ASTM A194 Grade 7 Nuts
ASTM A194 Grade 7 Nuts
The specification ASTM A194 Grade 7 Nuts are used in applications that demand good performance in either high temperature or high pressure environments. This specification fasteners can also be used in those applications that require high performance in both high temperature and high pressure conditions.
The Sa 194 Grade 7 Nuts specification standard covers Quenched & tempered alloy steel heavy hex nuts. These fasteners can be constructed from various alloys that could be either medium carbon based or it could be from stainless steel. The stainless steels covered under this grade are both martensitic as well as austenitic classes of stainless steel.
Specification of ASTM A194 Grade 7 Nuts
Dimensions
|
ASME B18.2.1, B18.3
|
Melt Origin
|
South America/East Europe/Japan/Korea/
|
Product Origin
|
Made in India
|
Threads Configuration
|
ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads
|
Certification
|
Dual Certified As per ASTM & ASME Codes
|
Additional Certifications
|
PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
|
Mandatory Requirements
|
Free from Mercury & Radioactive Contamination
|
Additional Requirements
|
NACE MR0103 / MR0175 / ISO 15156 Compliance
|
Standards
|
Designation
|
ASTM
|
A194 Grade 7: 410 Stainless Steel, Quenched and Tempered..
|
Dimensions of ASME SA 194 grade 7 hex nuts
Astm A194 Gr.7 Hex Nuts Dimension
* * All measurements in millimeters* *
Nominal Size or Basic Major Thread Diameter
|
F
|
G
|
H
|
Width Across Flats
|
Width Across Corners
|
Thickness
|
Basic
|
Max
|
Min
|
Max
|
Min
|
Basic
|
Max
|
Min
|
1/4
|
.2500
|
7/16
|
.438
|
.428
|
.505
|
.488
|
7/32
|
.226
|
.212
|
5/16
|
.3125
|
1/2
|
.500
|
.489
|
.577
|
.557
|
17/64
|
.273
|
.258
|
3/8
|
.3750
|
9/16
|
.562
|
.551
|
.650
|
.628
|
21/64
|
.337
|
.479
|
7/16
|
.4375
|
11/16
|
.688
|
.675
|
.794
|
.768
|
3/8
|
.385
|
.365
|
1/2
|
.5000
|
3/4
|
.750
|
.736
|
.866
|
.840
|
7/16
|
.448
|
.427
|
9/16
|
.5625
|
7/8
|
.875
|
.861
|
1.010
|
.982
|
31/64
|
.496
|
.473
|
5/8
|
.6250
|
15/16
|
.938
|
.922
|
1.083
|
1.051
|
35/64
|
.559
|
.535
|
3/4
|
.7500
|
1-1/8
|
1.125
|
1.088
|
1.299
|
1.240
|
41/64
|
.665
|
.617
|
7/8
|
.8750
|
1-5/16
|
1.312
|
1.269
|
1.516
|
1.447
|
3/4
|
.776
|
.724
|
1
|
1.0000
|
1-1/2
|
1.500
|
1.450
|
1.732
|
1.653
|
55/64
|
.887
|
.831
|
1-1/8
|
1.1250
|
1-11/16
|
1.688
|
1.631
|
1.949
|
1.859
|
31/32
|
.999
|
.939
|
1-3/8
|
1.3750
|
2-1/16
|
2.062
|
1.994
|
2.382
|
2.273
|
1-11/64
|
1.206
|
1.138
|
1-1/2
|
1.500
|
2-1/4
|
2.250
|
2.175
|
2.598
|
2.480
|
1-9/32
|
1.ASTM A194 GR. 8
|
1.245
|
1-5/8
|
1.6250
|
2-7/16
|
2.438
|
2.356
|
2.815
|
2.686
|
1-25/64
|
1.429
|
1.353
|
1-3/4
|
1.7500
|
2-5/8
|
2.625
|
2.538
|
3.031
|
2.893
|
1-1/2
|
1.540
|
1.460
|
2
|
2.0000
|
3
|
3.000
|
2.900
|
3.464
|
3.306
|
1-23/32
|
1.763
|
1.675
|
2-1/4
|
2.2500
|
3-3/8
|
3.375
|
3.263
|
3.897
|
3.719
|
