Chamfered Hexagon Socket Screws
No.:DIN 7991
Grade:8.8, 10.9,12.9
Size:M2-M20 Thread diameter*screw length
Product Description
Chamfer socket head screws are a widely used fastener in a variety of applications. They are known for their durability, strength and ease of use. These screws have a hexagonal head with a socket in the center, and they also have chamfered edges, making them easy to insert into the target material.
Product Details
Specification:Chamfered inner hexagon screws
No.:DIN 7991
Grade:8.8, 10.9,12.9
Size:M2-M20 Thread diameter*screw length
Material:Stainless steel
Head style:Counter sunk bolt
Trademark:OEM
Standard:DIN/GB/ISO/JIS/BA/ANSI
Introduction
What are countersunk head screws?
Countersunk head screws are also called flat machine screws. The head is a 90-degree cone, similar to common wood screws. The head has different tool tightening grooves such as straight, cross, and hexagonal.
What are chamfer screws?
Chamfered screws have a round at the top of the thread and a chamfer at the bottom of the thread.
What are the benefits of chamfered screws?
The purpose of chamfered or countersunk holes in internal threaded holes is usually to avoid the generation of raised burrs and promote better fixation between the adapter and the flat workpiece surface. And reduce the possibility of deformation of internal thread screws due to burrs
What is the angle for chamfered screws?
The angle of the Chamfered Hexagon Socket Screws is 45 degrees or 55 degrees.
What is the difference between flat head screws and countersunk head screws?
|
Name |
Flat head screw |
Countersunk head screw |
|
Picture |
|
|
|
Differences in appearance |
The head of the flat head screw and the bolt connection part are at right angles |
the countersunk head screw extends from the head of the screw to the screw rod in a tapered manner |
|
Difference in combination methods |
because the connection is at a 90-degree angle, elastic washers and flat washers can be added according to actual usage conditions |
For countersunk-head screws, only tapered washers can be added; |
|
Difference in use |
Flat head screws can go deep into the inside of the countersunk hole or be exposed on the outside |
Countersunk head screws are generally only on the inside |
|
Used in construction sites and other engineering situations |
Mostly used after installation, and the surface of the component must not have any raised areas. |
Product Specification
|
D |
M3 |
M4 |
M5 |
M6 |
M8 |
M10 |
M12 |
M14 |
M16 |
M18 |
M20 |
M22 |
M24 |
|
|
P |
0.5 |
0.7 |
0.8 |
1 |
1.25 |
1.5 |
1.75 |
2 |
2 |
2.5 |
2.5 |
2.5 |
3 |
|
|
Dk |
max |
6 |
8 |
10 |
12 |
16 |
20 |
24 |
27 |
30 |
33 |
36 |
36 |
39 |
|
min |
5.7 |
7.64 |
9.64 |
11.57 |
15.57 |
19.48 |
23.48 |
26.48 |
29.48 |
32.38 |
35.38 |
35.35 |
38.38 |
|
|
e |
min |
2.3 |
2.87 |
3.44 |
4.58 |
5.72 |
6.86 |
9.15 |
11.43 |
11.43 |
13.72 |
13.72 |
16 |
16 |
|
S |
max |
2.1 |
2.6 |
3.1 |
4.12 |
5.14 |
6.14 |
8.175 |
10.175 |
10.175 |
12.212 |
12.212 |
14.212 |
14.212 |
|
min |
2.02 |
2.52 |
3.02 |
4.02 |
5.02 |
6.02 |
8.025 |
10.025 |
10.025 |
12.032 |
13.032 |
14.032 |
14.032 |
|
|
t |
max |
1.2 |
1.8 |
2.3 |
2.5 |
3.5 |
4.4 |
4.6 |
4.8 |
5.3 |
5.5 |
5.9 |
8.8 |
10.3 |
|
min |
0.95 |
1.55 |
2.05 |
2.25 |
3.2 |
4.1 |
4.3 |
4.5 |
5 |
5.2 |
5.6 |
8.44 |
9.87 |
|
|
L |
8-40 |
8-40 |
10-60 |
12-60 |
16-100 |
20-100 |
25-100 |
25-100 |
30-100 |
30-100 |
30-100 |
35-100 |
35-100 |
|
DIN7991 hexagon socket countersunk head screws are available in carbon steel and stainless steel.
The performance grades of carbon steel hexagon socket head screws are 8.8, 10.9, and 12.9. The standard can be referred to GB3098.1. Carbon steel materials generally require surface treatment, the most common ones are oxidation, electroplating, etc. If you need other surface coatings or surface treatments, please let us know.
Stainless steel beveled Chamfered Hexagon Socket Screws are mostly made of SUS304 and SUS316, which have strong corrosion resistance and heat resistance. SUS304 has a medium work hardening rate and is suitable for general cold working and drawing; SUS316 has stronger corrosion resistance than 304 and has better corrosion resistance and pitting resistance.
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