External Metric ISO Thread Table Chart Sizes M260 - M1060

ISO Hardware Engineering Data
Fastener and Screw / Bolt Design, Formula and Calculations

The following are metric external thread size table chart for sizes M 260 to M 1060 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. Do not use these values for standard metric internal thread designs. All units in mm.

Metric Internal and External threads

Where:

H = P ( 31/2 / 2 ) = 0.866025 P
or
0.125H = 0.108253P

ISO Metric
Thread
Designation
Pitch
External Threads
Tolerance
Class
Major Dia
Pitch Dia
Minor Dia
Max
Min
Max
Min
Max
Min
M260x8
8
6g
259.900
259.190
254.704
254.349
251.240
249.421
M260x8
8
4g6g
259.900
259.190
254.704
254.480
251.240
249.552
M260x6
6
6g
259.920
259.320
256.023
255.708
253.425
252.012
M260x6
6
4g6g
259.920
259.320
256.023
255.823
253.425
252.127
M260x4
4
6g
259.940
259.465
257.342
257.062
255.610
254.598
M260x4
4
4g6g
259.940
259.465
257.342
257.162
255.610
254.698
M260x3
3
6g
259.952
259.577
258.003
257.753
256.704
255.905
M260x3
3
4g6g
259.952
259.577
258.003
257.843
256.704
255.995
M265x6
6
6g
264.920
264.320
261.023
260.708
258.425
257.012
M265x6
6
4g6g
264.920
264.320
261.023
260.823
258.425
257.127
M265x4
4
6g
264.940
264.465
262.342
262.062
260.610
259.598
M265x4
4
4g6g
264.940
264.465
262.342
262.162
260.610
259.698
M265x3
3
6g
264.952
264.577
263.003
262.753
261.704
260.905
M265x3
3
4g6g
264.952
264.577
263.003
262.843
261.704
260.995
M270x6
6
6g
269.920
269.320
266.023
265.708
263.425
262.012
M270x6
6
4g6g
269.920
269.320
266.023
265.823
263.425
262.127
M270x4
4
6g
269.940
269.465
267.342
267.062
265.610
264.598
M270x4
4
4g6g
269.940
269.465
267.342
267.162
265.610
264.698
M270x3
3
6g
269.952
269.577
268.003
267.753
266.704
265.905
M270x3
3
4g6g
269.952
269.577
268.003
267.843
266.704
265.995
M275x6
6
6g
274.920
274.320
271.023
270.708
268.425
267.012
M275x6
6
4g6g
274.920
274.320
271.023
270.823
268.425
267.127
M275x4
4
6g
274.940
274.465
272.342
272.062
270.610
269.598
M275x4
4
4g6g
274.940
274.465
272.342
272.162
270.610
269.698
M275x3
3
6g
274.952
274.577
273.003
272.753
271.704
270.905
M275x3
3
4g6g
274.952
274.577
273.003
272.843
271.704
270.995
M280x8
8
6g
279.900
279.190
274.704
274.349
271.240
269.421
M280x8
8
4g6g
279.900
279.190
274.704
274.480
271.240
269.552
M280x6
6
6g
279.920
279.320
276.023
275.708
273.425
272.012
M280x6
6
4g6g
279.920
279.320
276.023
275.823
273.425
272.127
M280x4
4
6g
279.940
279.465
277.342
277.062
275.610
274.598
M280x4
4
4g6g
279.940
279.465
277.342
277.162
275.610
274.698
M280x3
3
6g
279.952
279.577
278.003
277.753
276.704
275.905
M280x3
3
4g6g
279.952
279.577
278.003
277.843
276.704
275.995
M285x6
6
6g
284.920
284.320
281.023
280.708
278.425
277.012
M285x6
6
4g6g
284.920
284.320
281.023
280.823
278.425
277.127
M285x4
4
6g
284.940
284.465
282.342
282.062
280.610
279.598
M285x4
4
4g6g
284.940
284.465
282.342
282.162
280.610
279.698
M285x3
3
6g
284.952
284.577
283.003
282.753
281.704
280.905
M285x3
3
4g6g
284.952
284.577
283.003
282.843
281.704
280.995
M290x6
6
6g
289.920
289.320
286.023
285.708
