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12 Tapping Stainless Steel Metal Screws Hex Washer Head Self Drilling Screws

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City: Dongguan
Province/State: Guangdong
Country/Region: China
Tel: 86-769-82601418
Contact Person:
Mr David

12 Tapping Stainless Steel Metal Screws Hex Washer Head Self Drilling Screws

Brand Name : VDL
Model Number : SHS4825
Certification : ISO 9001
Place of Origin : China
MOQ : Negotiation
Price : Negotiation
Payment Terms : L/C, T/T, Western Union , Paypal
Supply Ability : 500 , 000 pcs per month
Delivery Time : 30 days
Packaging Details : 10000 pcs each carton with dimension 20 X 20 X 22 cm , 500 cartons to a 20 ft container
Material : Stainless Steel 304
Hardness : HRC 65
Diameter : #12
Length : 3/4
Drive : Ex Hex
Head : Hex
Point : Drilling
TPI : 16
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12 Tapping Stainless Steel Metal Screws Hex Washer Head Self Drilling Screws

With good stainless steel material and perfect working performances , stainless steel self drilling screws are used to various metal sheets and metal proofs in building .

Stainless steel self drilling screws with hexagon head that are driven by a hex socket pipe or spanner for easy operation ; Normally , self drilling screws with teck points which are completely different from other screw’s points , this kind point with fast drilling performance and improve efficiency much .

Specific Dimensions

Self drilling screws with tapping threads based on standard DIN7504 K

Head diameterdk12.6
Thread lengthL3/4
Shaft diameterd#12
Head heightK5.5
Hex cross widths9.5
PitchP11 per inch
Thread typeST

Typical Features

● Good ductility

● High tensile strength

● No magnet

● Corrosion resistant

● Fine roughness


Stainless steel self drilling screws are used for securing metal sheets , the thickness of metal sheets should be suitable for related specification of screw .

Screw size#12
Min. case Hardness600
Core Hardness Hv 0.3300~400
Min. Torsional Lb-in61
Drill point Point #Nr. 3
Test Plate Thickness0.062~0.068

Physical Performance

MaterialStainless steel
Property class18-8
Tensile strength σb (MPa)650
Yield Strength σs (MPa)320
Elongation δ5 (%)35
Reduction of area ψ (%)45
Density g/cm3)7.98


Stainless steel self drilling screws are polished surface with good brightness

Surface requestNo burrs and bright


1 , Choose a special electric driller for self drilling screws

2 , Adjust locator in electric driller to a proper posiztion for leading screws are to be driven to right position

3 , Check drilling rate of driller

Screw sizeDrilling rate RPM
3.5 ( 6 # )1500 - 2500
3.9 ( 7 # )1500 – 2500
4.2 ( 8 # )1500 - 2500
4.8 ( 10 # )1500 - 2500
5.5 ( 12 # )1000 – 1800
6.3 ( 14 # )1000 - 1800

4 , Choose attached screwdriver bit and drive screws into metal sheets .

If you take a single electric driller operated by hand , please note

① Don’t put more joint on locating device in electric driller
② Make sure the sheet thickness is suitable for the length of screw , or screws will be broken easily .
③ Don’t put more RMP that overs max RMP of electric driller , or the point of screws will be melt down .
④ Don’t choose conflicting model for screws .


Stainless steel self drilling screws are normally used to metal sheets

▲ Metal sheets on roof
▲ Metal wall sheet
▲ Fence
▲ Fender
▲ Furniture
▲ Brige
▲ Highway equipments


▲ Wide versatility
▲ Top material
▲ Quick installation
▲ Convenient operation
▲ Simple deign
▲ Recylable
▲ Eco-friendly
▲ Standard Sizes

Tips for installations

★ A screw gun with a depth sensitive nose piece that be used to install drillers ,the screwgun should be a min of 4 amps and a RPM range from 0 to 2500c
★ Adjust the screw gun nose piece to properly set the fastener
★ Damaged bit tips should be replaced
★ The fastener is fully setted when the head is flush with the work surface
★ The fastener have to penetrate beyond the metal structure a min of 3 picthes of threads
★ Put 13 kgs or so force on screw gun and keep force direction is same as the centr of drilling point

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