HeadLOK Structural Wood Screws – 6 inch flat head wood screws – Black (50 Pack)

A:  Hi Anika, Thank you for reaching out. I'm sorry the Spider drive bit was missing in your box of Headloks. Can you please send your address to orders@fastenmaster.com (or call us at 1-800-518-3569) & I can further assist you. Some Home Depot stores do sell the Spider drive bit separately & the part number is FMSPIDER3-2PK. Thanks!!

A:  I have had this occur. I predrill the board(s) you are going through to prevent this. Looking at the design on the fastener you can see the first portion of it goes straight through and it bits into the final material so predrilling is acceptable and has prevented splitting for me.

A:  I used them on 2x10's but i did not pre drill the holes. It did not split out the wood. I would recommend it at least an inch from the side of the wood just in case. Mine was in the main part of the post.

A:  I would suggest you back off about 2 inches if not pre drilling and then I had no problem

A:  Yes you should always pre drill using a bit 30 % the size of the fastener

A:  I screwe 2 of them into the ends of 2x8s and there was no sign of splitting. Really pulled the woo together great.

A:  If you are angle drilling these screws I would drill the holes to counter sink them. I used these screws to hold corbels on my front porch. They worked perfect. I only used one on each side of the corbel. I counter sunk them so I did not see the screw. Because of the length I would go deeper into the wood so you would not tear out the post. Hope this helps.

A:  If you use 8 inch screws these would work.

A:  Thats what i did...works great with no wobble.

A:  Absolutely.

A:  Yes, I use it in pressure treated lumber all the time.

A:  Yes,and you do not need to pre-drill

A:  They would work great. I used them to put landscape timbers together. My landscape timbers were 3" thick and the 4x4's are 3 1/2" thick, but the screws would still go 2 1/2" into the wood you are attaching them to.

A:  Yes. These are technically deck screws. It will however go all the way through the 4x4 with 2.5 inches sticking out the other side. Make sure you do the math and find your ideal length and this fastener will work beautifully.