Hex Bolts BS 3692
Hexagon head bolt, washer-faced
ISO metric precision hexagon bolts and screws
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Size and Thread Diameter d |
Pitch of (Thread series) | Thread runout a max. |
Diameter of shank d |
Width across flats s |
Width across corners e |
Diameter of washer face d |
Depth of washer face c |
Transition Diameter da max. |
Radius under head r |
Height of head k |
Eccentricity of head max. |
Eccentricity of shank and split pin hole to the thread max. |
||||||
| max. | min. | max. | min. | max. | min. | max. | min. | max. | min. | max. | min. | |||||||
| M1.6 | 0.35 | 0.8 | 1.6 | 1.46 | 3.2 | 3.08 | 3.7 | 3.48 | --- | --- | -- | 2.0 | 0.2 | 0.1 | 1.23 | 0.98 | 0.18 | 0.14 |
| M2 | 0.4 | 1.0 | 2.0 | 1.86 | 4.0 | 3.88 | 4.6 | 4.38 | --- | --- | --- | 2.6 | 0.3 | 0.1 | 1.53 | 1.28 | 0.18 | 0.14 |
| M2.5 | 0.45 | 1.0 | 2.5 | 2.23 | 5.0 | 4.88 | 5.8 | 5.51 | --- | --- | --- | 3.1 | 0.3 | 0.1 | 1.83 | 1.58 | 0.18 | 0.14 |
| M3 | 0.5 | 1.2 | 3.0 | 2.86 | 5.5 | 5.38 | 6.4 | 6.08 | 5.08 | 4.83 | 0.1 | 3.6 | 0.3 | 0.1 | 2.13 | 1.90 | 0.18 | 0.14 |
| M4 | 0.7 | 1.6 | 4.0 | 3.82 | 7.0 | 6.85 | 8.1 | 7.74 | 6.55 | 6.30 | 0.1 | 4.7 | 0.35 | 0.2 | 2.93 | 2.68 | 0.22 | 0.18 |
| M5 | 0.8 | 2.0 | 5.0 | 4.82 | 8.0 | 7.85 | 9.2 | 8.87 | 7.55 | 7.30 | 0.2 | 5.7 | 0.35 | 0.2 | 3.66 | 3.35 | 0.22 | 0.18 |
| M6 | 1 | 2.5 | 6.0 | 5.82 | 10.0 | 9.78 | 11.5 | 11.05 | 9.48 | 9.23 | 0.3 | 6.8 | 0.4 | 0.25 | 4.15 | 3.85 | 0.22 | 0.18 |
| M8 | 1.25 | 3.0 | 8.0 | 7.78 | 13.0 | 12.73 | 15.0 | 14.38 | 12.43 | 12.18 | 0.4 | 9.2 | 0.6 | 0.4 | 5.65 | 5.35 | 0.27 | 0.22 |
| M10 | 1.5 | 3.5 | 10.0 | 9.78 | 17.0 | 16.73 | 19.6 | 18.9 | 16.43 | 16.18 | 0.4 | 11.2 | 0.6 | 0.4 | 7.18 | 6.82 | 0.27 | 0.22 |
| M12 | 1.75 | 4.0 | 12.0 | 11.73 | 19.0 | 18.67 | 21.9 | 21.10 | 18.37 | 18.12 | 0.4 | 14.2 | 1.1 | 0.6 | 8.18 | 7.82 | 0.33 | 0.27 |
| (M14) | 2 | 5.0 | 14.0 | 13.73 | 22.0 | 21.67 | 25.4 | 24.49 | 21.37 | 21.12 | 0.4 | 16.2 | 1.1 | 0.6 | 9.18 | 8.82 | 0.33 | 0.27 |
| M16 | 2 | 5.0 | 16.0 | 15.73 | 24.0 | 23.67 | 27.7 | 26.75 | 23.27 | 23.02 | 0.4 | 18.2 | 1.1 | 0.6 | 10.18 | 9.82 | 0.33 | 0.27 |
| (M18) | 2.5 | 6.0 | 18.0 | 17.73 | 27.0 | 26.67 | 31.2 | 30.14 | 26.27 | 26.02 | 0.4 | 20.2 | 1.1 | 0.6 | 12.22 | 11.79 | 0.33 | 0.27 |
| M20 | 2.5 | 6.0 | 20.0 | 19.67 | 30.0 | 29.67 | 34.6 | 33.53 | 29.27 | 28.80 | 0.4 | 22.4 | 1.2 | 0.8 | 13.22 | 12.79 | 0.33 | 0.33 |
| (M22) | 2.5 | 6.0 | 22.0 | 21.67 | 32.0 | 31.61 | 36.9 | 35.72 | 31.21 | 30.74 | 0.4 | 24.4 | 1.2 | 0.8 | 14.22 | 13.79 | 0.39 | 0.33 |
| M24 | 3 | 7.0 | 24.0 | 23.67 | 36.0 | 35.48 | 41.6 | 39.98 | 34.98 | 34.51 | 0.5 | 26.4 | 1.2 | 0.8 | 15.22 | 14.79 | 0.39 | 0.33 |
| (M27) | 3 | 7.0 | 27.0 | 26.67 | 41.0 | 40.38 | 47.3 | 45.63 | 39.98 | 39.36 | 0.5 | 30.4 | 1.7 | 1.0 | 17.22 | 16.79 | 0.39 | 0.33 |
