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DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration /Without Serration Zinc

China DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc, Find details about China Flange Bolts, Flange Head Hex Bolt from DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc

Model NO.
DIN6921
Application
Machinery, Chemical Industry, Environmental, Building
Finish
Blue-White Zinc Plated
Trademark
QBH
Transport Package
25kgs/Box, Bulk in Pallet
Specification
M4-M24
Origin
China
HS Code
73181500
Model NO.
DIN6921
Application
Machinery, Chemical Industry, Environmental, Building
Finish
Blue-White Zinc Plated
Trademark
QBH
Transport Package
25kgs/Box, Bulk in Pallet
Specification
M4-M24
Origin
China
HS Code
73181500
DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc
DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc


DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt
with Serration/without Serration Zinc
 
STYLEFlanged Hex Head Screws Flange Hex Head Bolt with Serration Zinc
STANDARDDIN6921
BrandQBH
Webqbfastener.en.made-in-china.com
SIZEM4-M24
CLASS(Carbon steel)Cl. 8, 10, 12 (≤M16)
Coating(Carbon steel)black, zinc, HDG, Heat treatment, Dacromet, GEOMET
MATERIALStainless steel(SS304/SS316)/Carbon steel/Brass
PACKINGbulk/ boxes in cartons, bulk in polybags/ buckets, etc.
PALLETsolid wood pallet, plywood pallet, ton box/bag, etc.

Product Description
These Class 8.8 steel screws are suitable for fastening most machinery and equipment. The flange
distributes pressure where the screw meets the surface, eliminating the need for a separate washer.
All screws meet DIN 6921 specifications for dimensions. 
 
 

DIN 6921 - Hexagon Flange Bolts Metric

Current norm: DIN EN 1665


DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc
DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc

DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc
DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc
DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc
DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc
DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration ZincDIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc

Legend:

d2 - the inner diameter of the ring
b - length of the thread (at least)
l - length of bolt
d - the nominal diameter of the thread
k - head height
s - size hex head turnkey

Makings:QBH

Steel: 4.6,8.8,10.9
Stainless: A2, A4
Plastic: -
Non Ferrous: -
Thread: 6g

Table according to DIN 6921:

TdreadM5M6M8M10M12(M14)M16M20
size d--M8 x 1M10 x 1,25M12 x 1,5(M14x1,5)M16 x 1,5M20 x 1,5
---(M10 x 1)(M10 x 1,25)---
P0,811,251,51,75222,5
CMin.11,11,21,51,82,12,43
daMin.5681012141620
Max.5,756,758,7510,81315,117,321,6
dcMax.11,814,217,921,82629,934,542,8
dwMin.9,812,215,819,623,827,631,939,9
eMin.8,7911,0514,3816,6420,0323,3626,7532,95
hMax.6,27,39,411,413,815,918,322,4
mMin.4,75,77,69,611,613,315,318,9
m´Min.2,23,14,55,56,77,8911,1
sNominal size
=max.		810131518212430
Min.7,789,7812,7314,7317,7320,6723,6729,16
rMax.0,30,360,480,60,720,880,961,2
Tab2
 
Thread dM5M6M8M10M12M14M16M 20
--M8 x 1M10 x 1,25M12 x 1,5M14 x 1,5M16 x 1,5M20 x 1,5
---(M10 x 1)(M12 x 1,25)---
lShank lengtds
nominal
dimension		min.max.ls min.lg maxls min.lg maxls min.lg maxls min.lg maxls min.lg maxls min.lg maxls min.lg maxls min.lg max
109,7110,29-2,4              
1211,6512,35-2,4-3            
1615,6516,35-2,4-3-4          
2019,5820,42-4-3-4-4,5        
2524,5825,425927-4-4,5-5,3      
3029,5830,421014712-8-4,5-5,3-6    
3534,535,5151912176,7513-9-5,3-6-6  
4039,540,52024172211,75186,514-10-6-6-7,5
4544,545,52529222716,752311,5196,2515-11-6-7,5
5049,550,53034273221,752816,52411,2520616-12-7,5
5554,455,6  323726,753321,52916,25251121717-9
6059,460,6  374231,753826,53421,253016261222-14
6564,465,5    36,754331,53926,2535213117276,519
7069,470,6    41,754836,54431,25402636223211,524
8079,480,6    51,755846,55441,25503646324221,534
9089,390,7      56,56451,25604656425231,544
10099,3100,7      66,57461,25705666526241,554
110109,3110,7        71,25806676627251,554
120119,3120,7        81,25907686728261,574
130129,2130,8          8090768665,578
140139,2140,8          90100869675,588
150149,2150,8            9610685,598
160159,2160,8            10611695,5108
180179,2180,8              115,5128
200199201              135,5148


