| Customization: | Available |
|---|---|
| Material: | Stainless Steel/Carbon |
| Type: | Hexagon Head/Round Head/Square Head |
|
Still deciding? Get samples of US$ 0/Piece
Order Sample
|
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
|---|
| Payment Methods: |
|
|---|---|
| Support payments in USD |
| Secure payments: | Every payment you make on Made-in-China.com is protected by the platform. |
|---|
| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
|---|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Bolt is a kind of fastener composed of head and screw (cylinder with external thread). It needs to be used with nut to fasten and connect two parts with through holes. It is an anchoring component that anchors the connected parts to the hardened concrete substrate.
The performance grades of bolts for steel structure connection are divided into more than 10 grades, including 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9 and 12.9. Among them, bolts of grade 8.8 and above are made of low-carbon alloy steel or medium carbon steel and heat treated (quenched and tempered), which are generally referred to as high-strength bolts, and the rest are generally referred to as ordinary bolts. The performance grade of bolts is composed of two numbers, which respectively represent the nominal tensile strength value and yield strength ratio of bolt materials.
For example:
The meaning of bolts with performance level of 4.6 is:
1. The nominal tensile strength of bolt material reaches 400MPa;
2. The yield ratio of bolt material is 0.6;
3. Nominal yield strength of bolt material reaches 400 × 0.6=240mpa grade
High strength bolts with performance grade of 10.9 can meet the following requirements after heat treatment:
1. The nominal tensile strength of bolt material reaches 1000MPa;
2. The yield ratio of bolt material is 0.9;
3. Nominal yield strength of bolt material up to 1000 × 0.9=900mpa grade
The strength grades of 8.8 and 10.9 refer to the shear stress resistance grades of bolts of 8.8gpa and 10.9gpa
8.8 nominal tensile strength 800n/mm2 nominal yield strength 640n/mm2
Generally, the strength of bolts is expressed by "x.y",
X*100= tensile strength of this bolt,
X*100* (y/10) = yield strength of this bolt
(because according to the identification: yield strength / tensile strength =y/10)
Such as level 4.8
Then the
Tensile strength: 400MPa
Yield strength: 400*8/10=320mpa
|
X
|
Z
|
Specification
|
Part No.
|
Material
|
Surface
|
Weight
|
|
20
|
17
|
M8X20
|
MD-HB-A1001
|
Carbon steel
|
Zinc/Nickel plated
|
13.00g
|
|
25
|
22
|
M8X25
|
MD-HB-A1002
|
Carbon steel
|
Zinc/Nickel plated
|
14.50g
|
|
30
|
27
|
M8X30
|
MD-HB-A1003
|
Carbon steel
|
Zinc/Nickel plated
|
16.00g
|
|
40
|
37
|
M8X40
|
MD-HB-A1004
|
Carbon steel
|
Zinc/Nickel plated
|
19.00g
|
|
60
|
57
|
M8X60
|
MD-HB-A1005
|
Carbon steel
|
Zinc/Nickel plated
|
25.00g
|
){kind=link}