Диаметр сверл под резьбы

Метрическая резьба

Обозначение резьбы	Шаг резьбы, мм	Диаметр сверла под резьбу, мм	Диаметр отверстия под резьбу с полем допуска, мм
			4H5H; 5H; 5H6H; 6H; 7H	6G; 7G	4H5H; 5H	5H6H; 6H; 6G	7H; 7G
			Номинальный		Предельные отклонения
М1	0.25	0.75	0.75	0.77	+0.04	+0.06	-
М1.1	0.25	0.85	0.85	0.87	+0.04	+0.06	-
М1.2	0.25	0.95	0.95	0.97	+0.04	+0.06	-
М1.4	0.3	1.1	1.1	1.12	+0.04	+0.06	-
М1.6	0.35	1.25	1.25	1.27	+0.05	+0.07	-
М1.8	0.35	1.45	1.45	1.47	+0.05	+0.07	-
М2	0.4	1.6	1.6	1.62	+0.06	+0.08	-
М2.2	0.45	1.75	1.75	1.77	+0.07	+0.09	-
М2.5	0.45	2.05	2.05	2.07	+0.07	+0.09	-
М3	0.5	2.5	2.5	2.52	+0.08	+0.1	+0.14
М3.5	0.6	2.9	2.9	2.93	+0.08	+0.11	+0.15
М4	0.7	3.3	3.3	3.33	+0.08	+0.12	+0.16
М4.5	0.75	3.75	3.7	3.73	+0.09	+0.13	+0.18
М5	0.8	4.2	4.2	4.23	+0.11	+0.17	+0.22
М6	1	5	4.95	5	+0.17	+0.2	+0.26
М7	1	6	5.95	6	+0.17	+0.2	+0.26
М8	1.25	6.8	6.7	6.75	+0.17	+0.2	+0.26
М9	1.25	7.8	7.7	7.75	+0.17	+0.2	+0.26
М10	1.5	8.5	8.43	8.5	+0.19	+0.22	+0.3
М11	1.5	9.5	9.43	9.5	+0.19	+0.22	+0.3
М12	1.75	10.2	10.2	10.25	+0.21	+0.27	+0.36
М14	2	12	11.9	11.95	+0.24	+0.3	+0.4
М16	2	14	13.9	13.95	+0.24	+0.3	+0.4
М18	2.5	15.5	15.35	15.4	+0.3	+0.4	+0.53
М20	2.5	17.5	17.35	17.4	+0.3	+0.4	+0.53
М22	2.5	19.5	19.35	19.4	+0.3	+0.4	+0.53
М24	3	21	20.85	20.9	+0.3	+0.4	+0.53
М27	3	24	23.85	23.9	+0.3	+0.4	+0.53
М30	3.5	26.5	26.3	26.35	+0.36	+0.48	+0.62
М33	3.5	29.5	29.3	29.35	+0.36	+0.48	+0.62
М36	4	32	31.8	31.85	+0.36	+0.48	+0.62
М39	4	35	34.8	34.85	+0.36	+0.48	+0.62
М42	4.5	37.5	37.25	37.3	+0.41	+0.55	+0.73
М45	4.5	40.5	40.25	40.3	+0.41	+0.55	+0.73
М48	5	43	42.7	42.8	+0.45	+0.6	+0.8
М52	5	47	46.7	46.8	+0.45	+0.6	+0.8

Обозначение резьбы	Шаг резьбы, мм	Число ниток на 1 дюйм	Диаметр сверла под резьбу, мм	Диаметр отверстия под резьбу, мм
				Номинальный	Предельные отклонения для классов точности
				Номинальный	A	B
G1/8	0.907	28	8.7	8.62	+0.1	+0.2
G1/4	1.337	19	11.5	11.5	+0.12	+0.25
G3/8	1.337	19	15	15	+0.12	+0.25
G1/2	1.814	14	18.75	18.68	+0.14	+0.28
G5/8	1.814	14	20.75	20.64	+0.14	+0.28
G3/4	1.814	14	24.25	24.17	+0.14	+0.28
G7/8	1.814	14	28	27.93	+0.14	+0.28
G1	2.309	11	30.5	30.34	+0.18	+0.36
G1 1/8	2.309	11	35	35	+0.18	+0.36
G1 1/4	2.309	11	39	39	+0.18	+0.36
G1 3/8	2.309	11	41.5	41.41	+0.18	+0.36
G1 1/2	2.309	11	45	44.9	+0.18	+0.36
G1 3/4	2.309	11	51	50.84	+0.18	+0.36
G2	2.309	11	-	56.7	+0.18	+0.36
G2 1/4	2.309	11	-	62.8	+0.22	+0.43
G2 1/2	2.309	11	-	72.27	+0.22	+0.43
G2 3/4	2.309	11	-	78.62	+0.22	+0.43
G3	2.309	11	-	84.97	+0.22	+0.43
G3 1/4	2.309	11	-	91.07	+0.22	+0.43
G3 1/2	2.309	11	-	97.42	+0.22	+0.43
G3 3/4	2.309	11	-	103.77	+0.22	+0.43
G4	2.309	11	-	110.12	+0.22	+0.43
G4 1/2	2.309	11	-	122.82	+0.22	+0.43
G5	2.309	11	-	135.52	+0.22	+0.43
G5 1/2	2.309	11	-	148.22	+0.22	+0.43
G6	2.309	11	-	160.92	+0.22	+0.43