| M30 | 3.5 | 8.0 | 30.0 | 29.67 | 46.0 | 45.38 | 53.1 | 51.28 | 44.98 | 44.36 | 0.5 | 33.4 | 1.7 | 1.0 | 19.26 | 18.74 | 0.39 | 0.33 |
| (M33) | 3.5 | 8.0 | 33.0 | 32.61 | 50.0 | 49.38 | 57.7 | 55.80 | 48.98 | 48.36 | 0.5 | 36.4 | 1.7 | 1.0 | 21.26 | 20.74 | 0.39 | 0.39 |
| M36 | 4 | 10.0 | 36.0 | 35.61 | 55.0 | 54.26 | 63.5 | 61.31 | 53.86 | 53.24 | 0.5 | 39.4 | 1.7 | 1.0 | 23.26 | 22.74 | 0.46 | 0.39 |
| (M39) | 4 | 10.0 | 39.0 | 38.61 | 60.0 | 59.26 | 63.3 | 66.96 | 58.86 | 58.24 | 0.6 | 42.4 | 1.7 | 1.0 | 25.26 | 22.74 | 0.46 | 0.39 |
| M42 | 4.5 | 11.0 | 42.0 | 41.61 | 65.0 | 64.26 | 75.1 | 72.61 | 63.76 | 63.04 | 0.6 | 45.6 | 1.8 | 1.2 | 26.26 | 25.74 | 0.46 | 0.39 |
| (M45) | 4.5 | 11.0 | 45.0 | 44.61 | 70.0 | 69.26 | 80.8 | 78.26 | 68.76 | 68.04 | 0.6 | 48.6 | 1.8 | 1.2 | 28.26 | 27.74 | 0.46 | 0.39 |
| M48 | 5 | 12.0 | 48.0 | 47.61 | 75.0 | 74.26 | 86.6 | 83.91 | 73.76 | 73.04 | 0.6 | 52.6 | 2.3 | 1.6 | 30.26 | 29.74 | 0.46 | 0.39 |
| (M52) | 5 | 12.0 | 52.0 | 51.54 | 80.0 | 79.26 | 92.4 | 89.56 | --- | --- | --- | 56.6 | 2.3 | 1.6 | 33.21 | 32.69 | 0.46 | 0.46 |
| M56 | 5.5 | 19.0 | 56.0 | 55.54 | 85.0 | 84.13 | 98.1 | 95.07 | --- | --- | --- | 63.0 | 3.5 | 2.0 | 35.31 | 34.69 | 0.54 | 0.46 |
| (M60) | 5.5 | 19.0 | 60.0 | 59.54 | 90.0 | 89.13 | 103.9 | 100.72 | --- | --- | --- | 67.0 | 3.5 | 2.0 | 38.31 | 37.69 | 0.54 | 0.46 |
| M64 | 6 | 21.0 | 64.0 | 63.54 | 95.0 | 94.13 | 109.9 | 106.72 | --- | --- | --- | 71.0 | 3.5 | 2.0 | 40.31 | 39.69 | 0.54 | 0.46 |
| (M68) | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | 75.0 | 3.5 | 2.0 | 43.31 | 42.69 | 0.54 | 0.46 |
|
A true radius is not essential providing that the curve in smooth and lives wholly within the maximum radius, determined from the maximum transitional diameter and the minimum radius specified. |
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Tolerances on the standard nomial length of bolts and screws
| Nomial length / |
Tolerance | Nomail length / |
Tolerance |
|---|---|---|---|
| 5 | ±0.24 | 90 | ±0.70 |
| 6 | ±0.24 | (95) | ±0.70 |
| (7) | ±0.29 | 100 | ±0.70 |
| 8 | ±0.29 | (105) | ±0.70 |
| (9) | ±0.29 | 110 | ±0.70 |
| 10 | ±0.29 | (115) | ±0.70 |
| (11) | ±0.35 | 120 | ±0.70 |
| 12 | ±0.35 | (125) | ±0.80 |
| 14 | ±0.35 | 130 | ±0.80 |
| 16 | ±0.35 | 140 | ±0.80 |
| (18) | ±0.35 | 150 | ±0.80 |
| 20 | ±0.42 | 160 | ±0.80 |
| (22) | ±0.42 | 170 | ±0.80 |
| 25 | ±0.42 | 180 | ±0.80 |
| (28) | ±0.42 | 190 | ±0.925 |
| 30 | ±0.42 | 200 | ±0.925 |
| (32) | ±0.50 | 220 | ±0.925 |
| 35 | ±0.50 | 240 | ±0.925 |
| (38) | ±0.50 | 260 | ±1.05 |
| 40 | ±0.50 | 280 | ±1.05 |
| 45 | ±0.50 | 300 | ±1.05 |
| 50 | ±0.50 | 325 | ±1.15 |
| 55 | ±0.60 | 350 | ±1.15 |
| 60 | ±0.60 | 375 | ±1.15 |
| 65 | ±0.60 | 400 | ±1.15 |
| 70 | ±0.60 | 425 | ±1.25 |
| 75 | ±0.60 | 450 | ±1.25 |
| 80 | ±0.60 | 475 | ±1.25 |
| 85 | ±0.70 | 500 | ±1.25 |
Note: 1 Length shown in brackets are non-preferred.
Note: 2 See also Annex D.
