SD500® Wafer 12-24 Self Drilling Screws CL3

SD500® Wafer 12-24 Self Drilling Screws CL3

Torx wafer head SD500® self-drilling screws are an ideal fixing for thick 12mm steel section such as purlins and hot-rolled steel. Used by builders and façade installers for exterior and cladding application. A torx recess drive also provides increased amount of positive drive, reducing cam-out and damage to screw heads.

Wafer head screws are also more aesthetically pleasing with their very flat head design at only 3mm high.

SD500 screws are a self drilling screw featuring an extended (no. 5) drill point for drilling through steel up to 12 mm. Designed to cut its own mating threads into the material to fasten securely in one action. To ensure effective installation the drill point must be completely drilled through the joining material.



Sub-total: / ex. gst.


  • Drill Capacity: 4.5–12mm of Steel
  • Driver Type: Philips P3
  • Installation Speed: 1800 RPM Max Drill Speed



  • Head Type: Wafer Head
  • Point Type: Self-Drilling No 5 Point
  • Material: Carbon Steel
  • Finish: Ruspert Class 3
  • Head Dia: 11.2mm
  • Head Height: 2.0mm



Ruspert Class 3: external use in mild moderate industrial or marine environments. Corrosivity categories C2 and C3 classified accordance with ISO 9223. AS 2331.3.1 salt spray test for 1000hrs, DIN 50018 for 15 cycles (kesternich test).

Product List
SKU Description Availability List Price Pack
More Information
More Information
Delivery SHIPS IN 1 - 2 DAYS
Coating & Plating Class 3 (Mech. Gal)
Material Grade Carbon Steel
Head Type Wafer
Driver Type Philips
Diameter / Gauge 12g
Point Type Drill Point No.5
Thread Type Fine
For use with Steel
Application Self Drilling Thick Steel, Steel-to-Steel Self Drilling
Use for Facade & Cladding, Outdoor Structure, Steel to Steel Connections
Technical Information
SKU Gauge x Length Coating Fix. Range Thread Driver
3S5WFC312038 12-24 x 38mm Class 3 12 / 15mm Full 12-24 x 38mm
3S5WFC312050 12-24 x 50mm Class 3 12 / 27mm Full 12-24 x 50mm