GOST 1491-80 Cheese-Head Screws, Product Grades A and B. Design and Dimensions
GOST 1491-80 · Screws
This is an informational translation of a Russian national standard. The Russian original is authoritative.
GOST 1491-80 applies to cheese-head screws, product grades A and B, with a nominal thread diameter from 1 to 20 mm. The standard fully complies with ST SEV 2653-80.
| CHEESE-HEAD SCREWS, PRODUCT GRADES A AND B Design and dimensions Cheese-head screws, product grades A and B. Design and dimensions | GOST 1491-80 Supersedes GOST 1491-72 |
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The design and dimensions of screws shall conform to those specified in Tables 1, 2 and the drawing.
Table 1, mm
| Nominal thread diameter d | 1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread pitch P | coarse | 0.25 | 0.25 | 0.3 | 0.35 | 0.4 | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 |
| fine | - | - | - | - | - | - | - | - | - | - | - | 1 | 1.25 | 1.25 | 1.5 | 1.5 | 1.5 | 1.5 | |
| Head diameter D | 2.0 | 2.3 | 2.6 | 3.0 | 3.8 | 4.5 | 5.5 | 6.0 | 7.0 | 8.5 | 10.0 | 13.0 | 16.0 | 18.0 | 21.0 | 24.0 | 27.0 | 30.0 | |
| Head height k | 0.7 | 0.8 | 0.9 | 1.0 | 1.3 | 1.6 | 2.0 | 2.4 | 2.6 | 3.3 | 3.9 | 5.0 | 6.0 | 7.0 | 8.0 | 9.0 | 10.0 | 11.0 | |
| Thread length b | extended | - | - | - | - | 16 | 18 | 19 | 20 | 22 | 25 | 28 | 34 | 40 | 46 | 52 | 58 | 64 | 70 |
| normal | 8 | 9 | 9 | 9 | 10 | 11 | 12 | 13 | 14 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 42 | 46 |
Table 2, mm
| Screw lengthl | Nominal thread diameter d | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | |
| 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | |||||
| (2.5) | - | - | - | - | - | - | - | - | - | - | - | - | - | |||||
| 3 | - | - | - | - | - | - | - | - | - | - | - | |||||||
| (3.5) | - | - | - | - | - | - | - | - | - | - | - | |||||||
| 4 | - | - | - | - | - | - | - | - | - | |||||||||
| 5 | - | - | - | - | - | - | - | - | - | |||||||||
| 6 | - | - | - | - | - | - | - | - | ||||||||||
| (7) | - | - | - | - | - | - | - | |||||||||||
| 8 | Standard lengths | - | - | - | - | - | - | - | ||||||||||
| 9 | - | - | - | - | - | - | - | |||||||||||
| 10 | - | - | - | - | - | - | - | |||||||||||
| 11 | - | - | - | - | - | - | - | - | ||||||||||
| 12 | - | - | - | - | - | - | - | |||||||||||
| (13) | - | - | - | - | - | - | - | - | - | |||||||||
| 14 | - | - | - | - | - | - | - | - | - | |||||||||
| 16 | - | - | - | - | - | - | - | - | - | |||||||||
| (18) | - | - | - | - | - | - | - | - | ||||||||||
| 20 | - | - | - | - | - | - | - | - | ||||||||||
| (22) | - | - | - | - | - | - | - | - | - | |||||||||
| 25 | - | - | - | - | - | - | - | - | ||||||||||
| (28) | - | - | - | - | - | - | - | - | - | |||||||||
| 30 | - | - | - | - | - | - | - | - | ||||||||||
| (32) | - | - | - | - | - | - | - | - | - | |||||||||
| 35 | - | - | - | - | - | - | - | Standard lengths | - | |||||||||
| (38) | - | - | - | - | - | - | - | - | - | |||||||||
| 40 | - | - | - | - | - | - | - | - | ||||||||||
| (42) | - | - | - | - | - | - | - | - | - | |||||||||
| 45 | - | - | - | - | - | - | - | - | - | |||||||||
| (48) | - | - | - | - | - | - | - | - | - | |||||||||
| 50 | - | - | - | - | - | - | - | - | - | |||||||||
| 55 | - | - | - | - | - | - | - | - | - | - | ||||||||
| 60 | - | - | - | - | - | - | - | - | - | - | ||||||||
| 65 | - | - | - | - | - | - | - | - | - | - | - | |||||||
| 70 | - | - | - | - | - | - | - | - | - | - | - | |||||||
| 75 | - | - | - | - | - | - | - | - | - | - | - | |||||||
| 80 | - | - | - | - | - | - | - | - | - | - | - | |||||||
| (85) | - | - | - | - | - | - | - | - | - | - | - | - | ||||||
| 90 | - | - | - | - | - | - | - | - | - | - | - | - | ||||||
| (95) | - | - | - | - | - | - | - | - | - | - | - | - | ||||||
| 100 | - | - | - | - | - | - | - | - | - | - | - | - | ||||||
| 110 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| 120 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Notes:
-
Screw lengths given in brackets are not recommended for use.
