ASME B18.3 TABLE 2A Estándar Dimensiones para Hexagon and spline flat countersunk head cap screws, inch series
Esta norma ha sido cancelada
Tornillos de cabeza avellanada plana con hexágono interior. La cabeza avellanada plana debe tener una superficie superior plana y una superficie de apoyo cónica con un ángulo de aproximadamente 82°.
Dibujos dimensionales y diagramas técnicos
Dimensiones clave y parámetros técnicos
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Dimensions in inches - ASME b18.3Table 2A - 2008- Socket Flat Countersunk Head Cap Screws |
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| d thread size | Nr. of threads x inch | d1 min | b basic thread length | dk max theo.Sharp | k max | t min | S nom | M nom | ||
| inches | mm | UNC | UNF | |||||||
| 0 (0.06) | 1.52 | - | 80 | 0.568 | 0.5 | 0.138 | 0.044 | 0.025 | 0.035 | 0.048 |
| 1 (0.073) | 1.85 | 64 | 72 | 0.07 | 0.62 | 0.168 | 0.054 | 0.031 | 0.05 | 0.06 |
| 2 (0.086) | 2.18 | 56 | 64 | 0.082 | 0.62 | 0.197 | 0.064 | 0.038 | 0.05 | 0.06 |
| 3 0.099) | 2.51 | 48 | 56 | 0.095 | 0.62 | 0.226 | 0.073 | 0.044 | 0.062 | 0.072 |
| 4 (0.112) | 2.84 | 40 | 48 | 0.108 | 0.75 | 0.255 | 0.083 | 0.055 | 0.062 | 0.072 |
| 5 (0.125) | 3.18 | 40 | 44 | 0.12 | 0.75 | 0.281 | 0.90 | 0.061 | 0.078 | 0.096 |
| 6 (0.138) | 3.51 | 32 | 40 | 0.133 | 0.75 | 0.307 | 0.097 | 0.066 | 0.078 | 0.096 |
| 8 (0.164) | 4.17 | 32 | 36 | 0.159 | 0.875 | 0.359 | 0.112 | 0.076 | 0.094 | 0.111 |
| 10 (0.19) | 4.83 | 24 | 32 | 0.184 | 0.875 | 0.411 | 0.127 | 0.087 | 0.125 | 0.145 |
| 1/4 | 6.35 | 20 | 28 | 0.244 | 1 | 0.531 | 0.161 | 0.111 | 0.156 | 0.183 |
| 5/16 | 7.94 | 18 | 24 | 0.305 | 1.125 | 0.656 | 0.198 | 0.135 | 0.188 | 0.216 |
| 3/8 | 9.53 | 16 | 24 | 0.368 | 1.25 | 0.781 | 0.234 | 0.159 | 0.219 | 0.251 |
| 7/16 | 11.11 | 14 | 20 | 0.429 | 1.375 | 0.844 | 0.234 | 0.159 | 0.25 | 0.291 |
| 1/2 | 12.70 | 13 | 20 | 0.492 | 1.5 | 0.938 | 0.251 | 0.172 | 0.312 | 0.372 |
| 5/8 | 15.88 | 11 | 18 | 0.616 | 1.75 | 1.188 | 0.324 | 0.220 | 0.375 | 0.454 |
| 3/4 | 19.05 | 10 | 16 | 0.741 | 2 | 1.438 | 0.396 | 0.220 | 0.5 | 0.454 |
| 7/8 | 22.23 | 9 | 14 | 0.865 | 2.25 | 1.688 | 0.468 | 0.248 | 0.562 | - |
| 1 | 25.40 | 8 | 12 | 0.989 | 2.5 | 1.938 | 0.540 | 0.297 | 0.625 | - |
| 1-1/8 | 28.58 | 7 | 12 | 1.108 | 2.81 | 2.188 | 0.611 | 0.325 | 0.75 | - |
| 1-1/4 | 31.75 | 7 | 12 | 1.233 | 3.12 | 2.438 | 0.683 | 0.358 | 0.875 | - |
| 1-3/8 | 34.93 | 6 | 12 | 1.357 | 3.44 | 2.688 | 0.755 | 0.402 | 0.875 | - |
| 1-1/2 | 38.10 | 6 | 12 | 1.482 | 3.75 | 2.938 | 0.827 | 0.435 | 1 | - |