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Heavy-Duty DIN 7504K Self-Drilling Fasteners | SUS 410 Grade for Roofing & Cladding
DIN 7504K Stainless Steel 410 Self-Drilling Screws with Hex Washer Head are high-performance industrial fasteners engineered for metal-to-metal applications. Manufactured from Grade 410 stainless steel, these screws feature a specialized drill point that eliminates the need for pre-drilling, providing efficient and secure fastening in a single operation.
Product Overview
Standard: DIN7504K
The DIN 7504K self-drilling screw is characterized by its hexagonal washer head and specialized drill point. Grade 410 is a martensitic stainless steel that can be heat-treated, making it significantly harder than 304 or 316 grades, specifically designed for demanding metal-to-metal applications.
Core Features
Exceptional Hardness: Grade 410 stainless steel can be hardened through heat treatment, allowing the screw to penetrate carbon steel sheets and harder substrates without tip failure.
Time-Saving Efficiency: Integrated drill point eliminates the need for pre-drilling and hole alignment, reducing installation time and labor costs.
Corrosion Resistance: Provides reliable protection against atmospheric corrosion, water, and mild chemicals, superior to standard carbon steel fasteners in humid environments.
High Torque Strength: Hexagonal head design ensures maximum torque transmission and prevents cam-out during high-speed installation with power tools.
Integrated Sealing: Often used with EPDM bonded washers to provide leak-proof seals, critical for outdoor and roofing applications.
Application Scenarios
Steel Construction & Metal Framing: Fastening metal sheets to steel purlins or sub-structures in industrial buildings.
Roofing & Cladding: Installation of metal roof panels and wall cladding systems where weather resistance and structural integrity are paramount.
HVAC Systems: Securing ductwork and mounting equipment components in heating and cooling systems.
Automotive & Machinery: Assembly line applications requiring high-speed fastening into metal frames.
Solar Energy Systems: Mounting solar panel brackets to aluminum or steel support rails.
Technical Specifications
螺纹规格
ST2.9
ST3.5
(ST3.9)
ST4.2
ST4.8
(ST5.5)
ST6.3
P | 螺距
1.1
1.3
1.3
1.4
1.6
1.8
1.8
a | max
1.1
1.3
1.3
1.4
1.6
1.8
1.8
c | min
0.4
0.6
0.6
0.8
0.9
1
1
dc | max
6.3
8.3
8.3
8.8
10.5
11
13.5
min
5.8
7.6
7.6
8.1
9.8
10
12.2
e | min
4.28
5.96
5.96
7.59
8.71
8.71
10.95
k | max
2.8
3.4
3.4
4.1
4.3
5.4
5.9
min
2.5
3
3
3.6
3.8
4.8
5.3
kw | min
1.3
1.5
1.5
1.8
2.2
2.7
3.1
r | max
0.4
0.5
0.5
0.6
0.7
0.8
0.9
s | max
4
5.5
5.5
7
8
8
10
min
3.82
5.32
5.32
6.78
7.78
7.78
9.78
dp
2.3
2.8
3.1
3.6
4.1
4.8
5.8
Drilling range
0.7~1.9
0.7~2.25
0.7~2.4
1.75~3
1.75~4.4
1.75~5.25
2~6
DIN 7504K Stainless Steel 410 Self-Drilling Screws with Hex Washer Head
Packaging Options
Carton Packaging
Bolts are packed in neutral packaging boxes, with standard quantities arranged in small cartons. The exact number of units per carton will be confirmed with the customer to align with their specific requirements. Customized packaging configurations are available upon request.
Outer Carton Box Packaging
The small cartons are then consolidated into larger master cartons for secure transportation and storage. The quantity per master carton can be customized based on client specifications or aligned with standard logistical requirements.
Pallet Packaging
The palletized units are securely wrapped with waterproof film and reinforced with packaging straps. Customer-specific shipping marks or labels are affixed to each pallet, ensuring clear identification and compliance with logistics requirements. This final packaging stage guarantees weather-resistant protection and stability during transportation.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2012
Total Annual:
5000000-6000000
Employee Number:
45~53
Ecer Certification：
Verified Supplier
Ningbo Yongbiao Fastener Manufacturing Co., Ltd. is located in Ningbo, the second largest port city in China. The factory is 50 kilometers away from Ningbo Port and can reach the sea freight warehouse in one hour, with very fast logistics. The company was founded in 2012 and after years of hard work... Ningbo Yongbiao Fastener Manufacturing Co., Ltd. is located in Ningbo, the second largest port city in China. The factory is 50 kilometers away from Ningbo Port and can reach the sea freight warehouse in one hour, with very fast logistics. The company was founded in 2012 and after years of hard work...