1-15/16
|
1.986
|
1.890
|
2-1/2
|
2.5000
|
3-3/4
|
3.750
|
3.625
|
4.330
|
4.133
|
2-5/32
|
2.209
|
2.105
|
2-3/4
|
2.7500
|
4-1/8
|
4.125
|
3.988
|
4.763
|
4.546
|
2-3/8
|
2.431
|
2.319
|
Dimensions Of ASTM A194 Grade 7 Heavy Hex Nut
Nominal Size or Basic Major Thread Diameter
|
F
|
G
|
H
|
Width Across Flats
|
Width Across Corners
|
Thickness
|
Basic
|
Max
|
Min
|
Max
|
Min
|
Basic
|
Max
|
Min
|
1/4
|
.2500
|
1/2
|
.500
|
.488
|
.577
|
.556
|
15/64
|
.250
|
.218
|
5/16
|
.3125
|
9/16
|
.562
|
.546
|
.650
|
.622
|
19/64
|
.314
|
.280
|
3/8
|
.3750
|
11/16
|
.688
|
.669
|
.794
|
.763
|
23/64
|
.377
|
.341
|
7/16
|
.4375
|
3/4
|
.750
|
.728
|
.866
|
.830
|
27/64
|
.441
|
.403
|
1/2
|
.5000
|
7/8
|
.875
|
.850
|
1.010
|
.969
|
31/64
|
.504
|
.464
|
9/16
|
.5625
|
15/16
|
.938
|
.909
|
1.083
|
1.037
|
35/64
|
.568
|
.526
|
5/8
|
.6250
|
1-1/16
|
1.062
|
1.031
|
1.227
|
1.175
|
39/64
|
.631
|
.587
|
3/4
|
.7500
|
1-1/4
|
1.250
|
1.212
|
1.443
|
1.382
|
47/64
|
.758
|
.710
|
7/8
|
.8750
|
1-7/16
|
1.438
|
1.394
|
1.660
|
1.589
|
55/64
|
.885
|
.833
|
1
|
1.0000
|
1-5/8
|
1.325
|
1.575
|
1.876
|
1.796
|
63/64
|
1.012
|
.956
|
1-1/8
|
1.1250
|
1-13/16
|
1.812
|
1.756
|
2.093
|
2.002
|
1-7/64
|
1.139
|
1.079
|
1-1/4
|
1.2500
|
2
|
2.000
|
1.938
|
2.309
|
2.209
|
1-7/32
|
1.251
|
1.187
|
1-3/8
|
1.3750
|
2-3/16
|
2.188
|
2.119
|
2.526
|
2.416
|
1-11/32
|
1.378
|
1.460
|
1-1/2
|
1.5000
|
2-3/8
|
2.375
|
2.300
|
2.742
|
2.622
|
1-15/32
|
1.505
|
1.433
|
1-5/8
|
1.6250
|
2-9/16
|
2.562
|
2.481
|
2.959
|
2.828
|
1-19/32
|
1.632
|
1.556
|
1-3/4
|
1.7500
|
2-3/4
|
2.750
|
2.662
|
3.175
|
3.035
|
1-23/32
|
1.759
|
1.679
|
2
|
2.0000
|
3-1/8
|
3.125
|
3.025
|
3.608
|
3.449
|
1-31/32
|
2.013
|
1.925
|
2-1/4
|
2.2500
|
3-1/2
|
3.500
|
3.388
|
4.041
|
3.862
|
2-13/64
|
2.251
|
2.155
|
2-1/2
|
2.5000
|
3-7/8
|
3.875
|
3.750
|
4.474
|
4.275
|
2-29/64
|
2.505
|
2.401
|
2-3/4
|
2.7500
|
4-1/4
|
4.250
|
4.112
|
4.907
|
4.688
|
2-45/64
|
2.759
|
2.647
|
3
|
3.0000
|
4-5/8
|
4.625
|
4.475
|
5.340
|
5.102
|
2-61/64
|
3.013
|
2.893
|
3-1/4
|
3.2500
|
5
|
5.000
|
4.838
|
5.774
|
5.515
|
3-3/16
|
3.252
|
3.124
|
3-1/2
|
3.5000
|
5-3/8
|
5.375
|
5.200
|
6.207
|
5.928
|
3-7/16
|
3.506
|
3.370
|
3-3/4
|
3.7500
|
5-3/4
|
5.750
|
5.562
|
6.640
|
6.341
|
3-11/16
|
3.670
|
3.616
|
4
|
4.0000
|
6-1/8
|
6.125
|
5.925
|
7.073
|
6.755
|
3-15/16
|
4.014
|
3.862
|
Size Chart of ASTM A194 Gr 7 Nut
Nut Size (mm)
|
Diameter* (mm)
|
Height (mm)
|
Hex Nut
|
Jam Nut
|
Nylock Nut
|
2
|
4
|
1.6
|
1.2
|
-
|
2.5
|
5
|
2
|
1.6
|
-
|
3
|
5.5
|
2.4
|
1.8
|
4
|
4
|
7
|
3.2
|
2.2
|
5
|
5
|
8
|
4
|
2.7
|
5
|
6
|
10
|
5
|
3.2
|
6
|
7
|
11
|
5.5
|
3.5
|
-
|
8
|
13
|
6.5
|
4
|
8
|
10
|
17
|
8
|
5
|
10
|
12
|
19
|
10
|
6
|
12
|
14
|
22
|
11
|
7
|
14
|
16
|
24
|
13
|
8
|
16
|
18
|
27
|
15
|
9
|
18.5
|
20
|
30
|
16
|
10
|
20
|
* This is the diameter across the flats. It is also the size of wrench to use.
|