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Carbon Steel Self-Drilling Screws 5.5 x 38mm 100 Pack (66798)

BZP. For fixing corrugated sheet metal to steel constructions. Excellent quality for general exterior construction.

  • Washer
  • Suitable for Outdoor Use

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Carbon Steel Self-Drilling Screws 5.5 x 38mm 100 Pack is rated 4.8 out of 5 by 75.
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Rated 5 out of 5 by from A* Fixing - but no driver Nothing wrong with the fixing at all - very good. However, I asked through the Q&A whether it came with a Nut Driver and if not what size driver it required. SF said it needed a 10mm Hex Driver - WRONG, when they arrived I needed an 8mm Hex Nut Driver!! Very annoying. The 'Features' rating would have gained 5 stars if a nut driver had been included - which would have removed all the pain!
Date published: 2017-08-10
Rated 5 out of 5 by from Great fixing Quite easy to use fix into steel without any problem
Date published: 2017-08-01
Rated 5 out of 5 by from Brilliant Self-tappers Just what I needed to fix timber studwork to steels and at a brilliant price.
Date published: 2017-07-24
Rated 5 out of 5 by from Self Drilling Screws 5.5x22mm Good screws. I used them for attaching METAL FLASHINGS to Insulated metal claddings. Goes through metal sheet like timber screws into timber. Highly recommend.
Date published: 2017-06-12
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Is a Hex Driver included in the pack, and if not, what size Hex Driver do they require?

Asked by: Fitter01
Sadly Screwfix answered this question incorrectly. Having now received the screws they in fact take an 8mm Hex Nut Driver NOT a 10mm! The box lid on the fixings even says so!!
Answered by: Fitter01
Date published: 2017-08-10

I see the hex is 8mm, but what is the washer dia ? I need this to choose the correct cap fitting from coroline

Asked by: ryszui
Hello ryszui, The internal diameter is approximately 6m with it being approximately 16mm externally. Thank you for using Q & A. DC
Answered by: Dcoz
Date published: 2017-08-08

can i fix aluminium with this or will it corrode?

Asked by: Screwfixdoesmyheadin
Hello. These carbon steel self-drilling screws are bright zinc plated to prevent corrosion so will work with aluminium. Thank you for using Q&A, [BH].
Answered by: yeldarb
Date published: 2017-07-25

Are these OK for fixing to timber?

Product description says for fixing metal to metal but will they also work reliably fixing metal to wood?
Asked by: DIYblogger
Hello DIYblogger, We can only recommend these are suitable for metal to metal and would recommend using a screw specifically made for metal to wood. Thank you for using Q & A. DC
Answered by: Dcoz
Date published: 2017-06-13

What am I doing wrong

I bought these to fit blinds on a new builds. Trying to fix direct into steel lintels. I bought the hex drill bit too. I just can't seem to get a fix into the steel. Any advice would be appreciated, even down to drill settings etc.
Asked by: DIYdickie
DIYdickie. I'm unsure what you mean by getting a 'fix into the steel'. Do you mean you can't screw these into the lintel at all or the screws aren't biting, (pilot hole too big?). Please give us a call on 03330 112112, (lines are open 24/7) or email us on online@screwfix.com and we will try and help. Hope that helps. Thank you for using Q&A. MH
Answered by: marchington
Date published: 2017-05-25
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Specification
Construction Material (Screws) Carbon Steel
Head Type Washer
Manufacturer Guarantee 1 Year Guarantee
Pack Size 100
Pieces in Pack/Case 100
Product Diameter 5.5 mm
Product Length 38 mm
Product Type Self-Drilling Screws
Screw Diameter (mm) 5.5 mm
Screwdriver Type Hex
Suitable Use Type Suitable for Outdoor Use