Manitowoc National Crane NBT40 Series - Load Charts and Work Site Assessment

1-10 Published 8-01-2017 Control # 287-11
INTRODUCTION NBT40 SERVICE MANUAL
Table 1-2 Inch Series with Fine Threads (UNF) – Zinc Flake Coated
Table 1-3 Metric Series with Coarse Threads – Zinc Flake Coated
Nominal Size, Threads per
Inch, and Series
Designation
Grade
Torque (ft/lb)
Maximum Nominal Minimum
1/4-28 UNF
5 7.5 7.3 7.1
8 10.6 10.4 10.1
5/16-24 UNF
5 15.0 14.6 14.2
8 21.1 20.6 20.1
3/8-24 UNF
5 27.2 26.5 25.8
8 38.4 37.5 36.5
7/16-20 UNF
5 42.9 41.8 40.7
8 60.6 59.1 57.6
1/2-20 UNF
5 66.0 64.4 62.7
8 93.3 90.9 88.6
9/16-18 UNF
5 94.3 91.9 89.6
8 133.2 129.9 126.6
5/8-18 UNF
5 132.1 128.8 125.5
8 186.7 182.0 177.3
3/4-16 UNF
5 231.0 225.2 219.4
8 326.4 318.2 310.1
7/8-14 UNF
5 367.7 358.5 349.3
8 519.6 506.6 493.6
1-12 UNF
5 547.4 533.7 520.0
8 773.5 754.2 734.8
1 1/8-12 UNF
5 700.0 682.5 665.0
8 1123.5 1095.4 1067.3
1 1/4-12 UNF
5 975.0 950.6 926.2
8 1564.8 1525.7 1486.5
1 3/8-12 UNF
5 1314.4 1281.5 1248.6
8 2109.5 2056.7 2004.0
1 1/2-12 UNF
5 1723.9 1680.8 1637.7
8 2766.8 2697.6 2628.4
Nominal Size, Threads per
Inch, and Series
Designation
Property
Class
Torque (Nm)
Maximum Nominal Minimum
M4x0.7
10.9 3.6 3.5 3.4
12.9 4.2 4.1 4.0
M5x0.8
10.9 7.2 7.0 6.8
12.9 8.4 8.2 8.0
Reference Only