4.2.3 BOLT THREAD DATA
Table 6 — Basic dimensions for UNC Coarse Thread Series — ANSI B1.1-1982
Nominal size
Major in . ( D )
Basic diameter
Minor in .
Threads per Inch ( n )
Area
Nominal |
Minor 1
|
Tensile stress 2
|
in 2
|
in 2
|
in 2
|
No . 10 0.1900 0.1449 24 0.0284 0.0145 0.0175 No . 12 0.2160 0.1709 24 0.0366 0.0206 0.0242 1 / 4 0.2500 0.1959 20 0.0491 0.0269 0.0318 5 / 16 0.3125 0.2524 18 0.0767 0.0454 0.0524 3 / 8 0.3750 0.3073 16 0.1104 0.0678 0.0775 7 / 16 0.4375 0.3602 14 0.1503 0.0933 0.1063 1 / 2 0.5000 0.4167 13 0.1963 0.1257 0.1419 9 / 16 0.5625 0.4723 12 0.2485 0.1620 0.1819 5 / 8 0.6250 0.5266 11 0.3068 0.2017 0.2260 3 / 4 0.7500 0.6417 10 0.4418 0.3019 0.3345 7 / 8 0.8750 0.7547 9 0.6013 0.4192 0.4617 1 1.0000 0.8647 8 0.7854 0.5509 0.6057 1-1 / 8 1.1250 0.9704 7 0.9940 0.6929 0.7633 1-1 / 4 1.2500 1.0954 7 1.2272 0.8896 0.9691
1 Minor area = 0.7854 ( D – 1.3 / n ) 2 2 Tensile stress area = 0.7854 ( D – 0.9743 / n ) 2
Figure 1 - Basic profile for screw threads
Table 7 — Basic dimensions for M profile metric thread series – ANSI B1.13M-1979
Nominal size
Major mm ( D )
Basic diameter
Minor mm
Thread pitch mm ( P )
Area
Nominal Tensile stress 1 mm 2 mm 2
M8 8 6.62 1.25 50.3 36.6 M10 10 8.34 1.50 78.5 58.0 M12 12 10.07 1.75 113.1 84.3 M16 16 13.80 2.00 201.1 157.0 M20 20 17.25 2.50 314.2 245.0 M24 24 20.70 3.00 452.4 353.0
1 Tensile stress area = 0.7854 ( D - 0.9382 P ) 2
Anchor Fastening Technical Guide Edition 22 | 4.0 REFERENCE | 4.3 TECHNICAL REFERENCES Hilti , Inc . 1-800-879-8000 | en español 1-800-879-5000 | www . hilti . com | Hilti ( Canada ) Corporation | www . hilti . ca | 1-800-363-4458
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