Carbon Steel Hex Hexagon Round Bugle Slotted Head Coarse Thread Drywall Furniture Wood Self Tapping Drilling Roofing Ring Anchor Chipboard Screws

Product Description

DIN571 Carbon Steel Wzp Hexagonal & Bugle Head Wood Self Tapping
Screw Coil Ring Nail
Legend: b - length of the thread (at least)l - length of boltk - head heighte - the diameter of the circumscribed circle (not less than)s - size hex head turnkey
Drywall Screw ( Please Click the Following Picture)
Self Drilling Screw ( Please Click the Following Picture)
Roofing Hanger Bolt Screw ( Please Click the Following Picture)
Makings:QBH
Steel: steelStainless: A2, A4Plastic: -Non Ferrous: -Thread: as DIN 7998
Table according to DIN 571:

Thread			4	5	6	-7	8	10	12	16	20
ds		nominal size max.	4	5	6	7	8	10	12	16	20
		min.	3,52	4,52	5,52	6,42	7,42	9,42	11,3	15,3	19,3
da		max.	5	6	7,2	8,2	10,2	12,2	15,2	19,2	24,4
k		nominal size	2,8	3,5	4	5	5,5	7	8	10	13
		max.	3,1	3,88	4,38	5,38	5,88	7,45	8,45	10,45	13,9
		min.	2,5	3,13	3,63	4,63	5,13	6,55	7,55	9,55	12,1
s		nominal size	7	8	10	12	13	17	19	24	30
		max.	7	8	10	12	13	17	19	24	30
		min.	6,64	7,64	9,64	11,57	12,57	16,57	18,48	23,16	29,16
e		min.	7,5	8,63	10,89	13,07	14,2	18,72	20,88	26,17	32,95
l			weight kg/1000pcs
nominal size	min.	max.
16	15,1	16,9	1,71	292
20	18,95	21,05	2,01	3,42	5,02
25	23,95	26,05	2,41	4,02	5,82		11,5
30	28,95	31,05	2,81	4,62	6,62		12,9	23,6
35	33,75	36,25	3,11	5,12	7,42		14,2	25,8	36,2
40	38,75	41,25	3,51	5,82	8,22		15,6	28	39,2
45	43,75	46,25			8,94		16,9	30	42,1
50	48,75	51,25			9,64		18,2	32,1	45,4	84,1
55	53,5	56,5			10,5		19,6	34,3	48,6	89,7
60	58,5	61,5			11,2		20,9	36,5	51,8	94,9	165
65	63,5	66,5					22,2	38,5	54,7	99,5	174
70	68,5	71,5					23,6	40,7	57,8	107	182
75	73,5	76,5					25	42,9	61	112	192
80	78,5	81,5					26,5	45,2	64,5	118	201
90	88,25	91,75					29,4	49,9	71	130	220
100	98,25	101,75					32	54	77,1	141	238
110	108,25	111,75							83,4	152	253
120	118,25	121,75							89,5	163	275
130	128	132								175	293
140	138	142								187	317
150	148	152								198	328
160	158	162								209	348
170	168	172									366
180	178	182									385
190	187,7	192,3									404
200	197,7	202,3									421

Process flow
Cold forging
Annealing treatment(if need) -> wiredrawing -> clod forging -> thread rolling -> make heat treatment(if need) -> Finish Packing

Hot forging
Cutting material -> hot forging -> turning -> shrink diameter(half thread) -> thread rolling -> make heat treatment(if need) -> Finish -> Packing

