GB/T31.1 外六角全牙螺栓 材質(zhì)、等級：8.8級、10.9級、12.9級 、A2-70、A4-70 、A4-80等

表面處理：鍍普通藍白鋅、普通彩鋅、熱鍍鋅、環(huán)保彩鋅、環(huán)保藍白鋅、環(huán)保達克羅等

鹽霧時間：可做72H、96H、120H、300H、360H、720H等高鹽霧處理

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Nominal Diameter			M6	M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24	(M27)	M30	M36	M42	M48
P	Pitch		1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3	3.5	4	4.5	5
b	L≤125		18	22	26	30	34	38	42	46	50	54	60	66	/	/	/
	125＜L≤200		24	28	32	36	40	44	48	52	56	60	66	72	84	96	108
	L＞200		37	41	45	49	53	57	61	65	69	73	79	85	97	109	121
ds	max=nominal size		6	8	10	12	14	16	18	20	22	24	27	30	36	42	48
	min	Grade A	5.82	7.78	9.78	11.73	13.73	15.73	17.73	19.67	21.67	23.67	/	/	/	/	/
		Grade B	5.7	7.64	9.64	11.57	13.57	15.57	17.57	19.48	21.48	23.48	26.48	29.48	35.38	41.38	47.38
e	min	Grade A	11.05	14.38	17.77	20.03	23.36	26.75	30.14	33.53	37.72	39.98	/	/	/	/	/
		Grade B	10.89	14.2	17.59	19.85	22.78	26.17	29.56	32.95	37.29	39.55	45.2	50.85	60.79	71.3	82.6
k	Nominal Size		4	5.3	6.4	7.5	8.8	10	11.5	12.5	14	15	17	18.7	22.5	26	30
	Grade A	max	3.85	5.15	6.22	7.32	8.62	9.82	11.285	12.285	13.785	14.785	/	/	/	/	/
		min	4.15	5.45	6.58	7.68	8.98	10.18	11.715	12.715	14.215	15.215	/	/	/	/	/
	Grade B	max	4.24	5.54	6.69	7.79	9.09	10.29	11.85	12.85	14.35	15.35	17.35	19.12	22.92	26.42	30.42
		min	3.76	5.06	6.11	7.21	8.51	9.71	11.15	12.15	13.65	14.65	13.65	18.28	22.08	25.58	29.58
s	max=nominal size		10	13	16	18	21	24	27	30	34	36	41	46	55	65	75
	min	Grade A	9.78	12.73	15.73	17.73	20.67	23.67	26.67	29.67	33.38	35.38	/	/	/	/	/
		Grade B	9.64	12.57	15.57	17.57	20.16	23.16	26.16	29.16	33	35	40	45	53.8	63.1	73.1
L1	Nominal Size		3.3	4	5	6	6.5	7	8	8	9	10	10	12	13	15	16
d1	max		1.85	2.25	2.75	3.5	3.5	4.3	4.3	4.3	5.3	5.3	5.3	6.66	6.66	8.36	8.36
	min		1.6	2	2.5	3.2	3.2	4	4	4	5	5	5	6.3	6.3	8	8