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Carbon Steel Self-Drilling Screws 5.5 x 25mm 100 Pack (54743)

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Carbon Steel Self-Drilling Screws 5.5 x 25mm 100 Pack (54743)

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

  • Washer
  • Suitable for Outdoor Use

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View all: Unbranded Self Drilling Screws

£6.29INC VAT

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Carbon Steel Self-Drilling Screws 5.5 x 25mm 100 Pack is rated 4.8 out of 5 by 186.
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Rated 5 out of 5 by from Excellent ‘tek’ screws Used 100 of these to fit 5 pvc corrugated roofing sheets to a tube clamp frame. Drilling a 2mm pilot hole first then these with an impact driver made light work of the job. Tested with the recent weather in high winds and none have moved. Great product, will use again
Date published: 2020-10-21
Rated 5 out of 5 by from Great Easily cut own thread using an impact driver & bit, used on corrugated roof sheet and worked well.
Date published: 2020-10-16
Rated 5 out of 5 by from Excellent Absolutely perfect. Had to install some isolaters onto a steel post. Using a 8mm bit on my makita battery drill. And these fixings went through a 6mm steel effortlessly. It was so easy. It made my job so quick and easy. I would definitely recommend and give a 10/10. And also mega value for money.
Date published: 2020-10-11
Rated 3 out of 5 by from Roof screw Not very sharp for drilling corrugated tin sheets.
Date published: 2020-10-07
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What size pilot hole would be suitable and what size hex socket?

I intend to use these to fasten joist hangers direct to a 75mm mild steel box section 3 mm thick. Need to know what size pilot hole. Thank you.
Asked by: Bawtryjohn
Hello Bawtryjohn, These will drill their own hole but if you want to drill a pilot hole then you would need one slightly smaller than the diameter of the screw so 4-4.5mm would be suitable. Thank you for using Q&A
Answered by: Cwalm
Date published: 2020-09-24

Are these salt protected?

Asked by: Luke146
Hello Luke146, I can confirm that these are not salt protected. Thank you for using Screwfix Q&A. A.K.C.
Answered by: AliScrewfix1
Date published: 2020-09-23

Would this support a wought iron railing i.e this screw holding in a L bracket from 2mm thick post to railing?

Asked by: Supersticky
Hello Supersticky, I am afraid that we would not be able to advise and would recommend that you speak to a qualified tradesperson for guidance. Thank you for using Q&A
Answered by: SWake
Date published: 2020-09-17

Do I need to pilot hole?

I need to fix brick ties to a 200SHS, I’m assuming I’d need to pilot the section first? If so what size pilot hole would be required?
Asked by: Paulw87
Hello Paulw87, This product is designed to drill it's own pilot hole. If you want to drill one yourself then you can use a 4mm drill bit. Thank you for using Q&A (CW)
Answered by: Cwalm
Date published: 2020-09-04

What is the length of the screw section (so excluding the head)?

Does the length - 45mm - refer to the full length of the fixing or just the bit that goes into the wood? I want to know how deep this fixing will go please?
Asked by: ANeil
Hello ANeil, The 45mm refers to the threaded section and not the overall length of the fixing. Thank you for using Q&A SW
Answered by: SWake
Date published: 2020-08-14
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Specification
Colour BZP
Construction Material (Screws) Carbon Steel
Drive Type Hex
Head Type Washer
Indoor/Outdoor Usage Indoor
Manufacturer Guarantee 1 Year Guarantee
Pack Size 100
Pieces in Pack/Case 100
Product Diameter 5.5 mm
Product Length 25 mm
Product Type Self-Drilling Screws
Screw Diameter (mm) 5.5 mm
Screwdriver Type Hex
Suitable Use Type Suitable for Outdoor Use
Thread Length Fully Threaded