IS 3757 Bolt Dimension

Dimensional Standard of Bolts per IS 3757

• For hot-dip galvanized nuts, the dimensions apply before galvanizing.
• P is the pitch of thread.
• dw, max. = actual

Size. Pitch (p) Width across corner (e) Width across Flat (s) Thickness of head (k) Thread Length (b) da dw Shank diameter (ds) Radius under head ( r ) Washer height (c) Major Diameter (D) Pitch Diameter (D1) Minor Diameter (D2)
  MM Min Min Max Min Max Min Max Max Min Min Max Min Min Max MM Min Min Max Min
M16 2.0 29.56 26.16 27 9.25 10.75 31.00 38.00 18.70 24.90 15.30 16.70 0.60 0.40 0.80 15.68 15.96 14.50 14.60 13.80
M20 2.50 37.29 33.00 34.00 11.60 13.40 36.00 43.00 23.24 31.40 19.16 20.84 0.80 0.40 0.80 19.62 19.96 18.15 18.25 17.25
M22 2.50 39.55 35.00 36.00 13.10 14.90 38.00 45.00 25.24 33.30 21.16 22.84 0.80 0.40 0.80 21.62 21.96 20.15 20.25 19.25
M24 3.00 45.20 40.00 41 14.10 15.90 41.00 48.00 27.64 38.00 23.16 24.84 1.00 0.40 0.80 23.58 23.95 21.80 21.90 20.70
M27 3.0 50.85 45.00 46 16.10 17.90 44.00 51.00 31.24 42.80 26.16 27.84 1.20 0.40 0.80 26.58 26.95 24.80 24.90 23.70
M30 3.50 55.37 49.00 50.00 17.65 19.75 49.00 56.00 34.24 46.50 29.16 30.84 1.20 0.40 0.80 29.52 29.95 27.50 27.60 26.16
M36 4.00 66.44 58.80 60.00 21.45 23.55 56.00 63.00 41.00 55.90 35.00 37.00 1.50 0.40 0.80 35.46 35.94 33.15 33.25 31.61

