G-10
ZD21N-EC, ZD21-EC, ZD28-EC, WSM
G GENERAL
[3] METRIC SCREWS, BOLTS AND NUTS
0000001413E
[4] AMERICAN STANDARD SCREWS, BOLTS AND NUTS WITH UNC OR
UNF THREADS
0000001414E
[5] PLUGS
0000001666E
Grade
Unit
Nominal
Diameter
Property class 8.8 Property class 10.9
N·m kgf·m ft-lbs N·m kgf·m ft-lbs
M8 23.6 to 27.4 2.4 to 2.8 17.4 to 20.2 29.4 to 34.3 3.0 to 3.5 21.7 to 25.3
M10 48.1 to 55.8 4.9 to 5.7 35.5 to 41.2 60.8 to 70.5 6.2 to 7.2 44.9 to 52.1
M12 77.5 to 90.1 7.9 to 9.2 57.2 to 66.5 103.0 to 117.0 10.5 to 12.0 76.0 to 86.8
M14 124.0 to 147.0 12.6 to 15.0 91.2 to 108.0 167.0 to 196.0 17.0 to 20.0 123.0 to 144.0
M16 196.0 to 225.0 20.0 to 23.0 145.0 to 166.0 260.0 to 303.0 26.5 to 31.0 192.0 to 224.0
Grade
Unit
Nominal
Diameter
SAE GR.5 SAE GR.8
N·m kgf·m ft-lbs N·m kgf·m ft-lbs
5/16 23.1 to 27.8 2.35 to 2.84 17.0 to 20.5 32.5 to 39.3 3.31 to 4.01 24.0 to 29.0
3/8 47.5 to 57.0 4.84 to 5.82 35.0 to 42.0 61.0 to 73.2 6.22 to 7.47 45.0 to 54.0
1/2 108.5 to 130.2 11.07 to 13.29 80.0 to 96.0 149.2 to 179.0 15.22 to 18.27 110.0 to 132.0
9/16 149.2 to 179.0 15.22 to 18.27 110.0 to 132.0 217.0 to 260.4 22.14 to 26.57 160.0 to 192.0
5/8 203.4 to 244.1 20.75 to 24.91 150.0 to 180.0 298.3 to 358.0 30.44 to 36.53 220.0 to 264.0
Shape Size
Material of opponent part
Ordinariness Aluminum
N·m kgf·m ft-lbs N·m kgf·m ft-lbs
Tapered
screw
R1/8 12.7 to 21.6 1.3 to 2.2 9.4 to 15.9 12.7 to 19.6 1.3 to 2.0 9.4 to 15.4
R1/4 24.5 to 44.1 2.5 to 4.5 18.1 to 32.5 24.5 to 34.3 2.5 to 3.5 18.1 to 25.4
R3/8 49.0 to 88.3 5.0 to 9.0 36.2 to 65.1 49.0 to 58.8 5.0 to 6.0 36.2 to 43.4
R1/2 58.8 to 107.9 6.0 to 11.0 43.4 to 79.6 58.8 to 78.5 6.0 to 8.0 43.4 to 57.4
Straight
screw
G1/4 24.5 to 34.3 2.5 to 3.5 18.1 to 25.3 – – –
G3/8 61.8 to 82.4 6.3 to 8.4 45.6 to 60.8 – – –
G1/2 49.0 to 88.3 5.0 to 9.0 36.2 to 65.1 – – –
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