公制粗牙螺紋 - ThreadTableApp

螺紋下孔徑表 (公制粗牙螺紋)

螺紋尺寸	鑽頭直徑	下孔徑 (崁合度)	內螺紋小徑
螺紋尺寸	鑽頭直徑	下孔徑 (崁合度)	最小直徑	最大直徑
M 1 × 0.25	0.75	0.78 (80%)	0.729	0.785
1.1 × 0.25	0.85	0.88 (80%)	0.829	0.885
1.2 × 0.25	0.95	0.98 (80%)	0.929	0.985
1.4 × 0.3	1.10	1.14 (80%)	1.075	1.142
1.6 × 0.35	1.25	1.32 (75%)	1.221	1.321
1.8 × 0.35	1.45	1.52 (75%)	1.421	1.521
2 × 0.4	1.60	1.65 (80%)	1.567	1.679
2.2 × 0.45	1.75	1.83 (75%)	1.713	1.838
2.5 × 0.45	2.10	2.13 (75%)	2.013	2.138
3 × 0.5	2.50	2.59 (75%)	2.459	2.599
3.5 × 0.6	2.90	3.01 (75%)	2.850	3.010
4 × 0.7	3.30	3.39 (80%)	3.242	3.422
4.5 × 0.75	3.80	3.85 (80%)	3.688	3.878
5 × 0.8	4.20	4.31 (80%)	4.134	4.334
6 × 1	5.00	5.13 (80%)	4.917	5.153
7 × 1	6.00	6.13 (80%)	5.917	6.153
8 × 1.25	6.80	6.85 (85%)	6.647	6.912
9 × 1.25	7.80	7.85 (85%)	7.647	7.912
10 × 1.5	8.50	8.62 (85%)	8.376	8.676
11 × 1.5	9.50	9.62 (85%)	9.376	9.676
12 × 1.75	10.30	10.40 (85%)	10.108	10.441
14 × 2	12.00	12.2 (85%)	11.835	12.210
16 × 2	14.00	14.2 (85%)	13.835	14.210
18 × 2.5	15.50	15.7 (85%)	15.294	15.744
20 × 2.5	17.50	17.7 (85%)	17.294	17.744
22 × 2.5	19.50	19.2 (85%)	19.294	19.744
24 × 3	21.00	21.2 (85%)	20.752	21.252
27 × 3	24.00	24.2 (85%)	23.752	24.252
30 × 3.5	26.50	26.6 (90%)	26.211	26.771
33 × 3.5	29.50	29.6 (90%)	29.211	29.771
36 × 4	32.00	32.1 (90%)	31.670	32.270
39 × 4	35.00	35.1 (90%)	34.670	35.270
42 × 4.5	37.50	37.6 (90%)	37.129	37.799
45 × 4.5	40.50	40.6 (90%)	40.129	40.799
48 × 5	43.00	43.1 (90%)	42.587	43.297

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