Qbh Carbon Steel DIN557 Fastener Square Nuts

• Material: Carbon Steel
• Type: Square Head
• Connection: Common Bolt
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: DIN557
• Head Style: Square
• Standard: DIN
• Grade: 4.8
• Surface Finishing: Hot-Dipped Galvanized, Zinc Plated, Black
• Trade Mark: Qbh
• Purpose: Machinery, Environmental, Building, Industry
• Class Grade: 3.6, 4.6, 4.8, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9
• Available Material: Carbon Steel, Stainless Steel
• Size: M5-M20
• Transport Package: 25kgs/Box, Bulk in Pallet
• Specification: M5-M20
• Trademark: QBH
• Origin: China
• HS Code: 73181600
• Production Capacity: 100tons/Year
• Package Size: 26.00cm * 26.00cm * 14.00cm
• Package Gross Weight: 25.000kg

Product Description

 

Product Description

Metric DIN 557 regular pattern square nuts are four sided nuts. Their geometry provides a greater
surface area to apply higher torque when tightening and also a greater surface are in contact with
the part being fastened, thereby increasing the resistance to loosening.

Product Parameters

Square Nuts Our expertise enables us to manufacture, export and supply a broad range of Square Nuts.
Offered nuts are designed with high level of accuracy in tandem with the international standards.
Manufactured using superior quality raw material with the help of advanced technology;
 

Style	Square Nuts
Standard	DIN, ANSI, JIS, GB, BS, ISO, etc.
Supplier	QBH
Size	M5-M20
Class	4.8, 5.8, 6.8, 8.8, 10.9, 12.9
Coating	black, zinc, HDG, Heat treatment, plain, etc.
Material	Carbon steel
Packing	bulk/ boxes in cartons, bulk in poly bags/ buckets, etc.
Pallet	solid wood pallet, plywood pallet, ton box/bag, etc.
Shipment Port	Shanghai & Ningbo

DIN 557 - Square Nuts

Current norm: DIN 557
Equivalent norms: CSN 021624; PN 82151; UNI 5597;

Legend:

m - height of the nut
d - the nominal diameter of the thread
s - size square
mw - height

Makings:QBH

Steel: 6  8
Stainless: A2, A4
Plastic: -
Non Ferrous: -
Thread: 7H

 

Table according to DIN 557:

dimensions in mm

dimensions in mm

Thread size d		M5	M6	M8	M10		M12		M16
Item		Carbon Steel DIN557 Fastener Square Nuts
Supplier		QBH
P		0,8	1	1,25	1,5		1,75		2
dw	min.	6,7	8,7	11,5	14,5	15,5	16,5	17,2	22
e	max.	11,3	14,1	18,4	22,6	24	25,4	26,9	33,9
	min.	9,93	12,53	16,34	20,24	21,54	22,84	24,02	30,11
m	Nominal size max.	4	5	6,5	8		10		13
	min.	3,52	4,52	5,92	7,42		9,42		12,3
mw	min.	2,5	3,2	4,1	5,2		6,6		8,6
s	Nominal size max.	8	10	13	16	17	18	19	24
	min.	7,64	9,64	12,57	15,57	16,57	17,57	18,48	23,16
weight kg/1000pcs		1,31	2,77	5,5	10,7	13	16,3	19,1	38,2

 

 

Process flow

 

Cold forging

Annealing treatment(if need) ->  Wiredrawing -> Clod Forging -> Tapping -> Make Heat Treatment(if need) -> Finish -> Packing

 

 

Product Grade

 

Class 6 and 8

 

 

Materials and Chemical Compstition

 

1008

QBH Carbon Steel DIN557 Fastener Square Nuts 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

QBH Carbon Steel DIN557 Fastener Square Nuts 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

 

 

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

Mechanical Propert

TESTING STANDARD:DIN267- 4 OR ISO898-2

SIZE

CLASS

04

05

PROOF LOAD N/mm2

HV

NUT

PROOF LOAD N/mm2

HV

NUT

>

≤

min

max

HEAT TREATMENT

TYPE

min

max

HEAT TREATMENT

TYPE

Item

Carbon Steel DIN557 Fastener Square Nuts

Supplier

QBH

/

M4

380

188

302

NO

THIN NUT

500

272

353

YES

THIN NUT

M4

M7

M7

M10

M10

M16

M16

M39

SIZE

CLASS

4

5

PROOF LOAD N/mm2

HV

NUT

PROOF LOAD N/mm2

HV

NUT

>

≤

min

max

HEAT TREATMENT

TYPE

min

max

HEAT TREATMENT

TYPE

/

M4

/

/

/

/

/

520

130

302

NO

1

M4

M7

580

M7

M10

590

M10

M16

610

M16

M39

510

117

302

NO

1

630

146

SIZE

CLASS

6

8

PROOF LOAD N/mm2

HV

NUT

PROOF LOAD N/mm2

HV

NUT

>

≤

min

max

HEAT TREATMENT

TYPE

min

max

HEAT TREATMENT

TYPE

/

M4

600

150

302

NO

1

800

180

302

NO

1

M4

M7

670

855

200

M7

M10

680

870

M10

M16

700

880

M16

M39

720

170

920

233

353

YES

SIZE

CLASS

8

9

PROOF LOAD N/mm2

HV

NUT

PROOF LOAD N/mm2

HV

NUT

>

≤

min

max

HEAT TREATMENT

TYPE

min

max

HEAT TREATMENT

TYPE

/

M4

/

/

/

/

/

900

170

302

NO

2

M4

M7

915

188

M7

M10

940

M10

M16

950

M16

M39

890

180

302

NO

2

920

SIZE

CLASS

10

12

PROOF LOAD N/mm2

HV

NUT

PROOF LOAD N/mm2

HV

NUT

>

≤

min

max

HEAT TREATMENT

TYPE

min

max

HEAT TREATMENT

TYPE

/

M4

1040

272

353

YES

1

1140

295

353

YES

1

M4

M7

1040

1140

M7

M10

1040

1140

M10

M16

1050

1140

M16

M39

1060

/

/

/

/

/

SIZE

CLASS

12

PROOF LOAD N/mm2

HV

NUT

>

≤

min

max

HEAT TREATMENT

TYPE

/

M4

1150

272

353

YES

2

M4

M7

1150

M7

M10

1160

M10

M16

1190

M16

M39

1200

 

Detailed Photos

Certifications & Packaging

FAQ

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 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!