-
The extended thread length is preferred.
-
Screws with a shank length less than the thread length, including the incomplete thread run-out, shall be manufactured with thread along the entire length of the shank.
* For screws machined by cutting; not standardized in other cases.
Example of a designation for a cheese-head screw of product grade A, with thread diameter d = 8 mm, coarse thread pitch, thread tolerance class 6g, length l = 50 mm, normal thread length b = 22 mm, property class 4.8, without coating:
Screw A.M8-6g×50.48 GOST 1491-80
The same, product grade B, with fine thread pitch, extended thread length b = 34 mm, with a 6 µm zinc coating, chromated:
Screw B.M8×1-6g×50-34.48.016 GOST 1491-80
The diameter of the plain part d₁ shall be equal to the outer diameter of the thread or equal to the shank diameter for rolling metric thread per GOST 19256-73.
By agreement between the customer and the manufacturer, screws may be manufactured with lengths not specified in Table 2.
Thread — per GOST 24705-81. Thread run-out and incomplete thread — per GOST 10549-80.
Recesses — per GOST 24669-81.
Radius under head — per GOST 24670-81.
Tolerances, methods for inspection of dimensions and deviations in form and position of surfaces — per GOST 1759.1-82.
Surface defects and inspection methods — per GOST 1759.2-82.
Technical requirements — per GOST 1759.0-87.
Theoretical mass of screws is given in Appendix 1.
Appendix 1 (informative). Theoretical mass of screws
| Screw length l, mm | Mass of 1000 pcs of steel screws with coarse thread pitch, kg, at nominal thread diameter d, mm | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | |
| 2 | 0.024 | 0.037 | 0.053 | 0.073 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 2.5 | 0.027 | 0.040 | 0.057 | 0.079 | 0.151 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 3 | 0.029 | 0.044 | 0.061 | 0.084 | 0.160 | 0.272 | 0.470 | - | - | - | - | - | - | - | - | - | - | - |
| 3.5 | 0.031 | 0.047 | 0.066 | 0.090 | 0.169 | 0.286 | 0.492 | - | - | - | - | - | - | - | - | - | - | - |
| 4 | 0.033 | 0.050 | 0.070 | 0.096 | 0.178 | 0.301 | 0.513 | 0.727 | 1.022 | - | - | - | - | - | - | - | - | - |
| 5 | 0.037 | 0.057 | 0.079 | 0.107 | 0.196 | 0.330 | 0.557 | 0.785 | 1.098 | - | - | - | - | - | - | - | - | - |
| 6 | 0.042 | 0.064 | 0.088 | 0.118 | 0.214 | 0.360 | 0.600 | 0.844 | 1.175 | 2.078 | - | - | - | - | - | - | - | - |
| 7 | 0.046 | 0.070 | 0.097 | 0.129 | 0.232 | 0.389 | 0.643 | 0.902 | 1.251 | 2.200 | 3.394 | - | - | - | - | - | - | - |
| 8 | 0.050 | 0.077 | 0.106 | 0.141 | 0.250 | 0.418 | 0.687 | 0.961 | 1.328 | 2.322 | 3.569 | - | - | - | - | - | - | - |
| 9 | 0.055 | 0.084 | 0.115 | 0.152 | 0.268 | 0.448 | 0.730 | 1.019 | 1.404 | 2.445 | 3.743 | - | - | - | - | - | - | - |
| 10 | 0.059 | 0.090 | 0.124 | 0.163 | 0.286 | 0.477 | 0.773 | 1.078 | 1.481 | 2.567 | 3.918 | - | - | - | - | - | - | - |
| 11 | - | 0.097 | 0.133 | 0.174 | 0.304 | 0.506 | 0.816 | 1.136 | 1.557 | 2.689 | 4.093 | - | - | - | - | - | - | - |
| 12 | - | 0.104 | 0.142 | 0.186 | 0.322 | 0.535 | 0.860 | 1.195 | 1.634 | 2.811 | 4.267 | 8.516 | - | - | - | - | - | - |
| 13 | - | - | - | 0.197 | 0.340 | 0.565 | 0.903 | 1.254 | 1.710 | 2.933 | 4.442 | 8.831 | - | - | - | - | - | - |
| 14 | - | - | - | 0.208 | 0.358 | 0.594 | 0.946 | 1.312 | 1.786 | 3.056 | 4.617 | 9.146 | - | - | - | - | - | - |
