d | | b1 | 公称 | 最小值 | 值 | | 值 | UNC,NC-5 | UNF | 8UN | b | 最小值 | L≤10 | 10<L≤16 | L>16 | ds | 粗杆(值) | ds | 粗杆(最小值) | UNC | UNF | 8UN | ds1 | 细杆(值) | UNC | UNF | 8UN | ds1 | 细杆(最小值) | UNC | UNF | 8UN | | 0.2500 | 0.3125 | 0.3750 | 0.4375 | 0.5000 | 0.5625 | 0.6250 | 0.7500 | 0.8750 | 0.375 | 0.469 | 0.563 | 0.656 | 0.750 | 0.844 | 0.938 | 1.125 | 1.313 | 0.350 | 0.440 | 0.532 | 0.620 | 0.708 | 0.802 | 0.892 | 1.075 | 1.258 | 0.400 | 0.498 | 0.594 | 0.692 | 0.792 | 0.896 | 0.983 | 1.175 | 1.368 | 0.100 | 0.111 | 0.125 | 0.143 | 0.154 | 0.167 | 0.182 | 0.200 | 0.222 | 0.071 | 0.083 | 0.083 | 0.100 | 0.100 | 0.111 | 0.111 | 0.125 | 0.143 | - | - | - | - | - | - | - | - | - | 0.750 | 0.875 | 1.000 | 1.125 | 1.250 | 1.375 | 1.500 | 1.750 | 2.000 | 1.000 | 1.125 | 1.250 | 1.375 | 1.500 | 1.625 | 1.750 | 2.000 | 2.250 | 1.500 | 1.625 | 1.750 | 1.875 | 2.000 | 2.125 | 2.250 | 2.500 | 2.750 | 0.2500 | 0.3125 | 0.3750 | 0.4375 | 0.5000 | 0.5625 | 0.6250 | 0.7500 | 0.8750 | 0.241 | 0.303 | 0.364 | 0.426 | 0.488 | 0.550 | 0.611 | 0.735 | 0.859 | 0.243 | 0.304 | 0.367 | 0.428 | 0.491 | 0.552 | 0.615 | 0.739 | 0.863 | - | - | - | - | - | - | - | - | - | 0.241 | 0.303 | 0.364 | 0.426 | 0.488 | 0.550 | 0.611 | 0.735 | 0.859 | 0.243 | 0.304 | 0.367 | 0.428 | 0.491 | 0.552 | 0.615 | 0.739 | 0.863 | - | - | - | - | - | - | - | - | - | 0.213 | 0.271 | 0.329 | 0.385 | 0.444 | 0.502 | 0.559 | 0.677 | 0.795 | 0.223 | 0.281 | 0.343 | 0.400 | 0.462 | 0.521 | 0.583 | 0.703 | 0.822 | - | - | - | - | - | - | - | - | - | |