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Metric Heavy Hex Structural Bolts (ASTM A 325M / ASTM A 490M)

ASME B 18.2.6M - 2012

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美标ASME B18.2.6M - 2012 ASME18.2.6M 18.2. Metric Heavy Hex Structural Bolts (ASTM A 325M / ASTM A 490M)
Nominal Length L Tips:seclect Nominal Length L and get Thread length.
Thread Size
d
M12 M16 M20 M22 M24 M27 M30 M36
P Pitch
ds max
min
s max
min
e max
min
k max
min
r min
b Ref.
1.75 2 2.5 2.5 3 3 3.5 4
12.70 16.70 20.84 22.84 24.84 27.84 30.84 37.00
11.30 15.30 19.16 21.16 23.16 26.16 29.16 35.00
21.00 27.00 34.00 36.00 41.00 46.00 50.00 60.00
20.16 26.16 33.00 35.00 40.00 45.00 49.00 58.80
24.25 31.18 39.26 41.57 47.34 53.12 57.74 69.28
22.78 29.56 37.29 39.55 45.20 50.85 55.37 66.44
7.95 10.75 13.40 14.90 15.90 17.90 19.75 23.55
7.05 9.25 11.60 13.10 14.10 16.10 17.65 21.45
0.6 0.6 0.8 0.8 1 1.2 1.2 1.5
25.00 31.00 36.00 38.00 41.00 44.00 49.00 56.00
Length of Thread b
- - - - - - - -
①,Chemical and mechanical properties of steel bolts shall conform to ASTM A325M or ASTM A490M as applicable.

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