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ISO 8676 – 1999 – Bu lông lục giác

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ISO 8676 – 1999 – Bu lông lục giác

Screw Thread					M8	M10	(M10)	M12	(M12)	(M14)	M16	(M18)	M20	(M20)	(M22)	M24
P		Pitch			1	1	1.25	1.5	1.25	1.5	1.5	1.5	1.5	2	1.5	2
a		max			3	3	4	4.5	4	4.5	4.5	4.5	4.5	6	4.5	6
a		min			1	1	1.25	1.5	1.25	1.5	1.5	1.5	1.5	2	1.5	2
c		max			0.6	0.6	0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8	0.8
c		min			0.15	0.15	0.15	0.15	0.15	0.15	0.2	0.2	0.2	0.2	0.2	0.2
d_a		max			9.2	11.2	11.2	13.7	13.7	15.7	17.7	20.2	22.4	22.4	24.4	26.4
d_w		Gread A	min		11.63	14.63	14.63	16.63	16.63	19.64	22.49	25.34	28.19	28.19	31.71	33.61
d_w		Gread B	min		11.47	14.47	14.47	16.47	16.47	19.15	22	24.85	27.7	27.7	31.35	33.25
e		Gread A	min		14.38	17.77	17.77	20.03	20.03	23.36	26.75	30.14	33.53	33.53	37.72	39.98
e		Gread B	min		14.2	17.59	17.59	19.85	19.85	22.78	26.17	29.56	32.95	32.95	37.29	39.55
k		Nominal Size			5.3	6.4	6.4	7.5	7.5	8.8	10	11.5	12.5	12.5	14	15
		Gread A	max		5.45	6.58	6.58	7.68	7.68	8.98	10.18	11.715	12.715	12.715	14.215	15.215
		Gread A	min		5.15	6.22	6.22	7.32	7.32	8.62	9.82	11.285	12.285	12.285	13.785	14.785
		Gread B	max		5.54	6.69	6.69	7.79	7.79	9.09	10.29	11.85	12.85	12.85	14.35	15.35
		Gread B	min		5.06	6.11	6.11	7.21	7.21	8.51	9.71	11.15	12.15	12.15	13.65	14.65
k₁		Gread A	min		3.61	4.35	4.35	5.12	5.12	6.03	6.87	7.9	8.6	8.6	9.65	10.35
k₁		Gread B	min		3.54	4.28	4.28	5.05	5.05	5.96	6.8	7.81	8.51	8.51	9.56	10.26
r		min			0.4	0.4	0.4	0.6	0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8
s		max=nominal size			13	16	16	18	18	21	24	27	30	30	34	36
		Gread A	min		12.73	15.73	15.73	17.73	17.73	20.67	23.67	26.67	29.67	29.67	33.38	35.38
		Gread B	min		12.57	15.57	15.57	17.57	17.57	20.16	23.16	26.16	29.16	29.16	33	35

Screw Thread					(M27)	M30	(M33)	M36	(M39)	M42	(M45)	M48	(M52)	M56	(M60)	M64
P		Pitch			2	2	2	3	3	3	3	3	4	4	4	4
a		max			6	6	6	9	9	9	9	9	12	12	12	12
a		min			2	2	2	3	3	3	3	3	4	4	4	4
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	45.6	48.6	52.6	56.6	63	67	71
d_w		Gread A	min		–	–	–	–	–	–	–	–	–	–	–	–
d_w		Gread B	min		38	42.75	46.55	51.11	55.86	59.95	64.7	69.45	74.2	78.66	83.41	88.16
e		Gread A	min		–	–	–	–	–	–	–	–	–	–	–	–
e		Gread B	min		45.2	50.85	55.37	60.79	66.44	71.3	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
		Gread A	max		–	–	–	–	–	–	–	–	–	–	–	–
		Gread A	min		–	–	–	–	–	–	–	–	–	–	–	–
		Gread B	max		17.35	19.12	21.42	22.92	25.42	26.42	28.42	30.42	33.5	35.5	38.5	40.5
		Gread B	min		16.65	18.28	20.58	22.08	24.58	25.58	27.58	29.58	32.5	34.5	37.5	39.5
k₁		Gread A	min		–	–	–	–	–	–	–	–	–	–	–	–
k₁		Gread B	min		11.66	12.8	14.41	15.46	17.21	17.91	19.31	20.71	22.75	24.15	26.25	27.65
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
		Gread A	min		–	–	–	–	–	–	–	–	–	–	–	–
		Gread B	min		40	45	49	53.8	58.8	63.1	68.1	73.1	78.1	82.8	87.8	92.8

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