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GB /T 5788 – 1986 – Bu lông liền long đen

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Mô tả

GB /T 5788 – 1986 – Bu lông liền long đen

Screw Thread			M5	M6	M8	M10	M12	(M14)	M16
P	Pitch		0.8	1	1.25	1.5	1.75	2	2
b	L≤125		16	18	22	26	30	34	38
	125＜L≤200		–	–	28	32	36	40	44
	L＞200		–	–	–	–	–	–	57
c	min		1	1.1	1.2	1.5	1.8	2.1	2.4
d_a	Type A	max	5.7	6.8	9.2	11.2	13.7	15.7	17.7
d_a	Type B	max	6.2	7.4	10	12.6	15.2	17.7	20.7
d_c	max		11.4	13.6	17	20.8	24.7	28.6	32.8
d_s	max		5	6	8	10	12	14	16
d_s	min		4.82	5.82	7.78	9.78	11.73	13.73	15.73
d_u	max		5.5	6.6	9	11	13.5	15.5	17.5
d_w	min		9.4	11.6	14.9	18.7	22.6	26.4	30.6
e	min		7.44	8.56	10.8	14.08	16.32	19.68	22.94
f	max		1.4	2	2	2	3	3	3
k	max		5.6	6.8	8.5	9.7	11.9	12.9	15.1
k₁	min		2.3	2.9	3.8	4.3	5.4	5.6	6.7
r₁	min		0.2	0.25	0.4	0.4	0.6	0.6	0.6
r₂	max		0.3	0.4	0.5	0.6	0.7	0.9	1
r₃	min		0.1	0.1	0.15	0.2	0.25	0.3	0.35
r₄	Ref.		3	3.4	4.3	4.3	6.4	6.4	6.4
s	max		7	8	10	13	15	18	21
s	min		6.64	7.64	9.64	12.57	14.57	17.57	20.48
t	max		0.15	0.2	0.25	0.3	0.35	0.45	0.5
t	min		0.05	0.05	0.1	0.15	0.15	0.2	0.25
Length of Thread b			–	–	–	–	–	–	–

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