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Customer Q&A

Because You Asked: Questions we have received.
Which is better for attaching furring strips to framing for hanging shiplap siding? Ceramic screws or stainless steel? They'll have to go through 1/2 playwood + 2" polyiso rigid foam + 3/4" furring strip itself before they hit the framing. 3/4" -1" into framing should be fine. So a 4" or 4 1/2" screw...which material for holding up in weather?

Stainless Steel.
Chat 1

went to home depot for metal roof screws but they only had max widths of 4mm, same as what my roof currently uses. Need a wider diameter (not longer) screw for the roof holes in the wood that have been compromised over the years and will no longer hold a standard size screw. are they available? 

what size shank are your old screws?

hang on 

here is a pdf that shows shank size dimentions 

shank is 1", diameter is 1/4".  diameter of 3/8" would be ideal 

ok, more difficult because #14 or 1/4" shank is pretty standard. 

you would need to replace it with a #17. i have to see if a 1 inch is available.

since you are replacing a screw, you do not need to replace with another self drilling screw   

correct, but i do need the type with the rubber washer

maybe people just fill the oversized holes with some type of wood hardener that's waterproof? i used silicone but it doesn't hold the screws 

i have never heard of anyone doing that in 35 years. they always jump to the next size so the threads can tap again
#17 would be your best bet

i do know that some people who have to replace #14 screws, will jump to a 5/16 lag type screw and put a bonded neo washer on it to seal


no problem. good luck!
Chat 2
Hi, we are going to use dacromat coated screw in one of our project, should we consider any consideration during fastening the screw in order to prevent coat damage?


Chat 3
do you have 3" TEK screws

yes we do   
what shank? what is the diameter? 3/8 would be best    

thickest is normally #14, which is a 1/4" thick shank. It has a 3/8 hex head.

great, thanks

let me give you a link to the page -      
thanks, thats awesome.  thank you for your help

you're very welcome
Chat 4
what size anchors fits in a hole drilled by a bit size 3/16

what type of anchor are you looking to buy?

zinc hammer drive

ok, looks like you would use a 3/16 hammerdrive.  we have those in 3/16x7/8 -
thank you

you're welcome
Chat 5
hi, can you tell me the difference between tek 3 and tek 5 screws?          
yes, a tek 5 can go through up to 1/2" steel         
here is data on tek 3:
so the tek 3 just have a shorter drill head?
tek 3 can't go thru the real thick metals
what thickness do you want to drill thorugh?
1/4 to 3/8"         
then you need a tek 5   
Thanks for your help.
Chat 6

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