14973266608 Timber Screw Construction Fastener, 5/16" x 12", 30

Predrill is a must...if you run one in and back it out, (Will be extremely hot!!) get a fresh one and let the other cool...you can use it again.

Use these at 2023 Burning Man, easy the screw in with a impact tool and just the right length to keep it all in place!

Not much to say about these except they definitely helped tie some timbers together for a project I was working on. Someone in the reviews said they had to pre-drill the holes. They are correct I had to as well. Not a deal breaker they just would not drive all the way in, but they also did not break when I really torqued them. I just went and bought a bit and and it all went smooth after that. Now maybe in a soft wood they may seat themselves without pre-drilling? One other thing I really liked the hex head. It held with no rounding of the head!!Otherwise I would buy them again.

Was working on gutters at my sons house, needed a longer screw and couldn't find at HomeDepot, Lowes nor local hardware store. Found this on Amazon and it saved the day. Well made, strong and coated well. If you need a long screw for special application this is it.

these screws were the perfect size for attaching railroad ties to utility poles for retainer wall

Perfect solution to anchor the pressuretreated posts under our storage shed

I attempted to use these on 6x8" timbers going through the 8" length. They could not make it through. They would bog down and eventually round the head. Make sure you have a 5/16" driver as the package does not contain a bit. I pre-drilled a 1/8" hole with a 12" bit. This allowed the fastener to bite and sink all the way in. Once in place they work fine.

This timber fastener (pre drilled) drove straight and true with no detectable wobble and was used on my (full sized ) redwood stairs. Ceramic coating never chipped or cracked even on the heads. Great fasteners!