OEM Manufacturer Hexagonal Bolt Head - Hot dip galvanized 8.8 grade DIN933 hexagon bolt with heat treatment diameter range M4-M52 – Tiancong

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OEM Manufacturer Hexagonal Bolt Head - Hot dip galvanized 8.8 grade DIN933 hexagon bolt with heat treatment diameter range M4-M52 – Tiancong Detail:

Surface treatment

Related Knowlege :
The material comes from a china state-owned big steel manufacturer, which can issue an authoritative material inspection report for 35 #, 45 #, 345B, 40Cr, 35CrmoA, and other special materials.

This guarantee the required hardness and screw torque and other mechanical characters.

Product Parameter

Screw Thread d			M4	M5	M6	(M7)	M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24	(M27)	M30	(M33)	M36	(M39)	M42	(M45)	M48	(M52)
P	Pitch		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	4	4	4.5	4.5	5	5
a	max		2.1	2.4	3	3	3.75	4.5	5.25	6	6	7.5	7.5	7.5	9	9	10.5	10.5	12	12	13.5	13.5	15	15
c	min		0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.3	0.3	0.3	0.3	0.3
c	max		0.4	0.5	0.5	0.5	0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	1	1	1	1	1
da	max		4.7	5.7	6.8	7.8	9.2	11.2	13.7	15.7	17.7	20.2	22.4	24.4	26.4	30.4	33.4	36.4	39.4	42.4	45.6	48.6	52.6	56.6
dw	Grade A	min	5.9	6.9	8.9	9.6	11.6	15.6	17.4	20.5	22.5	25.3	28.2	30	33.6	-	-	-	-	-	-	-	-	-
dw	Grade B	min	5.7	6.7	8.7	9.4	11.4	15.4	17.2	20.1	22	24.8	27.7	29.5	33.2	38	42.7	46.5	51.1	55.9	59.9	64.7	69.4	74.2
e	Grade A	min	7.66	8.79	11.05	12.12	14.38	18.9	21.1	24.49	26.75	30.14	33.53	35.72	39.98	-	-	-	-	-	-	-	-	-
e	Grade B	min	7.5	8.63	10.89	11.94	14.2	18.72	20.88	23.91	26.17	29.56	32.95	35.03	39.55	45.2	50.85	55.37	60.79	66.44	71.3	76.95	82.6	88.25
k	Nominal Size		2.8	3.5	4	4.8	5.3	6.4	7.5	8.8	10	11.5	12.5	14	15	17	18.7	21	22.5	25	26	28	30	33
	Grade A	min	2.68	3.35	3.85	4.65	5.15	6.22	7.32	8.62	9.82	11.28	12.28	13.78	14.78	-	-	-	-	-	-	-	-	-
	Grade A	max	2.92	3.65	4.15	4.95	5.45	6.56	7.68	8.98	10.18	11.72	12.72	14.22	15.22	-	-	-	-	-	-	-	-	-
	Grade B	min	2.6	3.26	3.76	4.56	5.06	6.11	7.21	8.51	9.71	11.15	12.15	13.65	14.65	16.65	18.28	20.58	22.08	24.58	25.58	27.58	29.58	32.5
	Grade B	max	3	3.74	4.24	5.04	5.54	6.69	7.79	9.09	10.29	11.85	12.85	14.35	15.35	17.35	19.12	21.42	22.92	25.42	26.42	28.42	30.42	33.5
k1	min		1.9	2.28	2.63	3.19	3.54	4.28	5.05	5.96	6.8	7.8	8.5	9.6	10.3	11.7	12.8	14.4	15.5	17.2	17.9	19.3	20.9	22.8
r	min		0.2	0.2	0.25	0.25	0.4	0.4	0.6	0.6	0.6	0.6	0.8	0.8	0.8	1	1	1	1	1	1.2	1.2	1.6	1.6
s	max=nominal size		7	8	10	11	13	17	19	22	24	27	30	32	36	41	46	50	55	60	65	70	75	80
	Grade A	min	6.78	7.78	9.78	10.73	12.73	16.73	18.67	21.67	23.67	26.67	29.67	31.61	35.38	-	-	-	-	-	-	-	-	-
	Grade B	min	6.64	7.64	9.64	10.57	12.57	16.57	18.48	21.16	23.16	26.15	29.16	31	35	40	45	49	53.8	58.8	63.1	68.1	73.1	78.1

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Sticking for the basic principle of "Super Top quality, Satisfactory service" ,We've been striving to be an excellent business enterprise partner of you for OEM Manufacturer Hexagonal Bolt Head - Hot dip galvanized 8.8 grade DIN933 hexagon bolt with heat treatment diameter range M4-M52 – Tiancong, The product will supply to all over the world, such as: Myanmar, Czech republic, Slovakia, The best and original quality for spare parts is a most important factor for transportation. We may stick on supplying original and good quality parts even a little profit earned. God will bless us to do kindness business forever.

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