ねじ下穴径表:メートルねじ(ハイロールタップ)用
溝なしタップの下穴径は、ワークにより遅延性が違うので、ねじ立て後の内径精度をご確認の上、ご選定ください。
単位(mm) | ||||
ねじの呼び | 1級ねじ用下穴径 | 2級ねじ用下穴径 | ||
---|---|---|---|---|
RH精度 | 最小~最大 | RH精度 | 最小~最大 | |
M1×0.25 | 2 | 0.858~0.879 | 4 | 0.858~0.887 |
M1.2×0.25 | 2 | 1.058~1.079 | 4 | 1.058~1.087 |
M1.4×0.3 | 2 | 1.23~1.26 | 4 | 1.23~1.26 |
M1.6×0.35 | 2 | 1.40~1.44 | 4 | 1.4~1.45 |
M1.7×0.35 | – | 1.50~1.54 | 4 | 1.5~1.55 |
M1.8×0.35 | 2 | 1.60~1.64 | 4 | 1.6~1.65 |
M2×0.4 | 2 | 1.77~1.82 | 4 | 1.77~1.82 |
M2×0.25 | 2 | 1.858~1.887 | – | – |
M2.3×0.4 | – | 2.07~2.12 | 4 | 2.07~2.13 |
M2.5×0.45 | 3 | 2.24~2.3 | 5 | 2.24~2.31 |
M2.6×0.45 | – | 2.34~2.4 | 5 | 2.34~2.41 |
M3×0.6 | 3 | 2.72~2.73 | 5 | 2.66~2.73 |
M3×0.5 | 5 | 2.72~2.77 | 6 | 2.72~2.78 |
M3×0.35 | 3 | 2.8~2.84 | 5 | 2.80~2.85 |
M3.5×0.6 | 3 | 3.16~3.21 | 5 | 3.16~3.25 |
M4×0.75 | 3 | 3.57~3.64 | 6 | 3.57~3.64 |
M4×0.7 | 6 | 3.6~3.66 | 7 | 3.6~3.66 |
M4×0.5 | 3 | 3.71~3.77 | 6 | 3.71~3.79 |
M5×0.9 | 3 | 4.49~4.59 | 7 | 4.49~4.59 |
M5×0.8 | 3 | 4.55~4.62 | 8 | 4.55~4.64 |
M5×0.5 | 3 | 4.72~4.77 | 6 | 4.72~4.79 |
M6×1 | 4 | 5.43~5.52 | 7 | 5.43~5.55 |
M6×0.75 | 3 | 5.57~5.64 | 7 | 5.57~5.66 |