ねじ下穴径表:ユニファイねじ(ニューロールタップ)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 | 2B級ねじ用下穴径 | 3B級ねじ用下穴径 | ||
---|---|---|---|---|
RH精度 | 最小~最大 | RH精度 | 最小~最大 | |
No. 0‐80UNF | 3 | 1.38~1.41 | 2 | 1.36~1.4 |
No. 1‐64UNC | 3 | 1.66~1.7 | 2 | 1.65~1.69 |
No. 1‐72UNF | 3 | 1.68~1.72 | 2 | 1.67~1.71 |
No. 2‐56UNC | 4 | 1.96~2.02 | 3 | 1.95~2.01 |
No. 2‐64UNF | 3 | 1.98~2.04 | 2 | 1.97~2.03 |
No. 3‐48UNC | 4 | 2.25~2.32 | 3 | 2.23~2.31 |
No. 3‐56UNF | 4 | 2.29~2.35 | 3 | 2.28~2.34 |
No. 4‐40UNC | 5 | 2.52~2.6 | 3 | 2.5~2.58 |
No. 4‐48UNF | 4 | 2.57~2.64 | 3 | 2.56~2.63 |
No. 5‐40UNC | 5 | 2.86~2.93 | 3 | 2.83~2.91 |
No. 5‐44UNF | 5 | 2.89~2.96 | 3 | 2.87~2.94 |
No. 6‐32UNC | 5 | 3.09~3.17 | 3 | 3.06~3.14 |
No. 6‐40UNF | 5 | 3.19~3.26 | 3 | 3.16~3.22 |
No. 8‐32UNC | 5 | 3.75~3.83 | 4 | 3.74~3.82 |
No. 8‐36UNF | 5 | 3.8~3.88 | 4 | 3.79~3.86 |
No.10‐24UNC | 6 | 4.26~4.35 | 4 | 4.24~4.32 |
No.10‐32UNF | 5 | 4.41~4.48 | 4 | 4.4~4.46 |
No.12‐24UNC | 6 | 4.92~5.01 | 4 | 4.9~4.96 |
No.12‐28UNF | 5 | 5~5.08 | 4 | 4.99~5.06 |
1/4‐20UNC | 6 | 5.66~5.76 | 4 | 5.64~5.74 |
1/4‐28UNF | 5 | 5.86~5.93 | 4 | 5.85~5.92 |
5/16‐18UNC | 7 | 7.18~7.29 | 5 | 7.15~7.24 |
5/16‐24UNF | 6 | 7.38~7.46 | 5 | 7.36~7.43 |
3/8‐16UNC | 7 | 8.66~8.78 | 5 | 8.63~8.73 |
3/8‐24UNF | 6 | 8.96~9.05 | 5 | 8.95~90.2 |
7/16‐14UNC | 7 | 10.11~10.25 | 5 | 10.08~10.19 |
7/16‐20UNF | 7 | 10.44~10.54 | 5 | 10.41~10.49 |
1/2‐13UNC | 8 | 11.62~11.78 | 6 | 11.6~11.68 |
1/2‐20UNF | 7 | 12.02~12.12 | 5 | 12~12.05 |
9/16‐12UNC | 10 | 13.14~13.27 | 8 | 13.11~13.24 |
9/16‐18UNF | 9 | 13.55~13.66 | 7 | 13.53~13.58 |
5/8‐11UNC | 11 | 14.62~14.76 | 8 | 14.58~14.67 |
5/8‐18UNF | 9 | 15.14~15.25 | 7 | 15.11~15.17 |
3/4‐10UNC | 12 | 17.67~17.88 | 9 | 17.63~17.74 |
3/4‐16UNF | 10 | 18.22~18.32 | 7 | 18.18~18.25 |
7/8‐ 9UNC | 12 | 20.68~20.85 | 9 | 20.64~20.75 |
7/8‐14UNF | 11 | 21.27~21.38 | 8 | 21.23~21.27 |
1 ‐ 8UNC | 13 | 23.65~23.84 | 10 | 23.61~23.74 |
1 ‐12UNF | 12 | 24.28~24.41 | 9 | 24.24~24.32 |