pronovost P-1624, Operator'S Manual, Page: 33 / 36

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min. max. min. max. min. max. min. max. min. max. min. max.
M6 UNC 1.00 3.6 5.8 4.9 7.9 5.8 9.4 7.9 12.7 7.2 10 9.8 13.6
M8 UNC 1.25 7.2 14 9.8 19 17 22 23 29.8 20 26 27.1 35.2
M10 UNC 1.5 20 25 27.1 33.9 34 40 46.1 54.2 38 46 51.5 62.3
M12 UNC 1.75 28 34 37.9 46.1 51 59 69.1 79.9 57 66 77.2 89.4
M14 UNC 2.0 49 56 66.4 75.9 81 93 109.8 126 96 109 130.1 147.7
M16 UNC 2.0 67 77 90.8 104.3 116 130 157.2 176.2 129 145 174.8 196.5
M18 UNC 2.0 88 100 119.2 136 150 168 203.3 227.6 175 194 237.1 262.9
M20 UNC 2.5 108 130 146.3 176.2 186 205 252 277.8 213 249 288.6 337.4
M8 UNF 1.0 12 17 16.3 23 19 27 25.7 36.6 22 31 29.8 42
M10 UNF 1.25 20 29 27.1 39.3 35 47 47.4 63.7 40 52 54.2 70.5
M12 UNF 1.25 31 41 42 55.6 56 68 75.9 92.1 62 75 84 101.6
M14 UNF 1.5 52 64 70.5 86.7 90 106 122 143.6 107 124 145 168
M16 UNF 1.5 69 83 93.5 112.5 120 138 162.6 187 140 158 189.7 214.1
M18 UNF 1.5 100 117 136 158.5 177 199 239.8 269.6 202 231 273.7 313
M20 UNF 1.5 132 150 178.9 203.3 206 242 279.1 327.9 246 289 333.3 391.6
Inches mm min. max. min. max. min. max. min. max. min. max. min. max.
1/4 6.35 5 6 6.8 8.13 9 11 12.2 14.9 12 15 16.3 30.3
5/16 7.94 10 12 13.6 16.3 17 20.5 23.1 27.8 24 29 32.5 39.3
3/8 9.53 20 23 27.1 31.2 35 42 47.5 57.0 45 54 61.0 73.2
7/16 11.11 30 35 40.7 47.4 54 64 73.2 86.8 70 84 94.9 113.9
1/2 12.70 45 52 61.0 70.5 80 96 108.5 130.2 110 132 149.2 179.0
9/16 14.29 65 75 88.1 101.6 110 132 149.2 179.0 160 192 217.0 260.4
5/8 15.88 95 105 128.7 142.3 150 180 203.4 244.1 220 264 298.3 358.0
3/4 19.05 150 185 203.3 250.7 270 324 366.1 439.3 380 456 515.3 618.3
7/8 22.23 160 200 216.8 271.0 400 480 542.4 650.9 600 720 813.6 976.3
1 25.40 250 300 338.8 406.5 580 696 786.5 943.8 900 1080 1220.4 1464.5
1 1/8 25.58 - - - - 800 880 1084.8 1193.3 1280 1440 1735.7 1952.6
1 1/4 31.75 - - - - 1120 1240 1518.7 1681.4 1820 2000 2467.9 2712.0
1 3/8 34.93 - - - - 1460 1680 1979.8 2278.1 2380 2720 3227.3 3688.3
1 1/2 38.10 - - - - 1940 2200 2630.6 2983.2 3160 3560 4285.0 4827.4
TORQUE CHART
TORQUE SPECIFICATION TABLE
Thread UNC and UNF
Use the above torques when special torque is not given.
NOTE: These values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do
not apply if extreme pressure lubricants are used.
Pound feet Newton meters Pound feet Newton meters Pound feet Newton meters
* Thick nuts must be used with grade 8 bolts.
Bolt size Torque Torque Torque
Torque Torque
Pound feet Newton meters Pound feet Newton meters Pound feet Newton meters
Size of
screw
Pitch (mm)
Torque
Grade 7T
Grade 8T
Grade 4T
Grade 2 Grade 5 Grade 8*
Thread
9