Bolt Shank Length Ls & Lg
L Total Length Total Length M-16 M-20 M-22 M-24 M-27 M-30 M-36
Nominal Length Min Max Ls Lg Ls Lg Ls Lg Ls Lg Ls Lg Ls Lg Ls Lg
Min Max Min Max Min Max Min Max Min Max Min Max Min Max
70.00 68.50 71.50 33.00 39.00 26.50 34.00 24.50 32.00 20.00 29.00 17.00 26.00 10.50 21.00    
80.00 78.50 81.50 39.00 49.00 36.50 44.00 34.50 42.00 30.00 39.00 27.00 36.00 20.50 31.00 12.00 24.00
90.00 88.25 91.75 49.00 59.00 46.50 54.00 44.50 52.00 40.00 49.00 37.00 46.00 30.50 41.00 22.00 34.00
100.00 98.25 101.75 59.00 69.00 56.50 64.00 54.50 62.00 50.00 59.00 47.00 56.00 40.50 51.00 32.00 44.00
110.00 108.25 111.75 62.00 72.00 59.50 67.00 57.50 65.00 53.00 62.00 50.00 59.00 43.50 54.00 35.00 47.00
120.00 118.25 121.75 72.00 82.00 69.50 77.00 67.50 75.00 63.00 72.00 60.00 69.00 53.50 64.00 45.00 57.00
130.00 128.00 132.00 82.00 92.00 79.50 87.00 77.50 85.00 73.00 82.00 70.00 79.00 74.00 86.00 55.00 67.00
140.00 138.00 142.00 92.00 102.00 89.50 97.00 87.50 95.00 83.00 92.00 80.00 89.00 73.50 84.00 65.00 77.00
150.00 148.00 152.00 102.00 112.00 99.50 107.00 97.50 105.00 93.00 102.00 90.00 99.00 83.50 94.00 75.00 87.00
160.00 158.00 162.00 112.00 122.00 109.50 117.00 107.50 115.00 103.00 112.00 100.00 109.00 93.50 104.00 85.00 97.00
170.00 168.00 172.00 122.00 132.00 119.50 127.00 117.50 125.00 113.00 122.00 110.00 119.00 103.50 114.00 95.00 107.00
180.00 178.00 182.00 132.00 142.00 129.50 137.00 127.50 135.00 123.00 132.00 120.00 129.00 113.50 124.00 105.00 117.00
190.00 188.00 192.00 142.00 152.00 139.50 147.00 137.50 145.00 133.00 142.00 130.00 139.00 123.50 134.00 115.00 127.00
200.00 197.70 202.30 152.00 162.00 149.50 157.00 147.50 155.00 143.00 152.00 140.00 149.00 133.50 144.00 125.00 137.00
210.00 207.70 212.30 162.00 172.00 159.50 167.00 157.50 165.00 153.00 162.00 150.00 159.00 143.50 154.00 135.00 147.00
220.00 217.70 222.30 172.00 182.00 169.50 177.00 167.50 175.00 163.00 172.00 160.00 169.00 153.50 164.00 145.00 157.00
230.00 227.70 232.30 182.00 192.00 179.50 187.00 177.50 185.00 173.00 182.00 170.00 179.00 163.50 174.00 155.00 167.00
240.00 237.70 242.30 192.00 202.00 189.50 197.00 187.50 195.00 183.00 192.00 180.00 189.00 173.50 184.00 165.00 177.00
250.00 247.70 252.30 202.00 212.00 199.50 207.00 197.50 205.00 193.00 202.00 190.00 199.00 183.50 194.00 175.00 187.00
260.00 257.40 262.60 212.00 222.00 209.50 217.00 207.50 215.00 203.00 212.00 200.00 209.00 193.50 204.00 185.00 197.00
270.00 267.40 272.60 222.00 232.00 219.50 227.00 217.50 225.00 213.00 222.00 210.00 219.00 203.50 214.00 195.00 207.00
280.00 277.40 282.60 232.00 242.00 229.50 237.00 227.50 235.00 223.00 232.00 220.00 229.00 213.50 224.00 205.00 217.00
290.00 287.40 292.60 242.00 252.00 239.50 247.00 237.50 245.00 233.00 242.00 230.00 239.00 223.50 234.00 215.00 227.00
300.00 297.40 302.60 252.00 262.00 249.50 257.00 247.50 255.00 243.00 252.00 240.00 249.00 233.50 244.00 225.00 237.00
310.00 307.40 312.60 262.00 272.00 259.50 267.00 257.50 265.00 253.00 262.00 250.00 259.00 243.50 254.00 235.00 247.00
320.00 317.15 322.85 272.00 282.00 269.50 277.00 267.50 275.00 263.00 272.00 260.00 269.00 253.50 264.00 245.00 257.00
330.00 327.15 332.85 282.00 292.00 279.50 287.00 277.50 285.00 273.00 282.00 270.00 279.00 263.50 274.00 255.00 267.00
340.00 337.15 342.85 292.00 302.00 289.50 297.00 287.50 295.00 283.00 292.00 280.00 289.00 273.50 284.00 265.00 277.00
350.00 347.15 352.85 302.00 312.00 299.50 307.00 297.50 305.00 293.00 302.00 290.00 299.00 283.50 294.00 275.00 287.00
360.00 357.15 362.85 312.00 322.00 309.50 317.00 307.50 315.00 303.00 312.00 300.00 309.00 293.50 304.00 285.00 297.00
370.00 367.15 372.85 322.00 332.00 319.50 327.00 317.50 325.00 313.00 322.00 310.00 319.00 303.50 314.00 295.00 307.00
380.00 377.15 382.85 332.00 342.00 329.50 337.00 327.50 335.00 323.00 332.00 320.00 329.00 313.50 324.00 305.00 317.00
390.00 387.15 392.85 342.00 352.00 339.50 347.00 337.50 345.00 333.00 342.00 330.00 339.00 323.50 334.00 315.00 327.00
400.00 397.15 402.85 352.00 362.00 349.50 357.00 347.50 355.00 343.00 352.00 340.00 349.00 333.50 344.00 325.00 337.00
410.00 407.15 412.85 362.00 372.00 359.50 367.00 357.50 365.00 353.00 362.00 350.00 359.00 343.50 354.00 335.00 347.00
420.00 416.85 423.15 372.00 382.00 369.50 377.00 367.50 375.00 363.00 372.00 360.00 369.00 353.50 364.00 345.00 357.00
430.00 426.85 433.15 382.00 392.00 379.50 387.00 377.50 385.00 373.00 382.00 370.00 379.00 363.50 374.00 355.00 367.00
440.00 436.85 443.15 392.00 402.00 389.50 397.00 387.50 395.00 383.00 392.00 380.00 389.00 373.50 384.00 365.00 377.00
450.00 446.85 453.15 402.00 412.00 399.50 407.00 397.50 405.00 393.00 402.00 390.00 399.00 383.50 394.00 375.00 387.00
460.00 456.85 463.15 412.00 422.00 409.50 417.00 407.50 415.00 403.00 412.00 400.00 409.00 393.50 404.00 385.00 397.00
470.00 466.85 473.15 422.00 432.00 419.50 427.00 417.50 425.00 413.00 422.00 410.00 419.00 403.50 414.00 395.00 407.00
480.00 476.85 483.15 432.00 442.00 429.50 437.00 427.50 435.00 423.00 432.00 420.00 429.00 413.50 424.00 405.00 417.00
490.00 486.85 493.15 442.00 452.00 439.50 447.00 437.50 445.00 433.00 442.00 430.00 439.00 423.50 434.00 415.00 427.00
500.00 496.85 503.15 452.00 462.00 449.50 457.00 447.50 455.00 443.00 452.00 440.00 449.00 433.50 444.00 425.00 437.00
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