We have our own surface treatment plant, and the thickness of zinc layer meets the standard requirements. We can make authoritative inspection reports, including surface treatment such as hot galvanizing, Dacromet, electro galvanizing, boiling black, etc.GB series, Q standard series, DIN German standard series, IFI American standard series, BS British standard series, JIS Japanese standard series, ISO international standard series, etc.The material comes from a high-quality steel manufacturer, which can issue an authoritative material inspection report, including Q235, 35 #, 45 #, 345B, 40Cr, 35CrmoA, stainless steel 201, 304 and other special materials.Poland, Russia, Algeria, Egypt, Ghana, Kuwait, the United Arab Emirates, Kazakhstan, Malaysia, Pakistan, the Philippines, South Korea, Myanmar, Thailand, Ukraine, Syria, India, the United States, Turkey, Brazil, Sri Lanka, Norway, etc.One of the standards for hexagon bolts is the level standard, which is divided into 4.8 and 8.8. These two levels are used more frequently in the market. Especially Grade 4.8 outer hexagon bolt. Because it is much cheaper than grade 8.8 hex bolts. Of course, it is more widely used. But for products with high requirements. Because of its high requirements in hardness and other aspects.The outer hexagon screw is a matching nut used to fasten and connect two connected parts with through holes and components. Hex head screws are commonly used bolts. It is more important to use Class A and Class B outer hexagon. In addition, it is often used in the occasion of high assembly accuracy, large impact, vibration or cross rate load. Grade C outer 66 screws are used in situations where the surface is rough and the assembly accuracy is not required.This requires the use of grade 8.8 hex bolts. Grade 8.8 outer hexagon bolt is harder in terms of hardness and screw torque. It is safer to use the product. Faster and more stable.

Thread Size d				M4	M5	M6	(M7)	M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24	(M27)	M30	(M33)
P		Pitch	Coarse thread	0.7	0.8	1	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3	3.5	3.5
			Fine thread-1	/	/	/	/	1	1	1.5	1.5	1.5	1.5	2	1.5	2	2	2	2
			Fine thread-2	/	/	/	/	/	1.25	1.25	/	/	2	1.5	2	/	/	/	/
m		max=nominal size		3.2	4	5	5.5	6.5	8	10	11	13	15	16	18	19	22	24	26
		min		2.9	3.7	4.7	5.2	6.14	7.64	9.64	10.3	12.3	14.3	14.9	16.9	17.7	20.7	22.7	24.7
mw		min		2.32	2.96	3.76	4.16	4.91	6.11	7.71	8.24	9.84	11.44	11.92	13.52	14.16	16.56	18.16	19.76
s		max=nominal size		7	8	10	11	13	17	19	22	24	27	30	32	36	41	46	50
		min		6.78	7.78	9.78	10.73	12.73	16.73	18.67	21.67	23.67	26.16	29.16	31	35	40	45	49
e ①		min		7.66	8.79	11.05	12.12	14.38	18.9	21.1	24.49	26.75	29.56	32.95	35.03	39.55	45.2	50.85	55.37
		*		-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
per 1000 units ≈ kg				0.81	1.23	2.5	3.12	5.2	11.6	17.3	25	33.3	49.4	64.4	79	110	165	223	288
Thread Size d				M36	(M39)	M42	(M45)	M48	(M52)	M56	(M60)	M64	(M68)	M72	(M76)	M80	(M85)	M90	M100
P		Pitch	Coarse thread	4	4	4.5	4.5	5	5	5.5	5.5	6	6	/	/	/	/	/	/
			Fine thread-1	3	3	3	3	3	3	4	4	4	/	6	6	6	6	6	6
			Fine thread-2	/	/	/	/	/	/	/	/	/	4	4	4	4	4	4	4
m		max=nominal size		29	31	34	36	38	42	45	48	51	54	58	61	64	68	72	80
		min		27.4	29.4	32.4	34.4	36.4	40.4	43.4	46.4	49.1	52.1	56.1	59.1	62.1	66.1	70.1	78.1
mw		min		21.92	23.52	25.9	27.5	29.1	32.3	34.7	37.1	39.3	41.7	44.9	47.3	49.7	52.9	56.1	62.5
s		max=nominal size		55	60	65	70	75	80	85	90	95	100	105	110	115	120	130	145
		min		53.8	58.8	63.1	68.1	73.1	78.1	82.8	87.8	92.8	97.8	102.8	107.8	112.8	117.8	127.5	142.5
e ①		min		60.79	66.44	71.3	76.95	82.6	88.25	93.56	99.21	104.86	110.51	116.16	121.81	127.46	133.11	144.08	161.02
		*		-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
per 1000 units ≈ kg				393	502	652	800	977	1220	1420	1690	1980	2300	2670	3040	3440	3930	4930	6820

Based on products with high quality, competitive price, and our full range service, we have accumulated professional strength and experience, and we have built up a very good reputation in the field. Along with the continuous development, we commit ourselves not only to the Chinese domestic business but also the international market. May you moved by our high quality products and passionate service. Let's open a new chapter of mutual benefit and double win.