DIN7991 CSK Socket Machine Screw
Name:DIN7991 CSK socket machine screw
Surface: zinc plated
Material: Carbon Steel
SIZE: M4-M24
Unite:Piece
Grade:4.8,8.8,10.9
Certification: ISO9001
MOQ:1000PCS
Samples: Free
Packing:Bulk , small boxes in cartons with pallet
Lead time: 30-40days
Place of Origin: Zhejiang China
Production Information
Haiyan Gete Hardware is a professional producer and supplier of machine screws.with a focus on offering reasonably priced, custom-made goods of the highest caliber.DIN7991 CKS Socket Machine screw is one of the most popular screws of our products.It is a type of fastener with a hexagonal recess in the head, allowing it to be tightened or loosened using a hex key or Allen wrench. The countersunk head is designed to sit flush with the surface it is installed into, providing a smooth and even appearance. These screws are commonly used in applications where a flush finish is desired, such as in machinery, automotive parts, and electronics.
There are two types of materials for hexagon socket head screws. These two are commonly used materials, including stainless steel and carbon steel. We generally refer to carbon steel as iron. Carbon steel is divided according to the grade of hardness, including low carbon steel. There are three types of medium carbon steel and high carbon steel. Therefore, the strength grades of hexagon socket round head screws include grade 4.8, grade 8.8, grade 10.9, and grade 12.9.
DIN7991 Hexagon socket countersunk screw torque standard
In the field of industrial manufacturing, screws, as an important component of connecting parts, play a vital role in product design and use. As a commonly used mechanical connection element, the torque standard of DIN7991 hexagon socket countersunk screws has long been the focus of attention of engineers and technicians.
The torque standard of screws is an important factor in ensuring the quality and safety of threaded connections. The correct torque can ensure that the threaded connection meets the expected tightening force. Too high or too low torque may cause the threaded connection to fail, thus causing safety hazards and equipment failure.
According to the DIN7991 standard, the torque standard of hexagon socket countersunk head screws should comply with relevant standards and specifications. During use, an appropriate torque wrench should be selected and the correct torque should be performed according to the screw diameter and material. control. It is also necessary to pay attention to the use of lubricants between threads and the condition of threaded connection surfaces.
Characteristics of the Countersunk hexagon socket screws DIN7991
The screws from our factory typically composed of premium materials, countersunk hexagon socket screws have exceptional corrosion resistance and can continue to function steadily under a range of challenging conditions. Despite prolonged exposure to air, the screws exhibit good oxidation resistance and are difficult to rust or oxidize.
And our countersunk hexagon socket screws are strong and resilient to high shear and tensile stresses. under order to satisfy the demands of special occasions, it can also continue to operate steadily under hot conditions. So if you are interested in , pls call us today for more information about it.
What Is The Difference Between Internal Hexagonal Screws And External Hexagonal Screws?
Internal hexagonal screws are also called hex socket screws; there is a difference between the external hexagonal screws. Strictly speaking, they are two different types of fasteners used for various applications. The main difference between the two is their design and the way they are used.
The top of the screw head of internal hexagonal screws, sometimes referred to as Allen head screws, has a recessed hexagonal form. In order to turn and tighten the screw, an Allen wrench is placed into the recessed section of this hexagonal form. Since the screw head of an internal hexagonal screw lays flat against the surface it is screwed into, these screws are frequently employed in applications where a flush finish is required.
Conversely, the outside of the screw head of external hexagonal screws is hexagonal in shape. Because the hexagonal shape gives the wrench a secure hold, a wrench is necessary to tighten or loosen these screws. Because the wrench can apply more force than can be done by hand, external hexagonal screws are frequently employed in applications where a high amount of torque is needed.
