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Material
ASTM F837-2013(R2018)
Stainless steel socket head cap screws
Material Designation
Chemical Composition (%)
F837 Group 1-AF 303
(
S30300
)
Min
Max
F837 Group 1-CW 303
(
S30300
)
Min
Max
F837 Group 1-CW1 303
(
S30300
)
Min
Max
F837 Group 1-CW1 304
(
S30400
)
Min
Max
F837 Group 1-CW 304
(
S30400
)
Min
Max
F837 Group 1-AF 304
(
S30400
)
Min
Max
F837 Group 1-AF 304L
(
S30403
)
Min
Max
F837 Group 1-CW 304L
(
S30403
)
Min
Max
F837 Group 1-CW1 304L
(
S30403
)
Min
Max
F837 Group 1-CW1 305
(
S30500
)
Min
Max
F837 Group 1-CW 305
(
S30500
)
Min
Max
F837 Group 1-AF 305
(
S30500
)
Min
Max
F837 Group 1-AF 384
(
S38400
)
Min
Max
F837 Group 1-CW 384
(
S38400
)
Min
Max
F837 Group 1-CW1 384
(
S38400
)
Min
Max
F837 Group 1-CW1 XM1
(
S20300
)
Min
Max
F837 Group 1-CW XM1
(
S20300
)
Min
Max
F837 Group 1-AF XM1
(
S20300
)
Min
Max
F837 Group 1-AF 18-9LW
(
S30430
)
Min
Max
F837 Group 1-CW 18-9LW
(
S30430
)
Min
Max
F837 Group 1-CW1 18-9LW
(
S30430
)
Min
Max
F837 Group 1-CW1 302HQ
(
S30433
)
Min
Max
F837 Group 1-CW 302HQ
(
S30433
)
Min
Max
F837 Group 1-AF 302HQ
(
S30433
)
Min
Max
F837 Group 1-AF 304J3
Min
Max
F837 Group 1-CW 304J3
Min
Max
F837 Group 1-CW1 304J3
Min
Max
F837 Group 2-CW1 316
(
S31600
)
Min
Max
F837 Group 2-CW 316
(
S31600
)
Min
Max
F837 Group 2-AF 316
(
S31600
)
Min
Max
F837 Group 2-AF 316L
(
S31603
)
Min
Max
F837 Group 2-CW 316L
(
S31603
)
Min
Max
F837 Group 2-CW1 316L
(
S31603
)
Min
Max
F837 Group 5-HT 410
(
41000
)
Min
Max
For Reference Only