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
4.64.85.65.86.88.89.810.912.9/12.9
D≤16mmad>16mmbd≤16mm
1Tensile strength
Rm,Mpa		nom.c40050060080090010001200
max.40042050052060080083090010401220
2Lower yield strength
ReL,Mpa		nom.c240--300--------------
max.240--300--------------
3Stress at 0,2 % nonproportional elongation
Rp0.2,Mpa		nom.c----------6406407209001080
max.----------6406607209401100
4Stress at 0,0048 d non-proportional elongation for
full-size fasteners
Rpf,Mpa		nom.c--320--400480----------
max.--340e--420e480e----------
5Stress under proof load
Spf,Mpa		nom.225310280380440580600650830970
Proof Sp,nom/ReL min Or
strength Sp,nom/Rp0.2min Or
rati Sp,nom/Rpf min
 		0.940.910.930.90.920.910.910.90.880.88
6Percentage elongation
after fracture for
machined test pieces,A,%		min.22--20----12121098
7Percentage reduction of area after
fracture for machined test pieces,Z,%		min.--52484844
8Elongation after fracture for full-size
fasteners,Af		min.--0.24--0.220.2----------
9Head soundnessNo fracture
10Vickers hardness, HV,
F≥98N		min.120130155160190250255290320385
max.220g250320335360380435
11Brinell hardness, HBW
,F=30D²		min.114124147152181238242276304366
max.209g238304318342361414
12Rockwell hardness,HRB ,
HRB		min.6771798289 
max.95g99.5 
Rockwell hardness,
HRC		min.--2223283239
max.--3234373944
13Surface hardness
HV 0.3		max.--hh,jh,j
14Height of non-decarburized thread zone,E,mmmin.--1/2H12/3H13/4H1
Depth of complete decarburization in the
thread,G,mm		max.--0.015
15Reduction of hardness after retempering,HVmax.--20
16Breaking torque,
MB,N·m		min.--in accordance with ISO 898-7
17Impact strength,
KVK,I,J		min.--27--27272727m
18Surface integrity in accordance withISO 6157-1nISO 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 %
CSiMnPSCrNiCuAl
0.060.060.330.0130.0030.0100.010.028

 

 

1035

CHEMICAL COMPOSI %
CSiMnPSCrNiCu
0.340.130.730.0120.0020.020.010.02

 

 

10B21

CHEMICAL COMPOSI %
CSiMnPSCrB
0.20.040.810.0170.0070.0170.0021

 

 

1045

CHEMICAL COMPOSI %
CSiMnPSCrNiCu
0.450.230.580.0140.0060.0570.0080.016

 

40CR

CHEMICAL COMPOSI %
CSiMnPSCrNiCu
0.40.210.540.0150.0080.950.020.02

 

35CRMO

CHEMICAL COMPOSI %
CSiMnPSCrNiCuMo
0.350.220.590.010.0030.930.010.010.21

 

 

42CRMO

CHEMICAL COMPOSI %
CSiMnPSCrNiCuMo
0.420.270.920.0130.0041.010.030.040.2

 

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

DIN6921 Carbon Steel Flanged Hex Head Screws Flange Hex Head Bolt with Serration/Without Serration Zinc

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

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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