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Metric Hexagon Lag Screws

ASME/ANSI B 18.2.3.8M - 1981 (R1999)

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美标ASME/ANSI B18.2.3.8M - 1981 (R1999) AS Metric Hexagon Lag Screws
Thread Size
d
5 6 8 10 12 16 20 24
P pitch
ds max
min
s max
min
e max
min
k max
min
k1 min
R max
min
2.3 2.5 2.8 3.6 4.2 5.1 5.6 7.3
5.48 6.48 8.58 10.58 12.7 16.7 20.84 24.84
4.52 5.52 7.42 9.42 11.3 15.3 19.16 23.16
8 10 13 16 18 24 30 36
7.64 9.64 12.57 15.57 17.57 23.16 29.16 35
9.24 11.55 15.01 18.48 20.78 27.71 34.64 41.57
8.63 10.89 14.2 17.59 19.85 26.17 32.95 39.55
3.9 4.4 5.7 6.9 8 10.8 13.4 15.9
3.1 3.6 4.9 5.9 7 9.3 11.6 14.1
2.4 2.8 3.7 4.5 5.2 7 8.8 10.5
0.6 0.9 1.2 1.2 1.8 1.8 2.4 2.4
0.2 0.3 0.4 0.4 0.6 0.6 0.8 0.8
①,Thread Length b . The minimum thread length shall be equal to one-half of the nominal screw length plus 12 mm, or 150 mm, whichever is shorter. Screws too short for the formula thread length shall be threaded as close to the head or shoulder as practicable.