Page 1 of 2
REV-05
Fastenal Product Standard
Date: March 11, 2015
FHSCS.SS
Flat Head Socket Cap Screws, Stainless Steel
The information below lists the required dimensional, chemical and physical characteristics of the products in this purchase order. If
the order received does not meet these requirements, it may result in a supplier corrective action request, which could jeopardize your
status as an approved vendor. Unless otherwise specified, all referenced consensus standards must be adhered to in their entirety.
Size
#0
#1
#2
#3
#4
#5
#6
#8
#10
#12
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
D
A
H
G
P
J
T
Body Diameter
Head Diameter
Head Height
Protrusion Gage
Diameter
Protrusion
Hex Socket
Key
Engagement
Max.
.0600
.0730
.0860
.0990
.1120
.1250
.1380
.1640
.1900
.2158
.2500
.3125
.3750
.4375
.5000
.6250
.7500
.8750
1.000
1.1250
1.2500
1.3750
1.5000
Min.
.0568
.0695
.0822
.0949
.1075
.1202
.1329
.1585
.1840
.2102
.2435
.3053
.3678
.4294
.4919
.6163
.7406
.8647
.9886
1.1086
1.2336
1.3568
1.4818
Max.
.138
.168
.197
.226
.255
.281
.307
.359
.411
.450
.531
.656
.781
.844
.938
1.188
1.438
1.688
1.938
2.188
2.438
2.688
2.938
Min.
.117
.143
.168
.193
.218
.240
.263
.311
.359
.410
.480
.600
.720
.781
.872
1.112
1.355
1.604
1.841
2.079
2.316
2.553
2.791
Ref.
.044
.054
.064
.073
.083
.090
.097
.112
.127
.135
.161
.198
.234
.234
.251
.324
.396
.468
.540
.611
.683
.755
.827
Max.
.078
.101
.124
.148
.172
.196
.220
.267
.313
.360
.424
.539
.653
.690
.739
.962
1.186
1.411
1.635
1.859
2.083
2.306
2.530
Min.
.077
.100
.123
.147
.171
.195
.219
.266
.312
.359
.423
.538
.652
.689
.738
.961
1.185
1.410
1.634
1.858
2.082
2.305
2.529
Max.
.044
.048
.051
.054
.057
.059
.060
.063
.066
.069
.072
.078
.088
.104
.131
.146
.170
.165
.181
.196
.212
.228
.243
Min.
.026
.028
.031
.033
.036
.037
.037
.039
.041
.042
.043
.047
.050
.063
.087
.096
.105
.118
.130
.140
.150
.162
.173
Max.
0.0355
0.0510
0.0510
0.0635
0.0635
0.0791
0.0791
0.0952
0.1270
0.1270
0.1587
0.1900
0.2217
0.2530
0.3160
0.3790
0.5050
0.5680
0.6310
0.7570
0.8850
0.8850
1.0200
Min.
0.0350
0.0500
0.0500
0.0625
0.0625
0.0781
0.0781
0.0937
0.1250
0.1250
0.1562
0.1875
0.2187
0.2500
0.3125
0.3750
0.5000
0.5625
0.6250
0.7500
0.8750
0.8750
1.0000
Min.
.025
.031
.038
.044
.055
.061
.066
.076
.087
.094
.111
.135
.159
.159
.172
.220
.220
.248
.297
.325
.358
.402
.435
Screws with lengths 1-1/2 times the nominal diameter or shorter may be undercut to facilitate full
length threads
F
Fillet
Transition
Diameter
Max.
.072
.089
.106
.119
.136
.153
.168
.194
.220
.246
.280
.343
.405
.468
.530
.655
.780
.905
1.030
1.187
1.312
1.437
1.562
Page 2 of 2
Fastenal Product Standard
Date: March 11, 2015
REV-05
FHSCS.SS
Specification Requirements:
•
Dimensions:
•
•
Material &
Mechanical Properties:
Thread Requirements:
•
•
Finish:
Material Test Reports:
ASME B18.3
#12 see dimensions above. Body & Grip Lengths
are equivalent to a #10 per ASME B18.3
Alloy Group 1, Alloy Condition CW per ASTM F879
ASME B1.1, Class 3A UNC and UNF (0.060” to 1” inclusive)
Class 2A UNC and UNF (Over 1” to 1.5” inclusive)
Class 2A UNC series (Over 1.5”)
Per ASTM A380
The MTR must have documented lot traceability, dimensional
results, full chemical test results and full mechanical test results to the
specification(s) above.