12.9s High Strength Hex Socket Bolt & Hot-DIP Galvanized Round Head Hexagon Bolt/A2-70

• Material: Stainless Steel
• Type: Round Head
• Connection: Hinged Bolts
• Head Style: Round
• Standard: DIN, ANSI, GB, JIS, BSW, GOST
• Grade: 12.9
• Model NO.: M2-M16
• Application: Machinery, Chemical Industry, Environmental, Building
• Finish: Polishing
• Carbon Steel Grade: 4.8 6.8 8.8 10.9 12.9s
• Bolt Material: Carbon Steel, Stainless Steel, High Carbon Steel
• Surface Coating: Galvanized / Hot DIP Galvanized / Black
• Stainless Steel: 201 304 316 316L
• Transport Package: Export Packing
• Specification: Can be customized
• Trademark: SANJU
• Origin: Hebei
• HS Code: 7318151090
• Production Capacity: 100000000

Product Description

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Stainless steel has stainless steel SUS202 hex cylindrical head screws, this is stainless steel ordinary material, there are stainless steel SUS304 hex cylindrical head screws, there are stainless steel SUS316 hex cylindrical head screws. According to the strength of the hex cylindrical head screw, there are 4.8 hex cylindrical head screws, 8.8 hex cylindrical head screws, 10.9 hex cylindrical head screws, and 12.9 hex cylindrical head screws. 8.8-12.9 class hex cylindrical head screws are called high-strength and high-grade hex bolts.
 

The national standard of hexagonal cylindrical head screws is the national standard GB70-1985, there are many specifications and sizes, the common specification standards are 3*8, 3* 10,3 * 12,3 * 16,3 * 20,3 * 25,3 *30, 3*45, 4*8, 4* 10,4 * 12,4 * 16,4 * 20,4 * 25,4 *30, 3*45, 3*8, 4*10, 4*12, 4*16, 4*20, 4*25, 4*30, 4* 35,4 *45, 5* 10,5 * 12,5 * 16,5 * 20,5 * 25,6 * 12,6 * 14,6 * 16,6 * 25,8 * 14,8 * 16,8 * 20,8 * 25,8 * 30,8 * 35,8 *40 and so on.
Steel structure connection with hexagon bolts performance grade 3.6,   4.6,   4.8,   5.6,   6.8,    8.8,   9.8,   10.9,   12.9 and other more than 10 grades, of which 8.8 and above bolts are made of low carbon alloy steel or medium carbon steel and heat treatment (quenching, tempering), known as high strength bolts, the rest known as ordinary bolts. The bolt performance grade label consists of two parts, which respectively represent the nominal tensile strength value and the flexure ratio of the bolt material.

specification table
Stainless steel hexagon bolt
Screw diametet ( d)	Coarse thread distance  ( P )	Head outside diameter (dk)		Head thickness  (k)		Hexagon opposite side   (s)		Hexagonal hole depth (  t  )
		max	min	max	min	max	min	min
:mm
M1.4	0.3	2.74	2.46	1.4	1.26	1.36	1.32	0.6
M1.6	0.35	3.14	2.86	1.6	1.46	1.56	1.52	0.7
M2	0.4	3.98	3.62	2	1.86	1.56	1.52	1
M2.5	0.45	4.68	4.32	2.5	2.36	2.06	2.02	1.1
M3	0.5	5.68	5.32	3	2.86	2.58	2.52	1.3
M4	0.7	7.22	6.78	4	3.82	3.08	3.02	2
M5	0.8	8.72	8.28	5	4.82	4.095	4.02	2.5
M6	1	10.22	9.78	6	5.7	5.14	5.02	3
M8	1.25	13.27	12.73	8	7.64	6.14	6.02	4
M10	1.5	16.27	15.73	10	9.64	8.175	8.025	5
M12	1.75	18.27	17.73	12	11.57	10.18	10.03	6
M14	2	21.33	20.67	14	12.57	12.21	12.03	7
M16	2	24.33	23.67	16	15.57	14.21	14.03	8
M18	2.5	27.33	26.67	18	17.57	14.21	14.03	9
M20	2.5	30.33	19.67	20	19.48	17.23	17.05	10
M22	2.5	33.39	32.61	22	21.48	17.23	17.05	11
M24	3	36.36	35.61	24	23.48	19.28	19.07	12
M27	3	40.39	39.61	27	26.48	19.28	19.07	13.5
M30	3.5	45.39	44.61	30	29.48	22.28	22.07	15.6