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DIN 931 (-1) – 1987 – Bu lông lục giác

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DIN 931 (-1) – 1987 – Bu lông lục giác

Screw Thread				M1.6	M2	M2.5	M3	(M3.5)	M4	M5	M6	(M7)	M8	M10	M12
P		Thread Pitch		0.35	0.4	0.45	0.5	0.6	0.7	0.8	1	1	1.25	1.5	1.75
b		L≤125		9	10	11	12	13	14	16	18	20	22	26	30
		125＜L≤200		–	–	–	–	–	–	22	24	26	28	32	36
		L＞200		–	–	–	–	–	–	–	–	–	–	45	49
c		min		0.1	0.1	0.1	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15
c		max		0.25	0.25	0.25	0.4	0.4	0.4	0.5	0.5	0.5	0.6	0.6	0.6
d_a		max		2	2.6	3.1	3.6	4.1	4.7	5.7	6.8	7.8	9.2	11.2	13.7
d_s		max=nominal size		1.6	2	2.5	3	3.5	4	5	6	7	8	10	12
		Grade A	min	1.46	1.86	2.36	2.86	3.32	3.82	4.82	5.82	6.78	7.78	9.78	11.73
		Grade B	min	–	–	–	–	–	–	–	–	–	–	–	–
d_w		Grade A	min	2.4	3.2	4.1	4.6	5.1	5.9	6.9	8.9	9.8	11.6	15.6	17.4
d_w		Grade B	min	–	–	–	–	–	–	–	–	–	–	–	–
e		Grade A	min	3.41	4.32	5.45	6.01	6.58	7.66	8.79	11.05	12.12	14.38	18.9	21.1
e		Grade B	min	–	–	–	–	–	–	–	–	–	–	–	–
k		Nominal Size		1.1	1.4	1.7	2	2.4	2.8	3.5	4	4.8	5.3	6.4	7.6
		Grade A	min	0.98	1.28	1.58	1.88	2.28	2.68	3.35	3.85	4.65	5.15	6.22	7.32
		Grade A	max	1.22	1.52	1.82	2.12	2.52	2.92	3.65	4.15	4.95	5.45	6.58	7.68
		Grade B	min	–	–	–	–	–	–	–	–	–	–	–	–
		Grade B	max	–	–	–	–	–	–	–	–	–	–	–	–
k₁		min		0.7	0.9	1.1	1.3	1.6	1.9	2.28	2.63	3.19	3.54	4.28	5.05
r		min		0.1	0.1	0.1	0.1	0.1	0.2	0.2	0.25	0.25	0.4	0.4	0.6
s		max=nominal size		3.2	4	5	5.5	6	7	8	10	11	13	17	19
		Grade A	min	3.02	3.82	4.82	5.32	5.82	6.78	7.78	9.78	10.73	12.73	16.73	18.67
		Grade B	min	–	–	–	–	–	–	–	–	–	–	–	–
Length of Thread b				–	–	–	–	–	–	–	–	–	–	–	–

Screw Thread				(M14)	M16	(M18)	M20	(M22)	M24	(M27)	M30	(M33)	M36	(M39)
P		Thread Pitch		2	2	2.5	2.5	2.5	3	3	3.5	3.5	4	4
b		L≤125		34	38	42	46	50	54	60	66	72	78	84
		125＜L≤200		40	44	48	52	56	60	66	72	78	84	90
		L＞200		53	57	61	65	69	73	79	85	91	97	103
c		min		0.15	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.3
c		max		0.6	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	1
d_a		max		15.7	17.7	20.2	22.4	24.4	26.4	30.4	33.4	36.4	39.4	42.4
d_s		max=nominal size		14	16	18	20	22	24	27	30	33	36	39
		Grade A	min	13.73	15.73	17.73	19.67	21.67	23.67	–	–	–	–	–
		Grade B	min	–	15.57	17.57	19.48	21.48	23.48	26.48	29.48	32.38	35.38	38.38
d_w		Grade A	min	20.5	22.6	25.3	28.2	30	33.6	–	–	–	–	–
d_w		Grade B	min	–	22	24.8	27.7	29.5	33.2	38	42.7	46.6	51.1	55.9
e		Grade A	min	24.49	26.75	30.14	33.53	35.72	39.98	–	–	–	–	–
e		Grade B	min	–	26.17	29.56	32.95	35.03	39.55	45.2	50.85	55.37	60.79	66.44
k		Nominal Size		8.8	10	11.5	12.5	14	15	17	18.7	21	22.5	25
		Grade A	min	8.62	9.82	11.28	12.28	13.78	14.78	–	–	–	–	–
		Grade A	max	8.98	10.18	11.72	12.72	14.22	15.22	–	–	–	–	–
		Grade B	min	–	9.71	11.15	12.15	13.65	14.65	16.65	18.28	20.58	22.08	24.58
		Grade B	max	–	10.29	11.85	12.85	14.35	15.35	17.35	19.12	21.42	22.92	25.42
k₁		min		5.96	6.8	7.8	8.5	9.6	10.3	11.7	12.8	14.4	15.5	17.2
r		min		0.6	0.6	0.6	0.8	0.8	0.8	1	1	1	1	1
s		max=nominal size		22	24	27	30	32	36	41	46	50	55	60
		Grade A	min	21.67	23.67	26.67	29.67	31.61	35.38	–	–	–	–	–
		Grade B	min	–	23.16	26.16	29.16	31	35	40	45	49	53.8	58.8
Length of Thread b				–	–	–	–	–	–	–	–	–	–	–

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