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{"title":"DIN Hex Flange Head Self Drilling Screw with EPDM Washer","imgUrl":"https:\/\/img.chinax.com\/nimg\/c0\/01\/04c076903585ea6c8d9c9d249466-200x200-1\/din_hex_flange_head_self_drilling_screw_with_epdm_washer.jpg","attrs":{"Brand Name":"YongBiao","Model Number":"ST6.3*125mm","Certification":"ISO9001,TUV","Place of Origin":"ZheJiang China"}}
{"title":"ST6.3*100 DIN7504K 304 Stainless Steel Hexagon Head With Washer for Construction","imgUrl":"https:\/\/img.chinax.com\/nimg\/9a\/e2\/94162720fb44315ac2acb39f6489-200x200-1\/st6_3_2a100_din7504k_304_stainless_steel_hexagon_head_with_washer_for_construction.jpg","attrs":{"Brand Name":"YongBiao","Model Number":"14# 6.3*100mm","Certification":"ISO9001,TUV","Place of Origin":"ZheJiang China"}}
{"title":"GB15856.1 304SS Pan Head Cross Self Drilling Screw","imgUrl":"https:\/\/img.chinax.com\/nimg\/df\/9e\/464009f24cd36e3559264953d776-200x200-1\/gb15856_1_304ss_pan_head_cross_self_drilling_screw.jpg","attrs":{"Brand Name":"YB","Model Number":"Self-Drilling Screw","Certification":"ISO9001\/16949","Place of Origin":"ZheJiang China"}}
{"title":"DIN7504 Standard Corrosion Resistance Phillips Pan Head Self Drilling Screw","imgUrl":"https:\/\/img.chinax.com\/nimg\/f1\/2a\/b4cc8ae6ea698312fc99fe74ed32-200x200-1\/din7504_standard_corrosion_resistance_phillips_pan_head_self_drilling_screw.jpg","attrs":{"Brand Name":"YB","Model Number":"Self-Drilling Screw","Certification":"ISO9001\/16949","Place of Origin":"ZheJiang China"}}
{"title":"DIN7504 GradeA2 High Strength Cross Pan Head Self-Drilling Screw","imgUrl":"https:\/\/img.chinax.com\/nimg\/81\/e6\/12f1d9a355aea991d0f7cca6d4fd-200x200-1\/din7504_gradea2_high_strength_cross_pan_head_self_drilling_screw.jpg","attrs":{"Brand Name":"YB","Model Number":"Self-Drilling Screw","Certification":"ISO9001\/16949","Place of Origin":"ZheJiang China"}}
{"title":"Zinc Plated Hex Washer Head Self-Drilling Screws for Metal To Metal Fastening","imgUrl":"https:\/\/img.chinax.com\/nimg\/aa\/36\/be365f1ccced7f9b8026a0cff909-200x200-1\/zinc_plated_hex_washer_head_self_drilling_screws_for_metal_to_metal_fastening_compliant_with_gb15856_4_standard.jpg","attrs":{"Brand Name":"YONGBIAO","Model Number":"Cross Tapping Screw","Certification":"ISO 9001","Place of Origin":"China"}}
High-Strength Zinc Coated Self-Drilling Screws with EPDM Washer
DIN 7504K self-drilling screws are high-performance industrial fasteners featuring hexagonal washer heads and specialized drill points. Manufactured from Grade 410 stainless steel, these screws drill their own pilot holes, tap mating threads, and provide secure fastening in a single operation. Grade 410 martensitic stainless steel is heat-treatable, making it significantly harder than 304 or 316 grades, specifically designed for metal-to-metal applications.
Core Features
Exceptional Hardness: Heat-treated 410 grade stainless steel penetrates carbon steel sheets and harder substrates without tip burnout
Time-Saving Efficiency: Integrated drill point eliminates pre-drilling and hole alignment, reducing installation time and labor costs
Corrosion Resistance: Reliable protection against atmospheric corrosion, water, and mild chemicals in humid environments
High Torque Strength: Hexagonal head design ensures maximum torque transmission and prevents cam-out during power tool installation
Integrated Sealing: EPDM bonded washers provide leak-proof seals for outdoor and roofing applications
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
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 requiring weather resistance and structural integrity
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
Packaging Options
Carton Packaging
Bolts are packed in neutral packaging boxes with standard quantities arranged in small cartons. Exact unit quantities per carton are confirmed with customers to align with specific requirements. Customized packaging configurations available upon request.
Outer Carton Box Packaging
Small cartons are consolidated into larger master cartons for secure transportation and storage. Quantity per master carton can be customized based on client specifications or standard logistical requirements.
Pallet Packaging
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...
