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Product Details

Self drilling screw with countersunk head and wing tip. For fixing timber to heavy section steel. Salt spray tested to 1,000 hours. Torx bit in each pack.

Technical Specification
Manufacture ID TFCH5585
Length (mm) 85
Diameter (mm) 5.5
Screwhead Countersunk
Delivery details
Order value: Under £10 £10 & over
Express usually Next Business Day before 6pm £5 Free
Turbo usually Next Business Day before 12 noon £10 £5
Remote areas standard delivery (2-4 days) £5 Free
Order Value: Under £25 Over £25 but less than £75 £75 & Over
£10 £5 Free

Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details
If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 10 minutes later.
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  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 8pm Mon-Sat (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
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TechFast Heavy Duty Self Drilling Torx Roof Screw 5.5 x 85mm (100 Pk) is rated 4.8 out of 5 by 8.
Rated 5 out of 5 by from great product Good price,rapid delivery
Date published: 2018-03-14
Rated 4 out of 5 by from Straight into an RSJ Bought to hang a chandelier in a clients house. It weighed over 30kg and there was only a steel joist to screw into. These did the job perfectly. The thing I will say, I only needed 8 to hold the light but I used 16 or so as i found that once you had used one to drill the pilot in the steel, it was not great at going and threading itself the rest of the way. Change to a new one after the pilot bit had finished and it worked great. I was unable to pilot the holes with a drill first due to location but that might have saved me a few screws.
Date published: 2018-03-01
Rated 5 out of 5 by from My saviour I needed to screw one inch wood planks to a five millimetre steel box frame to make two gates. 110 screws to each gate 220 in total. Plenty of recharging batteries but the job was done, and not one dud screw!
Date published: 2017-11-08
Rated 5 out of 5 by from Fit for purpose Bought these for fixing boards onto a trailer, did the job great, even had a torx bit in the pack to use
Date published: 2017-08-21
Rated 5 out of 5 by from Fix me up buttercup Bought because if got a screw loose
Date published: 2017-07-29
Rated 4 out of 5 by from ok bought these to screw thu plastic decking into scaffold tube , not the best plan , if they get the center of the tube they might drill/ screw in , if 5mm off centre they slide off the side . so I had to drill a pilot first .. possibly not a fair test , probably ok drilling to flat surface .
Date published: 2017-03-06
Rated 5 out of 5 by from Techfast screws Tried other makes but these from tool station were the best. Friendly service as well
Date published: 2017-02-16
Rated 5 out of 5 by from Frame fixing I am fixing wooden windows and door frames in a steel framed orangery and they are A1 me and the builder were very pleased .they drill fast through 6mm steel and make a strong fixing .
Date published: 2016-12-27
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