China hex head self drilling screw wholesale supplier

  • China hex head self drilling screw
  • China hex head self drilling screw
  • China hex head self drilling screw
Hex Head Self drilling Screw
  • 7-35 DAYS
  • 5000 TONS

The hex head self-drilling screw is used in the assembly to drill the hole and simultaneously form or cut the thread connected to itself, and the screw itself does not deform and trip.

Hex Head Self drilling Screw

Product Parameters

China hex head self drilling screw


ASME B18.6, DIN7504K DIN7504PDIN7504N




Carbon Steel, Alloy Steel, Stainless Steel


10-180mm (3/8”- 7”)

Head type:

hex , flat, pan, truss, round, hex washer, Oval, pan framing, bugle, fillister

Drive type:

Phil, slotted, Phil & slotted combination, hex socket

Screw type:



Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G


bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand


Structural Steel; Metal Buliding; Oil&Gas; Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating


Caliper, Go&No-go gauge, Tensile test machine, Hardness tester, Salt spraying tester, H.D.G thickness tester, 3D detector, Projector, Magnetic flaw detecter

Supply Ability:

5000 tons per month


500kgs for each specification

Trade Term:


Our advantage:

One-stop shopping; 
High quality; 
Competitive price; 
Timely delivery; 
Technical support; 
Supply Material and Test Reports; 

Samples for free


Please lets know the Size, quantity, Material or Grade, surface, If it is special and Non-standard products, please supply the Drawing or Photos or Samples to us


Product name

Self Drilling Screws

Place of origin


Brand Name



Qingdao or according to requirement

Delivery time

Normally in 7-35 days, according to quantity


500kgs for each specification


According to customer’s requirement



Hex head self-drilling screw

1. After hitting the hexagonal self-drilling screw into the hole on the ground or wall surface, tighten the nut on the self-drilling self-tapping screw with a wrench, the screw goes out, and the outer metal sleeve does not move, so the bottom of the screw The big head will open the metal sleeve and make it fill the whole hole. At this time, the hexagonal head will not be able to pull out the self-drilling screw;

2. Hex head self-drilling screw is a kind of special threaded connection used to fix the air pipe branch, crane and bracket on the wall, floor and column. It consists of countersunk bolts, expansion pipes, flat washers and spring washers. Hexagon nut is used. When using, firstly use the impact drill (hammer) on the corresponding size hole on the fixed body, then insert the bolt and expansion tube into the hole. Tighten the nut to make the bolt, the expansion tube, the mounting piece and the fixing. The expansion between the bodies becomes one;

3. The hexagonal head self-drilling screw is composed of a screw and an expansion tube. The screw tail is conical. The large diameter of the cone is larger than the inner diameter of the expansion tube. When the nut is tightened, the screw moves outward, and the conical part is moved by the axial movement of the thread. Moving, and then forming a large positive pressure on the outer circumferential surface of the expansion tube, and the angle of the cone is small, so that the wall, the expansion tube and the cone form a friction self-locking, thereby achieving a fixing effect;

4. The spring pad on the hexagonal head self-drilling screw is a standard part. Because its opening is staggered and elastic, it is called a spring washer. The function of the spring washer is to pierce the nut and the pad with the sharp sharp corner of the wrong mouth to prevent the nut. Loose.

Quality control


our company strictly complies with ISO9001 system. All our products are subjected to strict test and inspection in each process by the workers periodically, starting from the raw materials delivered to the factory.

Test Report  

If you need, the test report form the third part is available

 China hex head self drilling screw

Packaging Details:


30,40,50CTNS/PALLET 15KGS/CTN0.35
36,48CTNS/PALLET  (10-22)KGS/CTN0.36

B. According to customer special demand.

We also accept customization order according to your samples and drawings

If you have other questions or concerns, please feel free to contact us.

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