Product name |
hex head drilling roofing screws with rubber washer |
Size |
5/16 m8,As per your request |
Standard |
ISO,GB,DIN,BS,ANSI,JIS,Nonstandard. |
Grade |
4.8/ 6.8/ 8.8/ 10.9/ 12.9 |
Available Material |
All carbon steel,Stainless steel 201/301/304, alloy steel,aluminum,copper,etc. |
Surface Treatment |
galvanised,Zn- Plated,Ni-plated,Black Anodize,etc. |
Advantage |
OEM / ODM / customized service provided |
Quality control |
ISO standard,100% Whole range inspection through the production |
Certificate | ISO9001,ISO14001, IATF16949,ROHS |
After-sales Service | We will follow up every customer and solve all your problems satisfied after sales |
Do you need a pilot hole for self drilling screws?
While self-tapping screws will tap a hole into a soft material, self-drilling screws are capable of drilling a hole into anything from metal to wood. This key difference is self-drilling screws have a tip like a drill bit, so they do not need a pilot hole.
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What is the difference between self drilling and self tapping screws?
Self-drilling screws eliminate the need for a pilot hole, but can tap as well. Self-tapping screws tap their own threads, but cannot drill through metal and require a pilot hole. These screws are not interchangeable, and mixing up the two can cause many headaches or possible failures in the field.
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Related products:
Q1: Why choose Chuanghe?
To provide our customers with first-class services in the supply of quality self drilling roofing screws minimizing costs.
Q2: How is quality ensured?
All our processes strictly adhere to ISO9001 procedures. We have strict quality control from producing to delivery. Our company had strong technology support, 80% of our colleagues are master or bachelor's degree. We have cultivated a group of managers who are familiar with product quality , good at modern concept of management.
Q3: Can You Strictly Follow The Tolerance on The Drawing And Meet The High Precision?
Yes, we can, we can provide high precision parts and make the parts as your drawing.
Q4: How should I order and make payment?
By T/T, for samples 100% with the order; for production, 30% paid for deposit by T/T before production arrangement, the balance to be paid before shipment. negotiation accepted.
Q5: What’s your Delivery Time?
Standard parts: 7-20days
Non-standard parts: 15-25days
We will make the delivery as soon as possible with the guarantee quality
Q6:How to Custom-made (OEM/ODM)?
If you have a new product drawing or a sample, please send to us, and we can custom-made the as your required. We will also provide our professional advices of the products to make the design to be more realized & maximize the performance.
Q7:Which mode of transport would be better?
In general, the product are heavy, we advice to make delivery by sea, Also we respect your views of other transportation as well.
How to order
Please provide the product you need parameters:
1. You need the product name
2. You need the amount of products
3. You need the material of products
4. You need the product specifications
Because it is convenient we can more quickly to give you a quotation. Thanks!
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