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Products > Metal Fasteners > Screw > Stainless Steel Flat Head Self Tapping Screw
Product name : Stainless Steel Flat Head Self Tapping Screw
Item : MTSCRFLSST
material : Stainless Steel
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  Details:
Standard: ISO7050 , DIN7982, GB/T846-1985(Philips Driver),DIN7972 ,ISO1482,GB/T5283-1985(Slotted Driver)
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 Tapping Screw.pdf

 
 Stainless Steel Flat Head Self Tapping Screw have a pointed end and widely spaced threads. They're self-starting in thin sheet metal, but in thicker materials a drilled hole is recommended.
 
"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)

m~(mm)

3.5xL9.5

DIN 7982

3.5

9.5

4.2

3.5xL13

DIN 7982

3.5

13

4.2

3.5xL16

DIN 7982

3.5

16

4.2

3.5xL19

DIN 7982

3.5

19

4.2

3.5xL22

DIN 7982

3.5

22

4.2

3.5xL25

DIN 7982

3.5

25

4.2

3.5xL32

DIN 7982

3.5

32

4.2

3.9xL9.5

DIN 7982

3.9

9.5

4.6

3.9xL13

DIN 7982

3.9

13

4.6

3.9xL16

DIN 7982

3.9

16

4.6

3.9xL19

DIN 7982

3.9

19

4.6

3.9xL22

DIN 7982

3.9

22

4.6

3.9xL25

DIN 7982

3.9

25

4.6

3.9xL32

DIN 7982

3.9

32

4.6

4.2xL9.5

DIN 7982

4.2

9.5

4.7

4.2xL13

DIN 7982

4.2

13

4.7

4.2xL16

DIN 7982

4.2

16

4.7

4.2xL19

DIN 7982

4.2

19

4.7

4.2xL22

DIN 7982

4.2

22

4.7

4.2xL25

DIN 7982

4.2

25

4.7

4.2xL32

DIN 7982

4.2

32

4.7

4.8xL13

DIN 7982

4.8

13

5.1

4.8xL16

DIN 7982

4.8

16

5.1

4.8xL19

DIN 7982

4.8

19

5.1

4.8xL22

DIN 7982

4.8

22

5.1

4.8xL25

DIN 7982

4.8

25

5.1

4.8xL32

DIN 7982

4.8

32

5.1


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