nuts
Metric ISO Hardware Engineering Data
Inch ANSI Hardware Engineering Data
Fastener and Screw / Bolt Design, Formula & Calculations
Standard Metric Hex Jam Nuts and Heavy Hex Nuts
Metric nuts are designated as following: preferably in the sequence shown: product name, nominal diameter and thread pitch, steel property class or material identification, and protective coating, if required. (Note: It is common practice in ISO Standards to omit thread pitch from the product designation when the nut threads are the metric coarse thread series, e.g., M10 stands for M10 × 1.5).
Example: Hex nut, style 1, M10 × 1.5, ASTM A563M class 10, zinc plated
Heavy hex nut, M20 × 2.5, silicon bronze, ASTM F467, grade 651
Slotted hex nut, M20, ASTM A563M class 10.
Standard Metric Hex Jam Nuts and Heavy Hex Nuts
ANSI B18.2.4.5M and B18.2.4.6M
Table 31. American National Standard Metric Hex Jam Nuts and Heavy Hex Nuts ANSI B18.2.4.5M and B18.2.4.6M-1979 (R1998)
|
Nominal Diameter
Thread Pitch |
Width
S |
Width
E |
Thickness
M |
Bearing
Diameter Dw |
Thickness
C |
||||
|---|---|---|---|---|---|---|---|---|---|
|
Max
|
Min
|
Max
|
Min
|
Max
|
Min
|
Min
|
Max
|
Min | |
|
Metric Hex Jam Nuts
|
|||||||||
|
M5 × 0.8
|
8.00
|
7.78
|
9.24
|
8.79
|
2.70
|
2.45
|
6.9
|
…
|
… |
|
M6 × 1
|
10.00
|
9.78
|
11.55
|
11.05
|
3.20
|
2.90
|
8.9
|
…
|
… |
|
M8 × 1.25
|
13.00
|
12.73
|
15.01
|
14.38
|
4.00
|
3.70
|
11.6
|
…
|
… |
|
aM10 × 1.5
|
15.00
|
14.73
|
17.32
|
16.64
|
5.00
|
4.70
|
13.6
|
…
|
… |
|
M10 × 1.5
|
16.00
|
15.73
|
18.48
|
17.77
|
5.00
|
4.70
|
14.6
|
…
|
… |
|
M12 × 1.75
|
18.00
|
17.73
|
20.78
|
20.03
|
6.00
|
5.70
|
16.6
|
…
|
… |
|
M14 × 2
|
21.00
|
20.67
|
24.25
|
23.35
|
7.00
|
6.42
|
19.6
|
…
|
… |
|
M16 × 2
|
24.00
|
23.67
|
27.71
|
26.75
|
8.00
|
7.42
|
22.5
|
…
|
… |
|
M20 × 2.5
|
30.00
|
29.16
|
34.64
|
32.95
|
10.00
|
9.10
|
27.7
|
0.8
|
0.4 |
|
M24 × 3
|
36.00
|
35.00
|
41.57
|
39.55
|
12.00
|
10.90
|
33.2
|
0.8
|
0.4 |
|
M30 × 3.5
|
46.00
|
45.00
|
53.12
|
50.85
|
15.00
|
13.90
|
42.7
|
0.8
|
0.4 |
|
M36 × 4
|
55.00
|
53.80
|
63.51
|
60.79
|
18.00
|
16.90
|
51.1
|
0.8
|
0.4 |
|
Metric Heavy Hex Nuts
|
|||||||||
|
M12 × 1.75
|
21.00
|
20.16
|
24.25
|
22.78
|
12.3
|
11.9
|
19.2
|
0.8
|
0.4 |
|
M14 × 2
|
24.00
|
23.16
|
27.71
|
26.17
|
14.3
|
13.6
|
22.0
|
0.8
|
0.4 |
|
M16 × 2
|
27.00
|
26.16
|
31.18
|
29.56
|
17.1
|
16.4
|
24.9
|
0.8
|
0.4 |
|
M20 × 2.5
|
34.00
|
33.00
|
39.26
|
37.29
|
20.7
|
19.4
|
31.4
|
0.8
|
0.4 |
|
M22 × 2.5
|
36.00
|
35.00
|
41.57
|
39.55
|
23.6
|
22.3
|
33.3
|
0.8
|
0.4 |
|
M24 × 3
|
41.00
|
40.00
|
47.34
|
45.20
|
24.2
|
22.9
|
38.0
|
0.8
|
0.4 |