283.425
282.012
M290x6
6
4g6g
289.920
289.320
286.023
285.823
283.425
282.127
M290x4
4
6g
289.940
289.465
287.342
287.062
285.610
284.598
M290x4
4
4g6g
289.940
289.465
287.342
287.162
285.610
284.698
M290x3
3
6g
289.952
289.577
288.003
287.753
286.704
285.905
M290x3
3
4g6g
289.952
289.577
288.003
287.843
286.704
285.995
M295x6
6
6g
294.920
294.320
291.023
290.708
288.425
287.012
M295x6
6
4g6g
294.920
294.320
291.023
290.823
288.425
287.127
M295x4
4
6g
294.940
294.465
292.342
292.062
290.610
289.598
M295x4
4
4g6g
294.940
294.465
292.342
292.162
290.610
289.698
M295x3
3
6g
294.952
294.577
293.003
292.753
291.704
290.905
M295x3
3
4g6g
294.952
294.577
293.003
292.843
291.704
290.995
M300x8
8
6g
299.900
299.190
294.704
294.349
291.240
289.421
M300x8
8
4g6g
299.900
299.190
294.704
294.480
291.240
289.552
M300x6
6
6g
299.920
299.320
296.023
295.708
293.425
292.012
M300x6
6
4g6g
299.920
299.320
296.023
295.823
293.425
292.127
M300x4
4
6g
299.940
299.465
297.342
297.062
295.610
294.598
M300x4
4
4g6g
299.940
299.465
297.342
297.162
295.610
294.698
M300x3
3
6g
299.952
299.577
298.003
297.753
296.704
295.905
M300x3
3
4g6g
299.952
299.577
298.003
297.843
296.704
295.995
M310x6
6
6g
309.920
309.320
306.023
305.708
303.425
302.012
M310x6
6
4g6g
309.920
309.320
306.023
305.823
303.425
302.127
M310x4
4
6g
309.940
309.465
307.342
307.062
305.610
304.598
M310x4
4
4g6g
309.940
309.465
307.342
307.162
305.610
304.698
M320x6
6
6g
319.920
319.320
316.023
315.708
313.425
312.012
M320x6
6
4g6g
319.920
319.320
316.023
315.823
313.425
312.127
M320x4
4
6g
319.940
319.465
317.342
317.062
315.610
314.598
M320x4
4
4g6g
319.940
319.465
317.342
317.162
315.610
314.698
M330x6
6
6g
329.920
329.320
326.023
325.708
323.425
322.012
M330x6
6
4g6g
329.920
329.320
326.023
325.823
323.425
322.127
M330x4
4
6g
329.940
329.465
327.342
327.062
325.610
324.598
M330x4
4
4g6g
329.940
329.465
327.342
327.162
325.610
324.698
M330x6
6
6g
339.920
339.320
336.023
335.708
333.425
332.012
M340x6
6
4g6g
339.920
339.320
336.023
335.823
333.425
332.127
M340x4
4
6g
339.940
339.465
337.342
337.062
335.610
334.598
M340x4
4
4g6g
339.940
339.465
337.342
337.162
335.610
334.698
M350x6
6
6g
349.920
349.320
346.023
345.708
343.425
342.012
M350x6
6
4g6g
349.920
349.320
346.023
345.823
343.425
342.127
M350x4
4
6g
349.940
349.465
347.342
347.062
345.610
344.598
M350x4
4
4g6g
349.940
349.465
347.342
347.162
345.610
344.698
M360x6
6
6g
359.920
359.320
356.023
355.668
353.425
351.972
M360x6
6
4g6g
359.920
359.320
356.023
355.799
353.425
352.103
M360x4
4
6g
359.940
359.465
357.342
357.042
355.610
354.578
M360x4
4
4g6g
359.940
359.465
357.342
357.152
355.610
354.688
M370x6
6
6g
369.920
369.320
366.023
365.668
363.425
361.972
M370x6
6
4g6g
369.920
369.320
366.023
365.799
363.425
362.103
M370x4
4
6g
369.940
369.465
367.342
367.042
365.610
364.578
M370x4
4
4g6g
369.940
369.465
367.342
367.152
365.610
364.688
M380x6
6
6g
379.920
379.320
376.023
375.668
373.425
371.972
M380x6
6
4g6g
379.920
379.320
376.023
375.799
373.425
372.103
M380x4
4
6g
379.940
379.465
377.342
377.042
375.610
374.578
M380x4
4
4g6g
379.940