| 16 | - | - | - | 0.231 | 0.394 | 0.653 | 1.033 | 1.429 | 1.932 | 3.300 | 4.966 | 9.777 | - | - | - | - | - | - |
| 18 | - | - | - | - | 0.431 | 0.711 | 1.120 | 1.546 | 2.092 | 3.544 | 5.315 | 10.408 | 17.59 | 25.64 | - | - | - | - |
| 20 | - | - | - | - | 0.468 | 0.770 | 1.206 | 1.663 | 2.245 | 3.789 | 5.664 | 11.040 | 18.58 | 27.08 | - | - | - | - |
| 22 | - | - | - | - | - | 0.829 | 1.293 | 1.780 | 2.398 | 4.033 | 6.014 | 11.670 | 19.58 | 28.53 | - | - | - | - |
| 25 | - | - | - | - | - | 0.917 | 1.423 | 1.956 | 2.627 | 4.400 | 6.537 | 12.617 | 21.08 | 30.70 | 44.68 | - | - | - |
| 28 | - | - | - | - | - | - | 1.553 | 2.132 | 2.857 | 4.766 | 7.061 | 13.563 | 22.57 | 32.87 | 47.64 | - | - | - |
| 30 | - | - | - | - | - | - | 1.640 | 2.249 | 3.010 | 5.011 | 7.411 | 14.194 | 23.57 | 34.32 | 49.62 | 68.70 | - | - |
| 32 | - | - | - | - | - | - | - | 2.366 | 3.162 | 5.255 | 7.760 | 14.824 | 24.57 | 35.77 | 51.60 | 71.35 | - | - |
| 35 | - | - | - | - | - | - | - | 2.541 | 3.392 | 5.622 | 8.284 | 15.771 | 26.06 | 37.94 | 54.57 | 75.33 | 98.76 | - |
| 38 | - | - | - | - | - | - | - | - | 3.621 | 5.988 | 8.808 | 16.717 | 27.56 | 40.11 | 57.53 | 79.31 | 103.70 | - |
| 40 | - | - | - | - | - | - | - | - | 3.774 | 6.232 | 9.157 | 17.348 | 28.56 | 41.56 | 59.51 | 81.96 | 107.00 | 138.2 |
| 42 | - | - | - | - | - | - | - | - | - | 6.477 | 9.506 | 17.979 | 29.55 | 43.01 | 61.49 | 84.62 | 110.29 | 142.3 |
| 45 | - | - | - | - | - | - | - | - | - | 6.844 | 10.031 | 18.925 | 31.05 | 45.18 | 64.46 | 88.60 | 115.23 | 148.5 |
| 48 | - | - | - | - | - | - | - | - | - | 7.210 | 10.554 | 19.872 | 32.55 | 47.35 | 67.43 | 92.57 | 120.17 | 154.7 |
| 50 | - | - | - | - | - | - | - | - | - | 7.454 | 10.904 | 20.503 | 33.54 | 48.80 | 69.40 | 95.22 | 123.47 | 158.9 |
| 55 | - | - | - | - | - | - | - | - | - | - | 11.777 | 22.080 | 36.04 | 52.42 | 74.35 | 101.85 | 131.70 | 169.3 |
| 60 | - | - | - | - | - | - | - | - | - | - | 12.650 | 23.657 | 38.53 | 56.03 | 79.29 | 108.49 | 139.94 | 179.6 |
| 65 | - | - | - | - | - | - | - | - | - | - | - | 25.234 | 41.02 | 59.65 | 84.23 | 115.11 | 148.18 | 190.1 |
| 70 | - | - | - | - | - | - | - | - | - | - | - | 26.811 | 43.52 | 63.27 | 89.18 | 121.75 | 156.41 | 200.4 |
| 75 | - | - | - | - | - | - | - | - | - | - | - | 28.388 | 46.01 | 66.89 | 94.12 | 128.38 | 164.65 | 210.8 |
| 80 | - | - | - | - | - | - | - | - | - | - | - | 29.965 | 48.50 | 70.51 | 99.07 | 135.01 | 172.89 | 221.2 |
| 85 | - | - | - | - | - | - | - | - | - | - | - | - | 51.00 | 74.12 | 104.02 | 141.64 | 181.12 | 231.5 |
| 90 | - | - | - | - | - | - | - | - | - | - | - | - | 53.49 | 77.74 | 108.96 | 148.27 | 189.37 | 241.9 |
| 95 | - | - | - | - | - | - | - | - | - | - | - | - | 55.98 | 81.36 | 113.90 | 154.90 | 197.60 | 252.3 |
| 100 | - | - | - | - | - | - | - | - | - | - | - | - | 58.48 | 84.98 | 118.84 | 161.52 | 205.84 | 262.7 |
| 110 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 222.31 | 283.4 |
| 120 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 304.2 |
Note. To determine the mass of screws made of aluminium alloy, multiply the mass values given in the table by a factor of 0.356; for brass, by 1.08.
Corresponds to DIN 84, ISO 1207.
Estimate for the “GOST 1491-80” category
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