|
M27 × 3
|
46.00
|
45.00
|
53.12
|
50.85
|
27.6
|
26.3
|
42.8
|
0.8
|
0.4 |
|
M30 × 3.5
|
50.00
|
49.00
|
57.74
|
55.37
|
30.7
|
29.1
|
46.6
|
0.8
|
0.4 |
|
M36 × 4
|
60.00
|
58.80
|
69.28
|
66.44
|
36.6
|
35.0
|
55.9
|
0.8
|
0.4 |
|
M42 × 4.5
|
70.00
|
67.90
|
80.83
|
77.41
|
42.0
|
40.4
|
64.5
|
1.0
|
0.5 |
|
M48 × 5
|
80.00
|
77.60
|
92.38
|
88.46
|
48.0
|
46.4
|
73.7
|
1.0
|
0.5 |
|
M56 × 5.5
|
90.00
|
87.20
|
103.92
|
99.41
|
56.0
|
54.1
|
82.8
|
1.0
|
0.5 |
|
M64 × 6
|
100.00
|
96.80
|
115.47
|
110.35
|
64.0
|
62.1
|
92.0
|
1.0
|
0.5 |
|
M72 × 6
|
110.00
|
106.40
|
127.02
|
121.30
|
72.0
|
70.1
|
101.1
|
1.2
|
0.6 |
|
M80 × 6
|
120.00
|
116.00
|
138.56
|
132.24
|
80.0
|
78.1
|
110.2
|
1.2
|
0.6 |
|
M90 × 6
|
135.00
|
130.50
|
155.88
|
148.77
|
90.0
|
87.8
|
124.0
|
1.2
|
0.6 |
|
M100 × 6
|
150.00
|
145.00
|
173.21
|
165.30
|
100.0
|
97.8
|
137.8
|
1.2
|
0.6 |
a This size with width across flats of 15 mm is not standard. Unless specifically ordered, M10 hex jam nuts with 16 mm width across flats will be furnished.
All dimensions are in millimeters.
Related
- Minimum Prevailing Torque Values for ANSI Inch Nuts Fine and Course threads.
- Dimension and Tolerances Table for T-Slots, Bolts, and Nuts T-Slots, Bolts, and Nuts per. American National Standard T-Slots ANSI/ASME B5.1M
- Square Nut B18.2.2 Heavy Square Nuts ANSI/ASME B18.2.2
- Square and Hexagon Machine Screw Nuts Size Table ANSI B18.6.3
- Wrench Openings Table for Hex and Square Nuts per. ASME B18.2.2 Dimensional data may also be used to define 3D Printing Model nut capture geometry width.
- Tapered Shaft End and Mating Hole with Slotted Nuts Design Data Dimensions Per. SAE Standard Includes Wood Ruff key design data
- T-Nuts per. ASME B5.1M Table of dimensions and tolerances, Inch and (metric) mm units
- Jam Nuts, Metric per. ANSI B18.2.4.5M
- Torque Nuts, Metric per. ANSI B18.16.3M
- Hex Nuts Metric per. B18.2.4.1M and B18.2.4.2M
- BS EN ISO 898-6 Proof load values and Minimum Stripping Strength of nuts
- BS EN ISO 4032 Hexagon nuts style 1 – product grades A and B
- BS EN ISO 4033 Hexagon nuts style 2 – product grades A and B
- BS EN ISO 4034 Hexagon nuts style 1 – product grade C
- BS EN ISO 4035 Hexagon thin nuts chamfered – product grades A and B
- BS EN ISO 4036 Hexagon thin nuts (unchamfered) – product grade B
- Slotted Hex Nuts per. B18.2.4.4M
- Metric Hex Nuts, Styles 1 and 2 ANSI/ASME B18.2.4.1M and B18.2.4.2M
- T-Bolts and T-Nuts Dimensions per. BS 2485
- T-Nuts per. ASME B5.1M Table of dimensions and tolerances, Inch and (metric) mm units
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