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Products > Metal Fasteners > Screw > Stainless Steel Flat Head Self Drilling drill Screw
Product name : Stainless Steel Flat Head Self Drilling drill Screw
Item : MTSCRFLDST
material : Stainless Steel
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  Details:
Standard: DIN7504 (Any kind of screw Driver, you can choose it from our following picture), ISO 15482-1999, GB /T 15856.2-1995
Material: SUS301,304,18/8,0Cr18Ni9,X5CrNi1810,X10Cr13,410S21,if you need to use other stainless steel, please let us know.
Heat Treatment: None for normal, If you have special hardness requirement, please let us know.
Surface Hardness:220HV is Normal, 750HV max after Quench with SUS410
Finish:None.
Head:Flat
Tensile strength:700N/mm2
Thread Direction:Normal is right hand/dextrorotation, if you want left hand, please let us know.
Refer to document as below:
                 
Stainless Steel Flat Head Self Drilling Screw.pdf 

 
 Stainless Steel Flat Head Self Drilling Screws belong to Self-Drilling Screws, also known as Tek screws, eradicate the need for a pre-drilled hole and allow drilling and tie to be done in the same motion. Self-drilling screws are used to create a hole and form their own mating thread in the process.
 
"Stainless Steel" - With the addition of 12% chromium to iron, stainless steel is formed. The chromium protects the iron against most corrosion or red colored rust; thus the term "stainless steel". The ability of stainless to form a thin layer of protection on its outside surface, called a "passive film", is its most important characteristic in preventing corrosion.
 
"18-8" - 300 series stainless steel having approximately (not exactly) 18% chromium and 8% nickel. The term "18-8" is used interchangeably to characterize fasteners made of 302,302HQ,303,304,384, XM7, and other variables of these grades with close chemical compositions. There is little overall difference in corrosion resistance among the 18-8 types, but slight differences in chemical composition do make certain grades more resistant than others against particular chemicals or atmospheres.
 
Austentic - Refers to 300 series stainless, the most popular of the stainless alloys accounting for 85%-90% of stainless fasteners sold Named for sir Robert Williams Austen, an English metallurgist, austentic stainless is a crystal structure formed by heating steel, chromium, and nickel to a high temperature where it forms the characteristics of 300 series stainless steel.
  Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. The Phillips drive style was originally designed so that the driver would slip out under extreme torque, preventing over-tightening and damage to the fastener or the material. Self-Drilling Points are excellent for use with sheet metal.
 
 You can refer to below chart/list of Screw head/Thread ending
 
Thread ending:

And below is the common drawing for this kind:

Below chart show some typical dimensions of them, you can refer it, or can you change it for your own design, if you want know more standard dimensions of screw , you can contact us.
Item Standard d1(mm) L(mm) d2 max.(mm) k~(mm) m~(mm)
3.5X13 DIN7504/ISO 15482/GB /T 15856.2 ST3.5 13 6.8 2.1 4.2
3.5X16 DIN7504/ISO 15482/GB /T 15856.2 ST3.5 16 6.8 2.1 4.2
3.5X19 DIN7504/ISO 15482/GB /T 15856.2 ST3.5 19 6.8 2.1 4.2
3.5X22 DIN7504/ISO 15482/GB /T 15856.2 ST3.5 22 6.8 2.1 4.2
3.5X25 DIN7504/ISO 15482/GB /T 15856.2 ST3.5 25 6.8 2.1 4.2
3.9X13 DIN7504/ISO 15482/GB /T 15856.2 ST3.9 13 7.5 2.3 4.6
3.9X16 DIN7504/ISO 15482/GB /T 15856.2 ST3.9 16 7.5 2.3 4.6
3.9X19 DIN7504/ISO 15482/GB /T 15856.2 ST3.9 19 7.5 2.3 4.6
3.9X22 DIN7504/ISO 15482/GB /T 15856.2 ST3.9 22 7.5 2.3 4.6
3.9X25 DIN7504/ISO 15482/GB /T 15856.2 ST3.9 25 7.5 2.3 4.6
3.9X32 DIN7504/ISO 15482/GB /T 15856.2 ST3.9 32 7.5 2.3 4.6
4.2X13 DIN7504/ISO 15482/GB /T 15856.2 ST4.2 13 8.1 2.5 4.7
4.2X16 DIN7504/ISO 15482/GB /T 15856.2 ST4.2 16 8.1 2.5 4.7
4.2X19 DIN7504/ISO 15482/GB /T 15856.2 ST4.2 19 8.1 2.5 4.7
4.2X22 DIN7504/ISO 15482/GB /T 15856.2 ST4.2 22 8.1 2.5 4.7
4.2X25 DIN7504/ISO 15482/GB /T 15856.2 ST4.2 25 8.1 2.5 4.7
4.2X32 DIN7504/ISO 15482/GB /T 15856.2 ST4.2 32 8.1 2.5 4.7
4.2X38 DIN7504/ISO 15482/GB /T 15856.2 ST4.2 38 8.1 2.5 4.7
4.2X45 DIN7504/ISO 15482/GB /T 15856.2 ST4.2 45 8.1 2.5 4.7
4.8X16 DIN7504/ISO 15482/GB /T 15856.2 ST4.8 16 9.5 3 5.1
4.8X19 DIN7504/ISO 15482/GB /T 15856.2 ST4.8 19 9.5 3 5.1
4.8X22 DIN7504/ISO 15482/GB /T 15856.2 ST4.8 22 9.5 3 5.1
4.8X25 DIN7504/ISO 15482/GB /T 15856.2 ST4.8 25 9.5 3 5.1
4.8X32 DIN7504/ISO 15482/GB /T 15856.2 ST4.8 32 9.5 3 5.1
4.8X38 DIN7504/ISO 15482/GB /T 15856.2 ST4.8 38 9.5 3 5.1
4.8X45 DIN7504/ISO 15482/GB /T 15856.2 ST4.8 45 9.5 3 5.1
4.8X50 DIN7504/ISO 15482/GB /T 15856.2 ST4.8 50 9.5 3 5.1


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