379.465
377.342
377.152
375.610
374.688
M390x6
6
6g
389.920
389.320
386.023
385.668
383.425
381.972
M390x6
6
4g6g
389.920
389.320
386.023
385.799
383.425
382.103
M390x4
4
6g
389.940
389.465
387.342
387.042
385.610
384.578
M390x4
4
4g6g
389.940
389.465
387.342
387.152
385.610
384.688
M400x6
6
6g
399.920
399.320
396.023
395.668
393.425
391.972
M400x6
6
4g6g
399.920
399.320
396.023
395.799
393.425
392.103
M400x4
4
6g
399.940
399.465
397.342
397.042
395.610
394.578
M400x4
4
4g6g
399.940
399.465
397.342
397.152
395.610
394.688
M410x6
6
6g
409.920
409.320
406.023
405.668
403.425
401.972
M410x6
6
4g6g
409.920
409.320
406.023
405.799
403.425
402.103
M420x6
6
6g
419.920
419.320
416.023
415.668
413.425
411.972
M420x6
6
4g6g
419.920
419.320
416.023
415.799
413.425
412.103
M430x6
6
6g
429.920
429.320
426.023
425.668
423.425
421.972
M430x6
6
4g6g
429.920
429.320
426.023
425.799
423.425
422.103
M440x6
6
6g
439.920
439.320
436.023
435.668
433.425
431.972
M440x6
6
4g6g
439.920
439.320
436.023
435.799
433.425
432.103
M450x6
6
6g
449.920
449.320
446.023
445.668
443.425
441.972
M450x6
6
4g6g
449.920
449.320
446.023
445.799
443.425
442.103
M460x6
6
6g
459.920
459.320
456.023
455.668
453.425
451.972
M460x6
6
4g6g
459.920
459.320
456.023
455.799
453.425
452.103
M470x6
6
6g
469.920
469.320
466.023
465.668
463.425
461.972
M470x6
6
4g6g
469.920
469.320
466.023
465.799
463.425
462.103
M480x6
6
6g
479.920
479.320
476.023
475.668
473.425
471.972
M480x6
6
4g6g
479.920
479.320
476.023
475.799
473.425
472.103
M490x6
6
6g
489.920
489.320
486.023
485.668
483.425
481.972
M490x6
6
4g6g
489.920
489.320
486.023
485.799
483.425
482.103
M500x6
6
6g
499.920
499.320
496.023
495.668
493.425
491.972
M500x6
6
4g6g
499.920
499.320
496.023
495.799
493.425
492.103
M510x6
6
6g
509.920
509.320
506.023
505.668
503.425
501.972
M510x6
6
4g6g
509.920
509.320
506.023
505.799
503.425
502.103
M520x6
6
6g
519.920
519.320
516.023
515.668
513.425
511.972
M520x6
6
4g6g
519.920
519.320
516.023
515.799
513.425
512.103
M530x6
6
6g
529.920
529.320
526.023
525.668
523.425
521.972
M530x6
6
4g6g
529.920
529.320
526.023
525.799
523.425
522.103
M540x6
6
6g
539.920
539.320
536.023
535.668
533.425
531.972
M540x6
6
4g6g
539.920
539.320
536.023
535.799
533.425
532.103
M550x6
6
6g
549.920
549.320
546.023
545.668
543.425
541.972
M550x6
6
4g6g
549.920
549.320
546.023
545.799
543.425
542.103
M560x6
6
6g
559.920
559.320
556.023
555.668
553.425
551.972
M560x6
6
4g6g
559.920
559.320
556.023
555.799
553.425
552.103
M570x6
6
6g
569.920
569.320
566.023
565.668
563.425
561.972
M570x6
6
4g6g
569.920
569.320
566.023
565.799
563.425
562.103
M580x6
6
6g
579.920
579.320
576.023
575.668
573.425
571.972
M580x6
6
4g6g
579.920
579.320
576.023
575.799
573.425
572.103
M590x6
6
6g
589.920
589.320
586.023
585.668
583.425
581.972
M590x6
6
4g6g
589.920
589.320
586.023
585.799
583.425
582.103
M600x6
6
6g
599.920
599.320
596.023
595.668
593.425
591.972
M600x6
6
4g6g
599.920
599.320
596.023
595.799
593.425
592.103
M1060x8
8
6g
1059.900
1059.190
1054.704
1054.279
1051.240
1049.351

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