Stainless steel 410 304 316 ST4.8* 80MM ST 4.8*100MM CSK head Self
Tapping Metal Screws
As well as the standard self tapping thread forms another type is
available known as a thread forming screw. These screw into a
pre-drilled hole and form an actual recognised screw thread similar
to that provided by a separate machine tapping operation ie M4, M5
Self tapping screws are specially designed screws which produce
their own mating thread into the material used as they are being
applied into a pre-drilled or punched or moulded holes.
Mainly used in thin sheet material they can also be used in some
soft plastics and Aluminium.
Main advantages are easier and quicker assembly (no holes to tap as
with machine screws) good resistance to vibration due to closeness
of thread engagement and access is only required from one side.
Standard self tapping screws have a pointed end Type AB (Form C)
which gives a lead into the hole provided. A limited range is also
available with a blunt end Type B (Form F) these are mainly used in
blind hole applications such as Aluminium castings etc.
Drives available tend to be Pozidrive cross recess or 6 lobe TX
drive. Slotted drives are still available on request but supplies
can be difficult as the former drives are more popular due to ease
of automatic assembly and driver slippage (Cam out)
Common Head styles are Pan, Countersunk, Raised Countersunk.
Hexagon head type also available. A cylindrical Socket (allen key)
drive is also available in a limited range of sizes.
Lastly there are screws known as Self Drilling Screws. These screws
have an integral drill point on the end. They then both drill tap a
thread into Aluminium in one operation.
|D||P||a max||dk max||k max||y||hole min||hole max|
|Material||Stainless steel (ss416, ss410, ss316, ss 304, ss201)|
|Surface||Plain, nickel plated, passivatio|
|Mechanical properties||A2-70, A4-80|
|Packing||Bulk packing and box packing and according to customer's requested
then in pallet.|
1.Paper Carton Size: 25*16*25CM
2.Wooden Pallet/ Wooden Case Size: 110*90*80CM
3.Color Printed Box&Cartons can be made per customers' desire.