Self Drilling Screws

p>A Self-drilling screw is, essentially is a self-tapping screw with the added feature of a drill point end. Self-drilling screws eliminate the need for a pre-drilled pilot hole as they perform the drilling, tapping and fastening in one action. The hardened steel fixings are generally used when fixing metal to metal or metal to timber.


There are a few key things to think about when deciding what the best screw is for any application. With self-drilling the main points are;


Flute Length


The flute length on a self-drilling screw is the small section at the end of the fixing. The length will determine the thickness of the metal the fastener can be used with. The flute is the part of the self-drilling screw that sends the drilled material out from the hole. If this area becomes blocked the cutting action will eventually stop. Failure to rectify can result in overheating


Drill Point


When deciding on the length of the fixing, the length of the material the screw has to go through must be carefully thought about. The drill point is the small unthreaded section at the end of the screw. If the thread engages before the drill point is all the way through the screw will become damaged or break.


Types of self-drilling screws


Self-drilling screws are available in the same head shapes and drive types as self-tapping screws. The material and finish or plating of the screw are dependent on the materials the screws will be used with and the environment they will be subjected to.


Head Shapes


  • Hexagon Washer Head

  • Hexagon Flange Head

  • Countersunk

  • Pan Head

  • Button Head

Drive Types


  • Hexagon

  • Cross

  • Pozi

With regards to the thread type, there are two main categories available metric (mm) thread and UTS (Unified Thread Standard).


Applications


Self-drilling screws are ideal for applications where the fastening of two materials is required. As the drilling and fastening is completed in one motion self-drilling screws are particularly useful in a variety of environments where accuracy and speed are of the essence. Some of the most common are;


  • Cladding and roofing

  • Steel frames

  • Metal and wood frames

  • Car production lines

  • Sheet metal work

  • HVAC ducting

...
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Beskrivning Pris Length Metric Material Thread Size mm Thread Size UTS Thread Size Metric Length Imperial Drive Type Finish Head Shape Stainless Steel Type
RS-artikelnummer 521-535
VarumärkeRS PRO
62,66 kr
1 Bag of 100
Påse(ar)
6.5mm Stainless Steel - No. 4 - 1/4in Pozidriv Plain Pan A2 304
RS-artikelnummer 546-5604
VarumärkeRS PRO
25,95 kr
1 Box of 100
Låda(or)
6.5mm Steel - No. 4 - 1/4in Pozidriv Bright Zinc Plated Pan -
RS-artikelnummer 546-5935
VarumärkeRS PRO
67,52 kr
1 Bag of 100
Påse(ar)
13mm Steel - No. 6 - - Pozidriv Bright Zinc Plated Pan -
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