#9 x 1-1/2" screws used to fasten multi-wall polycarbonate sheets to wood base. Includes neoprene sealing washers. Sold 100/per bag.
LTL Freight Type
Standard Drop Shipment Code
Available for Drop Shipment
Item Tracking Code
They bite into wood easily and secure polycarbonate strongly without cracking it
Barely long enough
Using 16mm triple-wall polycarbonate sheets with the 3/8" rubber spacers as recommended, these screws only go about 1/2" into the wood. I don't feel comfortable with that little so I think I will go out and buy some longer screws on my own.
Good Source for this tape with Competitive pricing on 3M cloth tape.
The screws you receive are much better than the ones pictured. Worked better than expected
My first time with polycarbonate on a greenhouse. That said, these screws are great. They pull the panels down on the wood framing very well and if you're careful they don't crush the panels - be careful. Use slow speed on the drill or use a hand tool to finish the last few turns.
The quality of the screws and washers was quite good. We've had plenty of snow and rain since I used these to install my twinwall, and I have yet to see any leaks.
Bad washered screws
The screws with the large washers are of very poor quality.I did not find the screws in the packing crate,replacements were sent to me exactly as pictured for what I ordered. I had removed the washers to fasten cap strips over the seams,some of the screws I found out later had broken and rusted. Later I did find the bag of screws originally sent, these were not what I ordered per the picture but are far superior to the ones I had ordered. (I paid for the replacements later after I found the original bag)