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Self-Drilling Tapping Screws With Black Washer for Roof Cornice
Drive type
Hex flange
Application
Steel Stucture Envelope System
Surface treatment
Zinc Alloy Coated
MOQ
10000pcs
Packing
Box/Carton/Pallet
Quality
100% QC Test
Feature
Actual corrosion resistance exceeds carbon steel coated screws
Customized support
Contact Customer Service
Place of Origin
Zhejiang, China
Model Number
12#-14*55
Product Description
SUS410 Hex Flange Head Self Drilling Screw 12#-14*55 Rustproof Coating
TEK Stainless Steel 410 Series Products. products through special heat treatment, screw surface hardness up to more than HV750, core hardness between HV350 - HV450, whether it is surface hardness or core hardness are more than carbon steel screws, and its reasonable hardness ladder from the surface to the core to ensure the ideal combination of strength and toughness.
SUS410 is martensitic stainless steel, its molding performance is good, can be heat treated; With high hardness, high strength, high temperature resistance, suitable for outdoor rain environment and corrosive environment; Although there will be red rust, but its corrosion rate is 0.01mm/ year, only 1/100 of ordinary carbon steel, even if the surface of the red rust, as long as gently wipe or polish, the surface will restore the inherent metallic luster.
' TECHNIK ' Coating
The product's surface coating is treated by zinc alloy coating, conforming to AS3566.2-2002 anticorrosion technology standard, metallographic section micro density 8 level requirements, ensuring coating adhesion force. Bottom coated zinc alloy, 360 degree barrel plating. Surface coated aluminum epoxy polymer.
1. Class 3 protection grade: The zinc content of coating 75-80%, the other elements are 20-25%, coating thickness is more than 25µ , salt spray test can reach more than 1000H without red rust, acid rain by more than 15 cycles.
2. Class 2 protection grade: The zinc content of coating 100%, coating thickness of 12-19µ , salt spray test can reach more than 240H without red rust.
High corrosion resistance-1000 hours without red rust
Coating
Rustproof Structure
1st layer
Metalic zine layer
The steel/iron substrate is protected from corrosion by the self-sacrificial galvanic effect of zinc coating.
2nd layer
Chemical conversion coating layer
Rustproof performance is improved, as the chemical conversion inactivates the zinc plated surface and attributes to tight adhesion between chemically converted layer and paint-layer
3rd layer
Baked ceramic surface coating layer
Instrusion of corrosive factors are intercepted by the strong paint film made of ceramic materials.
Super corrosion resistance 2000 hour salt spray without red rust
High corrosion resistance
Salt spray test for more than 2000 hours
No hydrogen brittleness
The base material is stainless steel, the treatment process has no pickling, millisecond. Risk of hydrogen embrittlement
Environmental protection
Do not contain harmful substances, such as chromic acid, lead, cadmium.
Subzero treatment
Low temperature 200℃ process will not result in a material change
Our samples are free, the buyer need to bear the freight cost.
MOQ:
100-200KG
Delivery Time:
30~60 Days
Packing:
Bulk, Small box , Poly bag, Carton and Pallet, etc. We can make your own package.
Certificate:
ISO, SGS, ROHS
Pricing Term:
EXW, FOB, CIF, CNF, DDU, etc
Payment Term:
We can accept T/T(30% in down payment, balance before shipment), L/C, etc.
About Unitek
Company Show
Production & Delivery
FAQ
Q: Are you a manufacturing company or trading company?
A: We are a professional manufacturer of fasteners with more than 20 years of export experience.
Q: Can you accept small orders?
A: Do not worry. Please feel free to contact us, in order to give our clients more convenience, we accept small order.
Q: Can you print our own logo or make customization?
A: Yes, we can make it according to your request.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. If we have no stock, it will be 25-35 days. The specific delivery time is determined according to your quantity.
Q: What is your payment term?
A: Generally, 30% T/T in advance, balance before shippment or against B/L copy. Please feel free to contact us for detailed information negotiation.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2010
Total Annual:
30000000-50000000
Employee Number:
120~150
Ecer Certification:
Verified Supplier
UNITEK adheres to the quality principle of "Meeting customer needs, Pursuing excellence, Innovating scientifically, and Continuously improving". We also embrace the concept of "Dedicated to promoting energy efficiency and environmental sustainability in business for the benefit of hum... UNITEK adheres to the quality principle of "Meeting customer needs, Pursuing excellence, Innovating scientifically, and Continuously improving". We also embrace the concept of "Dedicated to promoting energy efficiency and environmental sustainability in business for the benefit of hum...