20pieces M4*35 Tooth Length 12mm 304 Stainless Steel Stud Rod Stick Double Head Screw Bolt GB Metric Standard | Обустройство дома

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Brand	BRT / Bai Ruite	Material	304 stainless steel
name	Double - headed screw	Surface treatment	Untreated
standard	Metric	package instruction	Plastic bags / cartons
size	For example: M6 * 500 (thread diameter 6mm screw length 500mm)
Screw 304 stainless steel bolt series201 stainless steel bolt series12.9 bolt series4.8 carbon steel bolt series

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Note: The following values for the single-batch manual measurement, there is a certain error to prevail in kind. Be careful to shoot or contact customer service!								Unit: mm
Screw length L	Tooth length b
	M3	M4	M5	M6	M8	M10	M12	M16
20	-	7	7	-	-	-	-	-
25	-	10	9	-	-	-	-	-
30	-	12	12	-	12	-	-	-
35	-	12	14	-	15	-	-	Whole tooth
40	-	14	14	18	18	18	18	Whole tooth
45	-	-	-	-	18	-	-	Whole tooth
50	14	15	16	20	twenty two	twenty two	twenty two	Whole tooth
55	14	-	-	-	twenty two	-	-	Whole tooth
60	17	18	20	25	25	25	25	Whole tooth
70	17	18	20	25	25	30	30	Whole tooth
80	18	18	25	25	25	30	30	Whole tooth
90	18	18	25	30	25	30	30	Whole tooth
100	18	18	25	30	30	30	30	40
110	18	18	25	30	35	35	35	40
120	19	18	28	30	35	35	35	40
130	20	20	28	30	35	35	35	45
140	28	20	28	35	35	40	40	45
150	19	20	28	35	35	40	40	45
160	29	16	18	18	28	28	38	45
170	30	16	18	18	28	28	38	50
180	29	16	18	18	28	28	38	50
190	33	16	18	18	28	28	38	50
200	34	16	18	18	28	28	38	50
250	-	-	-	43	44	44	39	-

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Chemical composition,%, max
Group	C	Si	Mn	Gt;	Lt; / RTI & gt;	Cr	Mo	Ni	Cu	characteristic
304-A2	0.1	1	2	0.05	0.03	15-20		8-19	4	Work hardening rate is moderate, suitable for general cold processing and stretching, cold processing performance is better, generally used for hexagonal screws, nuts and gasket products
316-A4	0.08	1	2	0.045	0.03	16-18.5	2-3	10-15	1	Plus molybdenum, corrosion resistance than 304 strong, especially for seawater and chemical media, more corrosion resistance and pitting resistance.
Note: 1) If the nickel content is less than 8%, the minimum content of manganese must be 5% 2) When the nickel content is more than 8%, the minimum content of copper is not limited 3) If the chromium content is less than 17%, then the minimum nickel content of 12% 4) For the maximum 0.03% carbon content of austenitic stainless steel, nitrogen content of up to 0.22 5) For larger diameter products, in order to achieve the specified mechanical properties in the manufacturer\'s instructions, may have a higher carbon content, but martensitic steel should not exceed 0.12%

Mechanical behavior
category	Group	Performance level	Screw diameter	Tensile strength mpa / mm2	The specified non-proportional elongation shall be mpa / mm2	Elongation after breaking mpa / mm2
Austenite	A2, A4	50	Lt;	500	210	0.6d
		70	Lt;	700	450	0.4d
		80	Lt;	800	600	0.3d

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