The choice between the two will depend on the specific application and the level of force or grip required.
|
Thread |
M4 |
M5 |
M6 |
M8 |
M10 |
M12 |
M16 |
(M18) |
M20 |
M24 |
|
|
d |
|||||||||||
|
P |
Pitch |
0.7 |
0.8 |
1 |
1.25 |
1.5 |
1.75 |
2 |
2.5 |
2.5 |
3 |
|
α |
tol.(+2) |
90° |
90° |
90° |
90° |
90° |
90° |
90° |
90° |
90° |
60° |
|
b |
L≤125 |
14 |
16 |
18 |
22 |
26 |
30 |
38 |
42 |
46 |
54 |
|
125＜L ≤ 200 |
/ |
/ |
24 |
28 |
32 |
36 |
44 |
48 |
52 |
60 |
|
|
L＞200 |
/ |
/ |
/ |
/ |
45 |
49 |
57 |
61 |
65 |
73 |
|
|
dk |
Max=Diam |
8 |
10 |
12 |
16 |
20 |
24 |
30 |
33 |
36 |
39 |
|
Min |
7.64 |
9.64 |
11.57 |
15.57 |
19.48 |
23.48 |
29.48 |
32.38 |
35.38 |
38.38 |
|
|
ds |
Max=Diam |
4 |
5 |
6 |
8 |
10 |
12 |
16 |
18 |
20 |
24 |
|
Min |
3.82 |
4.82 |
5.82 |
7.78 |
9.78 |
11.73 |
15.73 |
17.73 |
19.67 |
23.67 |
|
|
e |
Min |
2.87 |
3.44 |
4.58 |
5.72 |
6.86 |
9.15 |
11.43 |
13.72 |
13.72 |
16 |
|
k |
MAX |
2.3 |
2.8 |
3.3 |
4.4 |
5.5 |
6.5 |
7.5 |
8 |
8.5 |
14 |
|
s |
Diam |
2.5 |
3 |
4 |
5 |
6 |
8 |
10 |
12 |
12 |
14 |
|
Min |
2.52 |
3.02 |
4.02 |
5.02 |
6.02 |
8.025 |
10.025 |
12.032 |
12.032 |
14.032 |
|
|
MAX |
2.6 |
3.1 |
4.12 |
5.14 |
6.14 |
8.175 |
10.175 |
12.212 |
12.212 |
14.212 |
|
|
t |
Max=Diam |
1.8 |
2.3 |
2.5 |
3.5 |
4.4 |
4.6 |
5.3 |
5.5 |
5.9 |
10.3 |
|
Min |
1.55 |
2.05 |
2.25 |
3.2 |
4.1 |
4.3 |
5 |
5.2 |
5.6 |
9.87 |
|
About us
Haiyan Gete Hardware Co.,Ltd
Haiyan Gete Hardware Co., Ltd. is a top-rated manufacturer and supplier of fastener products. Our product line range includes standard fasteners (such as bolts, nuts, screws, studs, and anchors) and non-standard parts, which we customize according to the drawings from the customers. If you're in need of top-quality fasteners, contact us today to learn more about our products and services.
Main Products
Package
SMALL PACKAGE
BULK PACKAGE
Workshop
SCREENING MACHINE
FAQ
Q: Is It Possible package according to my Customized requirement?
A: Yes,the packaging quantity and box print can be customized according your requirement.
Q: What's your Hot sale products?
A:Drywall screws,Chipboard screws,Wood Screws,Self Tapping Screws,Self Drilling Screws,Roofing Screw,Truss Head screwsws and other Special screws.
Q: Are you trading company or manufacturer?
A: We are manufacturer. Our production manager has over 15 years production experience on Screws.
Q: How long is your delivery time?
A: Generally it is10-15 days if the goods are in stock. or it is 4-5 weeks if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra?
A: Yes, we could offer the sample for free charge but consumer should pay the freight first.
Q: Why choose us?
A: 1) Reply you in 24 working hours.
2) Experienced staffs would like to answer all your questions in time.
3) Customized design is available.
4) As an honest exported seller, We are a professional manufacturer,quality quotation, good service, skilled technicians to ensure our products to be finished in high quality and stable.
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