owing to excellent provider, a variety of top of the range items, competitive prices and efficient delivery, we appreciate a great status among our prospects. We are an energetic firm with wide market for Factory Cheap Hot China Carbon Steel Self-Drilling Screws 5.5*38mm, All products are manufactured with advanced equipment and strict QC procedures in order to guarantee top quality. Welcome prospects new and outdated to get hold of us for business enterprise cooperation.
owing to excellent provider, a variety of top of the range items, competitive prices and efficient delivery, we appreciate a great status among our prospects. We are an energetic firm with wide market for China Self Drilling Screws, Drilling Screws, We have now more than 10 years experience of production and export business. We always develop and design kinds of novel items to meet the market demand and help the guests continuously by updating our merchandise. We are specialized manufacturer and exporter in China. Wherever you are, be sure to join us, and together we’ll shape a bright future in your business field!

Product Name:self-drilling screw
Material:stainless steel/carbon steel.
Color:sliver/black/zinc
Standard: DIN ISO JIS GB ANSI ASME BSW
Grade:A2-70/A4-80/4.8/8.8/12.8
Package:
1. We have several sizes of packing dimensions, can be 20kg or 25kg per carton;
2. For large orders, we can design specific sizes of boxes and cartons;
3. Normal Packing: 1000pcs/500pcs/250pcs per small box. then small boxes into cartons.
4. Can provide special packings as clients requests;
Features:
 1. We supply credible products with high quality in timely delivery.
 2.All of our products are inspected by QC before packing
 3.Standard export package or according to your requirements.
How are self drilling screws measured?
They are measured from the top of the head to the tip. Hex and hex washer head screws and bolts, 
although flat on the top and the bottom, are measured from the bottom of the head. From that point 
to the tip is the length of the screw. Self drilling screws are measured all the way to the end of the 
drill point tip.
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.
What is the difference between self drilling and self tapping screws?

Self drilling screw: self-drilling screw connect componenets in one worek step:the drill ,from the thread and fasten .

This reduces the installation time,saves tool changes and costs for drills.

Self drilling screw: self -drilling screw are availablein,stianelss steel for weather-exposed areas and in zinc,plated  steel for unweathered areas.

These steel screws hace a head encapsulated by chemical.resistant stainless steel . a rubber-bonded  washer compresses to form a,watertight seal.

The save you time,and effort by drilling theri own holes and fastening in a single operation

owing to excellent provider, a variety of top of the range items, competitive prices and efficient delivery, we appreciate a great status among our prospects. We are an energetic firm with wide market for Factory Cheap Hot China Carbon Steel Self-Drilling Screws 5.5*38mm, All products are manufactured with advanced equipment and strict QC procedures in order to guarantee top quality. Welcome prospects new and outdated to get hold of us for business enterprise cooperation.
Factory Cheap Hot China Self-Drilling Screws, Drilling Screws, We have now more than 10 years experience of production and export business. We always develop and design kinds of novel items to meet the market demand and help the guests continuously by updating our merchandise. We are specialized manufacturer and exporter in China. Wherever you are, be sure to join us, and together we’ll shape a bright future in your business field!