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GB 5783 – 1986 – Bu lông lục giác

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GB 5783 – 1986 – Bu lông lục giác

Thread Size				M3	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24
a		max		1.5	2.1	2.4	3	3.75	4.5	5.25	6	6	7.5	7.5	7.5	9
a		min		–	–	–	–	–	–	–	2	–	2.5	–	2.5	–
c		max		0.4	0.4	0.5	0.5	0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8
c		min		0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.2	0.2	0.2	0.2	0.2
d_a		max		3.6	4.7	5.7	6.8	9.2	11.2	13.7	15.7	17.7	20.2	22.4	24.4	26.4
d_w		Grade A	min	4.6	5.9	6.9	8.9	11.6	14.6	16.6	19.6	22.5	25.3	28.2	31.7	33.6
d_w		Grade B	min	–	–	6.7	8.7	11.4	14.4	16.4	19.2	22	24.8	27.7	31.4	33.2
e		Grade A	min	6.07	7.66	8.79	11.05	14.38	17.77	20.03	23.35	26.75	30.14	33.53	37.72	39.98
e		Grade B	min	–	–	8.63	10.89	14.2	17.59	19.85	22.78	26.17	29.56	32.95	37.29	39.55
k		Nominal Size		2	2.8	3.5	4	5.3	6.4	7.5	8.8	10	11.5	12.5	14	15
		Grade A	min	1.88	2.68	3.35	3.85	5.15	6.22	7.32	8.62	9.82	11.28	12.28	13.78	14.78
		Grade A	max	2.12	2.92	3.65	4.15	5.45	6.58	7.68	8.98	10.18	11.72	12.72	14.22	15.22
		Grade B	min	–	–	3.26	3.76	5.06	6.11	7.21	8.51	9.71	11.15	12.15	13.65	14.65
		Grade B	max	–	–	3.74	4.24	5.54	6.69	7.79	9.09	10.29	11.85	12.85	14.35	15.35
k₁		Grade A	min	1.3	1.9	2.35	2.7	3.6	4.35	5.12	6	6.9	7.9	8.6	9.6	10.35
k₁		Grade B	min	–	–	2.28	2.63	3.54	4.28	5.05	6	6.8	7.8	8.5	9.5	10.3
r		min		0.1	0.2	0.2	0.25	0.4	0.4	0.6	0.6	0.6	0.6	0.8	1	0.8
s		max=nominal size		5.5	7	8	10	13	16	18	21	24	27	30	34	36
		Grade A	min	5.32	6.78	7.78	9.78	12.73	15.73	17.73	20.67	23.67	26.67	29.67	33.38	35.38
		Grade B	min	–	–	7.64	9.64	12.57	15.57	17.57	20.16	23.16	26.76	29.16	33	35

Thread Size				(M27)	M30	(M33)	M36	(M39)	M42	(M45)	M48	(M52)	M56	(M60)	M64
a		max		9	10.5	10.5	12	12	13.5	13.5	15	15	16.5	16.5	18
a		min		3	–	3.5	–	4	4.5	4.5	5	5	5.5	5.5	6
c		max		0.8	0.8	0.8	0.8	1	1	1	1	1	1	1	1
c		min		0.2	0.2	0.2	0.2	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3
d_a		max		30.4	33.4	36.4	39.4	42.4	48.6	48.6	56.6	56.6	67	67	75
d_w		Grade A	min	–	–	–	–	–	–	–	–	–	–	–	–
d_w		Grade B	min	38	42.7	46.6	51.1	55.9	60.6	64.7	69.4	74.2	78.7	83.41	88.2
e		Grade A	min	–	–	–	–	–	–	–	–	–	–	–	–
e		Grade B	min	45.2	50.85	55.37	60.79	66.44	72.02	76.95	82.6	88.25	93.56	99.21	104.86
k		Nominal Size		17	18.7	21	22.5	25	26	28	30	33	35	38	40
		Grade A	min	–	–	–	–	–	–	–	–	–	–	–	–
		Grade A	max	–	–	–	–	–	–	–	–	–	–	–	–
		Grade B	min	16.65	18.28	20.58	22.08	24.58	24.75	27.58	28.95	32.5	33.75	37.5	38.75
		Grade B	max	17.35	19.12	21.42	22.92	25.42	27.05	28.42	31.05	33.5	36.25	38.5	41.25
k₁		Grade A	min	–	–	–	–	–	–	–	–	–	–	–	–
k₁		Grade B	min	11.7	12.8	14.4	15.5	17.2	17.5	19.3	20.1	22.8	23.6	26.2	27.1
r		min		1	1	1	1	1	1.2	1.2	1.6	1.6	2	2	2
s		max=nominal size		41	46	50	55	60	65	70	75	80	85	90	95
		Grade A	min	–	–	–	–	–	–	–	–	–	–	–	–
		Grade B	min	40	45	49	53.8	58.8	63.8	68.1	73.1	78.1	82.8	87.8	92.8

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