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Unit:inch

Hexagon Socket Flat Countersunk Head Cap

ASTM 18.3 (Table 8-III) - 2012

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美标ASTM 18.3 (Table 8-III) - 2012 ASTM18. Hexagon Socket Flat Countersunk Head Cap
Download CAD Model*

 *Models with different eras.

Nominal Diameter
d
2# 4# 5# 6# 8# 10# 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1
d Nominal Diameter
PP UNC
UNF
UNEF
ds max
min
dk max
min
k Ref
A Ref.
t min
b min
α ±2°
Socket No.
0.086 0.112 0.125 0.138 0.164 0.19 0.25 0.3125 0.375 0.4375 0.5 0.625 0.75 0.875 1
56 40 40 32 32 24 20 18 16 14 13 11 10 9 8
64 48 44 40 36 32 28 24 24 20 20 18 16 14 12
- - - - - - 32 32 32 28 28 24 20 20 20
0.086 0.112 0.125 0.138 0.164 0.19 0.25 0.3125 0.375 0.4375 0.5 0.625 0.75 0.875 1
0.0822 0.1075 0.1202 0.1329 0.1585 0.184 0.2435 0.3053 0.3678 0.4294 0.4919 0.6163 0.7406 0.8647 0.9886
0.197 0.255 0.281 0.307 0.359 0.411 0.531 0.656 0.781 0.844 0.938 1.188 1.438 1.688 1.938
0.168 0.218 0.24 0.263 0.311 0.359 0.48 0.6 0.72 0.781 0.872 1.112 1.355 1.604 1.841
0.064 0.083 0.09 0.097 0.112 0.127 0.161 0.198 0.234 0.234 0.251 0.324 0.396 0.468 0.54
0.094 0.111 0.111 0.132 0.155 0.178 0.221 0.266 0.312 0.352 0.352 0.446 0.529 0.619 0.795
0.03 0.035 0.04 0.04 0.045 0.05 0.065 0.087 0.105 0.100 0.119 0.135 0.205 0.265 0.285
0.62 0.75 0.75 0.75 0.88 0.88 1 1.12 1.25 1.38 1.5 1.75 2 2.25 2.5
82° 82° 82° 82° 82° 82° 82° 82° 82° 82° 82° 82° 82° 82° 82°
T8 T10 T10 T15 T20 T25 T30 T40 T45 T50 T50 T55 T60 T70 T90
①,Material
a、Alloy steel shall conform in all respects to ASTM F835
b、Corrosion-resistant steel shall conform in all respects to ASTM F879

Alternative history

ASME B 18.3 - 2012 ASTM 18.3Table 8-III - 2012
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