ANSI/ASME B 18.3 - 2003 (R2008) Hexagon Socket Flat Countersunk Head Cap Screws


Unit: inch
Nominal Length L Tips:seclect Nominal Length L and get Thread length.
Screw Thread
d
0# 1# 2# 3# 4# 5# 6# 8# 10# 1/4 5/16
d Nominal Diameter
PP UNC
UNF
UNEF
ds max
min
dk Theo.Sharp Max
Abs. Min
k Ref
s Nominal Size
Nominal Size
t min
b min
0.060 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.190 0.250 0.313
- 64.0 56.0 48.0 40.0 40.0 32.0 32.0 24.0 20.0 18.0
80.0 72.0 64.0 56.0 48.0 44.0 40.0 36.0 32.0 28.0 24.0
- - - - - - - - - 32.0 32.0
0.060 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.019 0.250 0.313
0.0568 0.0695 0.0822 0.0949 0.1075 0.1202 0.1329 0.1585 0.1840 0.2435 0.3053
0.138 0.168 0.197 0.226 0.255 0.281 0.307 0.359 0.411 0.531 0.656
0.117 0.143 0.168 0.193 0.218 0.240 0.263 0.311 0.359 0.480 0.600
0.044 0.054 0.064 0.073 0.083 0.090 0.097 0.112 0.127 0.161 0.198
- - - 1/16 1/16 5/64 5/64 3/32 1/8 5/32 3/16
0.035 0.050 0.050 0.062 0.062 0.078 0.078 0.094 0.125 0.156 0.188
0.025 0.031 0.038 0.044 0.055 0.061 0.066 0.076 0.087 0.111 0.135
0.50 0.62 0.62 0.62 0.75 0.75 0.75 0.88 0.88 1.00 1.12
Length of Thread b
- - - - - - - - - - -
Screw Thread
d
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 Nominal Diameter
PP UNC
UNF
UNEF
ds max
min
dk Theo.Sharp Max
Abs. Min
k Ref
s Nominal Size
Nominal Size
t min
b min
0.375 0.438 0.500 0.625 0.750 0.875 1.000 1.125 1.250 1.375 1.500
16.0 14.0 13.0 11.0 10.0 9.0 8.0 7.0 7.0 6.0 6.0
24.0 20.0 20.0 18.0 16.0 14.0 12.0 12.0 12.0 12.0 12.0
32.0 28.0 28.0 24.0 20.0 20.0 20.0 18.0 18.0 18.0 18.0
0.375 0.438 0.500 0.625 0.750 0.875 1.000 1.125 1.250 1.375 1.500
0.3678 0.4294 0.4919 0.6163 0.7406 0.8647 0.9886 1.1086 1.2336 1.3568 1.4818
0.781 0.844 0.938 1.188 1.438 1.688 1.938 2.188 2.438 2.688 2.938
0.720 0.781 0.872 1.112 1.355 1.604 1.841 2.079 2.316 2.553 2.791
0.234 0.234 0.251 0.324 0.396 0.468 0.540 0.611 0.683 0.755 0.827
7/32 1/4 5/16 3/8 1/2 9/16 5/8 3/4 7/8 7/8 1
0.219 0.250 0.312 0.375 0.500 0.562 0.625 0.750 0.875 0.875 1.000
0.159 0.159 0.172 0.220 0.220 0.248 0.297 0.325 0.358 0.402 0.435
1.25 1.38 1.50 1.75 2.00 2.25 2.50 2.81 3.12 3.44 3.75
Length of Thread b
- - - - - - - - - - -
Suppliers
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1
China Mainland Nanjing Dongming Fasteners Co.,Ltd
Wang Jiajie
Mobile Phone: +86-13851939828 Telephone: +86-25-86183701-8026
Material: 304, 316 stainless steel; Grade: A2-70, A4-80; Complete Specifications
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