Product Grade
Class4.8 Class5.8 Class6.8 Class8.8 Class10.9 Class12.9

NO.	Mechanical or physical property		Property class
			4.6	4.8	5.6	5.8	6.8	8.8		9.8	10.9	12.9/12.9
								D≤16mma	d>16mmb	d≤16mm
1	Tensile strength Rm,Mpa	nom.c	400		500		600	800		900	1000	1200
		max.	400	420	500	520	600	800	830	900	1040	1220
2	Lower yield strength ReL,Mpa	nom.c	240	--	300	--	--	--	--	--	--	--
		max.	240	--	300	--	--	--	--	--	--	--
3	Stress at 0,2 % nonproportional elongation Rp0.2,Mpa	nom.c	--	--	--	--	--	640	640	720	900	1080
		max.	--	--	--	--	--	640	660	720	940	1100
4	Stress at 0,0048 d non-proportional elongation for full-size fasteners Rpf,Mpa	nom.c	--	320	--	400	480	--	--	--	--	--
		max.	--	340e	--	420e	480e	--	--	--	--	--
5	Stress under proof load Spf,Mpa	nom.	225	310	280	380	440	580	600	650	830	970
	Proof Sp,nom/ReL min Or strength Sp,nom/Rp0.2min Or rati Sp,nom/Rpf min		0.94	0.91	0.93	0.9	0.92	0.91	0.91	0.9	0.88	0.88
6	Percentage elongation after fracture for machined test pieces,A,%	min.	22	--	20	--	--	12	12	10	9	8
7	Percentage reduction of area after fracture for machined test pieces,Z,%	min.	--					52		48	48	44
8	Elongation after fracture for full-size fasteners,Af	min.	--	0.24	--	0.22	0.2	--	--	--	--	--
9	Head soundness		No fracture
10	Vickers hardness, HV, F≥98N	min.	120	130	155	160	190	250	255	290	320	385
		max.	220g				250	320	335	360	380	435
11	Brinell hardness, HBW ,F=30D²	min.	114	124	147	152	181	238	242	276	304	366
		max.	209g				238	304	318	342	361	414
12	Rockwell hardness,HRB , HRB	min.	67	71	79	82	89
		max.	95g				99.5
	Rockwell hardness, HRC	min.	--					22	23	28	32	39
		max.	--					32	34	37	39	44
13	Surface hardness HV 0.3	max.	--					h			h,j	h,j
14	Height of non-decarburized thread zone,E,mm	min.	--					1/2H1			2/3H1	3/4H1
	Depth of complete decarburization in the thread,G,mm	max.	--					0.015
15	Reduction of hardness after retempering,HV	max.	--					20
16	Breaking torque, MB,N·m	min.	--					in accordance with ISO 898-7
17	Impact strength, KVK,I,J	min.	--		27	--		27	27	27	27	m
18	Surface integrity in accordance with		ISO 6157-1n									ISO 6157-3
a Values do not apply for structural bolting. b For structural bolting d W M12. c Nominal values are specified only for the purpose of the designation system for property classes.See Clause 5. d In cases where the lower yield strength ReL cannot be determined, it is permissible to measure the stress at 0,2 % non-proportional elongation Rp0,2. e For the property classes 4.8, 5.8 and 6.8 the values for Rpf min are under investigation. The present values are given for calculation of the proof stress ratio only. They are not test values. f Proof loads are specified in Tables 5 and 7. g Hardness determined at the end of a fastener shall be 250 HV, 238 HB or 99,5 HRB maximum. h Surface hardness shall not be more than 30 Vickers points above the measured core hardness of the fastener when determination of both surface hardness and core hardness are carried out with HV 0,3. i Any increase in hardness at the surface which indicates that the surface hardness exceeds 390 HV is not acceptable. j Any increase in hardness at the surface which indicates that the surface hardness exceeds 435 HV is not acceptable. k Values are determined at a test temperature of −20 °C, see 9.14. l Applies to d W 16 mm. m Value for KV is under investigation. n Instead of ISO 6157-1, ISO 6157-3 may apply by agreement between the manufacturer and the purchaser.

Materials and Chemical compstition
1008

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Al
0.06	0.06	0.33	0.013	0.003	0.01	0	0.01	0.028

1035

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.34	0.13	0.73	0.012	0.002	0.02	0.01	0.02

10B21

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	B
0.2	0.04	0.81	0.017	0.007	0.017	0.0021

1045

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.45	0.23	0.58	0.014	0.006	0.057	0.008	0.016

40CR

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.4	0.21	0.54	0.015	0.008	0.95	0.02	0.02

35CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.35	0.22	0.59	0.01	0.003	0.93	0.01	0.01	0.21

42CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.42	0.27	0.92	0.013	0.004	1.01	0.03	0.04	0.2

Finish

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON


PACKING
QBH BULK
20-25KG/CTN,36CTNS/PALLET
20-30KG/BAGS,36BAGS/PALLET
ONE TON/BOXES
50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING
Packing in small boxes according to customer's requirements
Packing in plastic bag according to customer's requirements

QBH PALLET TYPE
SOLID WOOD FUMIGATION PALLET
EURO Pallet
THREE SPLINT PALLET
WOODEN BOX
Free Samples for standard fastener from Jiaxing City Qunbang Hardware
We Promise:
1.High quality
2. Competitive price
3. The shortest delivery
4. The fastest response
5. The best service
Our Services
Professional Manufacturer: All of our Fastener are designed and manufactured according to buyers' specification and performance.
Quality is guaranteed: Durability testing and critical technical design to enhance fasteners lifetime.
Cost effective: Competitive prices with professional factory supply
Perfect fastening solution with 15 years experiences to solve your problem: Wide range of parts selection.
Customized Ideal Fasteners: customized services according to the samples and drawings offered Free Samples for Standard Fastener from Jiaxing City Qunbang Hardware We Promise:
1.High quality2. Competitive price3. The shortest delivery4. The fastest response5. The best service
FAQ
1.What's your experience like?
Our general manager has been engaged in the export of fasteners since 2005.
Our team can provide you with professional fasteners selling and smooth export services.
2.How about your price?
High quality products with reasonable price. Please give me a inquire, We will quoted you a price for you refer at once.
3. How do you control your quality?
We require the quality control department to inspect every production link of each shipment. And we can provide you MTC and mill certificate when the goods is finished.
4.How about your delivery time?
General speaking, if the goods is in stock, we can delivery them with 2-5days, If the quantity is 1-2container, we can give you with 18-25days,if the quantity is more than 2 container and you are very urgent, we can let factory priority produce your goods.
5.What is your packing?
Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallets is about 900-960kg, We also can make customer's logo on the cartons. Or we customized cartons according to customers' requirement.
6.What is your payment term?
We can accept T/T,LC for general order ,Paypal and Western union for small order or samples order. Awaiting for your kind inquiry! Thanks & best regards!For more information: http://qbfastener.en.made-in-china.com

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