螺纹底孔直径表.xls

螺纹底孔直径表(切削) 公制粗牙螺纹(切削方式加工) 螺纹尺寸钻头直径嵌合度区分嵌合度区分中(注1)2级(注2) 中(注1)内螺纹小径 2级(注2)最小直径最大直径 M1× (80% ) × (80% ) × (80% ) × (80% ) × (75% ) × (75% ) M2× (80% ) × (75% ) × (75% ) M3× (75% ) × (75% ) M4× (80% ) × (80% ) M5× (80% ) M6× (80% ) M7× (80% ) M8× (85% ) M9× (85% ) M10 × (85% ) M11 × (85% ) M12 × (85% ) M14 × (85% ) M16 × (85% ) M18 × (85% ) M20 × (85% ) M22 × (85% ) M24 × (85% ) M27 × (85% ) M30 × (90% ) M33 × (90% ) M36 × (90% ) M39 × (90% ) M42 × (90% ) M45 × (90% ) M48 × (90% ) 注1) 以下等级:5H, 以上等级 6H。注2)基于 JIS B0209 -1982 标准。※底孔径() 底孔径=D-2×() ×(嵌合率/100) 备注:P:螺距 D:外螺纹大径 螺纹底孔直径表(切削) 注1)等级:6H 公制细牙螺纹(切削方式加工)注2)基于 JIS B0211 -1982 标准。螺纹尺寸钻头直径嵌合度区分嵌合度区分螺纹尺寸钻头直径嵌合度区分嵌合度区分中(注1)2级(注2)中(注1)2级(注2) 中(注1)内螺纹小径中(注1)内螺纹小径 2级(注2)最小直径最大直径 2级(注2)最小直径最大直径 × ( 75% ) M25 ×1 24 ( 80% ) M3× ( 75% ) M26 × ( 85% ) × ( 75% ) M27 ×2 25 ( 85% ) M4× ( 75% ) M27 × ( 85% ) × 4 ( 75% ) M27 ×1