China OEM manufacturer Hex Bolt Screw - DIN912 T2 Copper Hex Socket Cup Head Screw – Hongji manufacturers and suppliers

OEM manufacturer Hex Bolt Screw - DIN912 T2 Copper Hex Socket Cup Head Screw – Hongji

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DIN 912 Copper screw
DIN912 Hex Socket Cup Head Screw Grade 12.9 Black Oxide5

d		M1.4	M1.6	M2	M2.5	M3	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20
d
P	Coarse thread	0.3	0.35	0.4	0.45	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5
	Fine thread	/	/	/	/	/	/	/	/	1	1.25	1.5	1.5	1.5	2	2
	Very Fine thread	/	/	/	/	/	/	/	/	/	1	1.25	/	/	1.5	1.5
b	Reference value	14	15	16	17	18	20	22	24	28	32	36	40	44	48	52
d_k	Max （Smooth）	2.6	3	3.8	4.5	5.5	7	8.5	10	13	16	18	21	24	27	30
	Max （Knurl*）	2.74	3.14	3.98	4.68	5.68	7.22	8.72	10.22	13.27	16.27	18.27	21.33	24.33	27.33	30.33
	Min	2.46	2.86	3.62	4.32	5.32	6.78	8.28	9.78	12.73	15.73	17.73	20.67	23.67	26.67	29.67
d_s	Max	1.4	1.6	2	2.5	3	4	5	6	8	10	12	14	16	18	20
d_s	Min	1.26	1.46	1.86	2.36	2.86	3.82	4.82	5.82	7.78	9.78	11.73	13.73	15.73	17.73	19.67
k	Max	1.4	1.6	2	2.5	3	4	5	6	8	10	12	14	16	18	20
k	Min	1.26	1.46	1.86	2.36	2.86	3.82	4.82	5.7	7.64	9.64	11.57	13.57	15.57	17.57	19.48
s	Nominal	1.3	1.5	1.5	2	2.5	3	4	5	6	8	10	12	14	14	17
	Min	1.32	1.52	1.52	2.02	2.52	3.02	4.02	5.02	6.02	8.025	10.025	12.032	14.032	14.032	17.05
	Max	1.36	1.56	1.56	2.06	2.58	3.08	4.095	5.14	6.14	8.175	10.175	12.212	14.212	14.212	17.23
t	Min	0.6	0.7	1	1.1	1.3	2	2.5	3	4	5	6	7	8	9	10
Thread length=b		-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

d		(M22)	M24	(M27)	M30	(M33)	M36	M42	M48	M56	M64	M72	M80	M90	M100
d
P	Coarse thread	2.5	3	3	3.5	3.5	4	4.5	5	5.5	6	6	6	6	6
	Fine thread	2	2	2	2	2	3	3	3	4	4	4	4	4	4
	Very Fine thread	1.5	/	/	/	/	/	/	/	/	/	/	/	/	/
b	Reference value	56	60	66	72	78	84	96	108	124	140	156	172	192	212
d_k	Max （Smooth）	33	36	40	45	50	54	63	72	84	96	108	120	135	150
	Max （Knurl*）	33.39	36.39	40.39	45.39	50.39	54.46	63.46	72.46	84.54	96.54	108.54	120.54	135.63	150.63
	Min	32.61	35.61	39.61	44.61	49.61	53.54	62.54	71.54	83.46	95.46	107.46	119.46	134.37	149.37
d_s	Max	22	24	27	30	33	36	42	48	56	64	72	80	90	100
d_s	Min	21.67	23.67	26.67	29.67	32.61	35.61	41.61	47.61	55.54	63.54	71.54	79.54	89.46	99.46
k	Max	22	24	27	30	33	36	42	48	56	64	72	80	90	100
k	Min	21.48	23.48	26.48	29.48	32.38	35.38	41.38	47.38	56.26	63.26	71.26	79.26	89.13	99.13
s	Nominal	17	19	19	22	24	27	32	36	41	46	55	65	75	85
	Min	17.05	19.065	19.065	22.065	24.065	27.065	32.08	36.08	41.08	46.08	55.1	65.1	75.1	85.12
	Max	17.23	19.275	19.275	22.275	24.275	27.275	32.33	36.33	41.33	46.33	55.4	65.4	75.4	85.47
t	Min	11	12	13.5	15.5	18	19	24	28	34	38	43	48	54	60
Thread length=b		-	-	-	-	-	-	-	-	-	-	-	-	-	-

Detail drawing

Copper Brass Bronze Material Screw

What is the difference between Copper, Brass, Bronze?

Copper, Brass and Bronze, otherwise known as the “Red Metals”, may look the same initially. But they indeed have many difference in element, performance and so on.

Copper

Copper is used in a wide range of products due to its excellent electrical and thermal conductivity, good strength, good formability and resistance to corrosion. Pipe and pipe fittings are commonly manufactured from these metals due to their corrosion resistance. They can be readily soldered and brazed, and many can be welded by various gas, arc and resistance methods. They can be polished and buffed to almost any desired texture and luster.

There are grades of unalloyed Copper, and they can vary in the amount of impurities that are contained. Oxygen-free copper grades are used specifically in functions where high conductivity and ductility are needed.

One of the most important properties of copper is its ability to fight bacteria. After extensive antimicrobial testing by the Environmental Protection Agency, it was found that 355 copper alloys, including many brasses, were found to kill more than 99.9% of bacteria within two hours of contact. Normal tarnishing was found not to impair antimicrobial effectiveness.

Copper Applications

Copper was one of the earliest metals discovered. The Greeks and Romans made it into tools or adornments, and there are even historical details showing the application of copper to sterilize wounds and purify drinking water. Today it is most commonly found in electrical materials such as wiring because of its ability to effectively conduct electricity.

Brass

Brass is mainly an alloy that consists of copper with zinc added. Brasses can have varying amounts of zinc or other elements added. These varying mixtures produce a wide range of properties and variation in color. Increased amounts of zinc provide the material with improved strength and ductility. Brass can range in color from red to yellow depending on the amount of zinc added to the alloy.

If the zinc content of the brass ranges from 32% to 39%, it will have increased hot-working abilities but the cold-working will be limited.

If the brass contains over 39% zinc (example – Muntz Metal), it will have a higher strength and lower ductility (at room temperature).

Brass Applications

Brass is commonly used for decorative purposes primarily because of its resemblance to gold. It is also a commonly used to make musical instruments due to its high workability and durability.

Bronze

Bronze is an alloy that consists primarily of copper with the addition of other ingredients. In most cases the ingredient added is typically tin, but arsenic, phosphorus, aluminum, manganese, and silicon can also be used to produce different properties in the material. All of these ingredients produce an alloy much harder than copper alone.

Bronze is characterized by its dull-gold color. You can also tell the difference between bronze and brass because bronze will have faint rings on its surface.

Bronze Applications

Bronze is used in the construction of sculptures, musical instruments and medals, and in industrial applications such as bushings and bearings, where its low metal on metal friction is an advantage. Bronze also has nautical applications because of its resistance to corrosion.