Dimensions of Underhead Fillets for Socket Head Cap Screws
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||||||||
Nominal Screw Size
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N
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F
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F
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R
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D
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|||
Thread to Head Screw
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Fillet Juncture Diameter at Bearing Surface
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Fillet Length
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Juncture Radius
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Full Body Unthreaded Length Body Diameter
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Min
|
Max
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Min
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Max
|
Min
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Max
|
Min
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0
|
0.0600
|
0.051
|
0.074
|
0.062
|
0.012
|
0.002
|
0.0600
|
0.0560
|
1
|
0.0730
|
0.061
|
0.087
|
0.075
|
0.012
|
0.003
|
0.0730
|
0.0695
|
2
|
0.0860
|
0.073
|
0.102
|
0.090
|
0.014
|
0.003
|
0.0860
|
0.0822
|
3
|
0.0990
|
0.084
|
0.115
|
0.102
|
0.014
|
0.004
|
0.0990
|
0.0949
|
4
|
0.1120
|
0.094
|
0.130
|
0.117
|
0.015
|
0.004
|
0.1120
|
0.1075
|
5
|
0.1250
|
0.107
|
0.145
|
0.132
|
0.017
|
0.005
|
0.1250
|
0.1202
|
6
|
0.1380
|
0.116
|
0.158
|
0.144
|
0.017
|
0.005
|
0.1380
|
0.1329
|
8
|
0.1640
|
0.142
|
0.188
|
0.172
|
0.020
|
0.006
|
0.1640
|
0.1585
|
10
|
0.1900
|
0.160
|
0.218
|
0.202
|
0.024
|
0.006
|
0.1900
|
0.1840
|
1/4
|
0.2500
|
0.215
|
0.278
|
0.261
|
0.024
|
0.007
|
0.2500
|
0.2435
|
5/16
|
0.3125
|
0.273
|
0.347
|
0.329
|
0.029
|
0.009
|
0.3125
|
0.3053
|
3/8
|
0.3750
|
0.331
|
0.415
|
0.397
|
0.034
|
0.012
|
0.3750
|
0.3678
|
7/16
|
0.4375
|
0.388
|
0.484
|
0.465
|
0.039
|
0.014
|
0.4375
|
0.4294
|
1/2
|
0.5000
|
0.446
|
0.552
|
0.531
|
0.044
|
0.016
|
0.5000
|
0.4919
|
5/8
|
0.6250
|
0.562
|
0.689
|
0.664
|
0.054
|
0.021
|
0.6250
|
0.6163
|
3/4
|
0.7500
|
0.681
|
0.828
|
0.800
|
0.066
|
0.025
|
0.7500
|
0.7406
|
7/8
|
0.8750
|
0.798
|
0.963
|
0.932
|
0.075
|
0.031
|
0.8750
|
0.8647
|
1
|
1.0000
|
0.914
|
1.100
|
1.068
|
0.085
|
0.034
|
1.0000
|
0.9886
|
1-1/8
|
1.1250
|
1.023
|
1.235
|
1.198
|
0.094
|
0.039
|
1.1250
|
1.1086
|
1-1/4
|
1.2500
|
1.148
|
1.370
|
1.333
|
0.102
|
0.044
|
1.2500
|
1.2336
|
1-3/8
|
1.3750
|
1.256
|
1.505
|
1.466
|
0.110
|
0.048
|
1.3750
|
1.3568
|
1-1/2
|
1.5000
|
1.381
|
1.640
|
1.601
|
0.119
|
0.052
|
1.5000
|
1.4818
|
1-3/4
|
1.7500
|
1.609
|
1.910
|
1.869
|
0.136
|
0.062
|
1.7500
|
1.7295
|
2
|
2.0000
|
1.843
|
2.180
|
2.128
|
0.153
|
0.071
|
2.0000
|
1.9780
|
2-1/4
|
2.2500
|
2.093
|
2.450
|
2.398
|
0.170
|
0.080
|
2.2500
|
2.2280
|
2-1/2
|
2.5000
|
2.324
|
2.720
|
2.662
|
0.187
|
0.088
|
2.5000
|
2.4762
|
2-3/4
|
2.7500
|
2.574
|
2.990
|
2.936
|
0.204
|
0.097
|
2.7500
|
2.7262
|
3
|
3.0000
|
2.824
|
3.260
|
3.206
|
0.221
|
0.106
|
3.0000
|
2.9762
|
3-1/4
|
3.2500
|
3.073
|
3.530
|
3.476
|
0.238
|
0.114
|
3.2500
|
3.2262
|
3-1/2
|
3.5000
|
3.323
|
3.800
|
3.746
|
0.255
|
0.124
|
3.5000
|
3.4762
|
3-3/4
|
3.7500
|
3.573
|
4.070
|
4.016
|
0.272
|
0.134
|
3.7500
|
3.7262
|
4
|
4.0000
|
3.823
|
4.340
|
4.288
|
0.289
|
0.143
|
4.0000
|
3.9762
|
Tags: ASME B18.3 Underhead Fillets for Socket Head Cap Screws
General Material:Stainless Steel,Nickel Alloy,Silicon Bronze,Aluminium Bronze,Brass,Naval Brass,Coppe,Copper-Nickel,Aluminum Alloy,Titanium,Alloy Steel,Such as C1008,C1018,C1022,C1035,C1045,40cr,SCM435,35crmoA,42crmoA,AISI4140SS304/A2-70,SS316/A4-80,SS310s,SS309,SS321,SS410,SS317,SS904L,17-4 PH/630,Duplex 2205,Duplex 31803,Nitronic 40,Nitronic 50,Nitronic 60,Nickel Alloy,Hastelloy C276,Inconel 600,Inconel 601,Inconel 625,Inconel 718,Inconel X750,Inconel 800H,Inconel 825,Monel 400,Monel 405,Monel K-500,MP35N,Nickel 200,Nickel 201,Waspaloy)C65500,C64200,C61400,C63000,C63200,C46200,H59,H62,H67,C46400,C11000,90/10 C70600,70/30 C71500,6061-T6,2024-T4,Ti-6Al-4V Grade 5,ASTM B348 Grade 2,ASTM B348 Grade 7,651/S63198
General Surface Finish:Blackoxide,Zinc,Dacromet 500/Dacromet 320,Non-electrolytically Deposited Zinc Flake,Hot-dip Galvanization,Phosphating,Passviation
General Surface Finish:Blackoxide,Zinc,Dacromet 500/Dacromet 320,Non-electrolytically Deposited Zinc Flake,Hot-dip Galvanization,Phosphating,Passviation