I’VE INSTALLED 1000's OF SCREWS WHILE BUILDING THIS PLACE…
Therefore an adjustable countersink really is valuable to me. I’ve been using these Black & Decker countersinks for over 20 years now and I really like them because they are adjustable for not only thread pilot hole depth, but also for the clearance hole depth and countersink/bore depth. For maximum clamping force, I feel it’s important that the clearance hole goes through the entire thickness of the piece being attached.
Here is a picture of the #8 countersink and the screw it was being used for. In this case, I set the thread pilot depth shorter than the screw length since it was just going in soft pine. The clearance hole depth was set to go through the plywood being fastened.

Here’s a #12 countersink and it looks like I was running 3” screws last time I used it.

I found out recently that another manufacturer sold the same thing.

Here are some part numbers for you, but it appears the B&D brand have been discontinued. The big box stores don’t seem to carry anything comparable so I turned to feebay and found some. Now I’m probably set for another 20 years
.
. #8 screw - B&D# U-1593 or Great Neck WD8
#10 screw - B&D# U-1594
#12 screw - B&D# U-1595
It’s probably safe to assume the other Great Neck numbers are WD10 and WD12.
Here is one of the deck screws installed.

Therefore an adjustable countersink really is valuable to me. I’ve been using these Black & Decker countersinks for over 20 years now and I really like them because they are adjustable for not only thread pilot hole depth, but also for the clearance hole depth and countersink/bore depth. For maximum clamping force, I feel it’s important that the clearance hole goes through the entire thickness of the piece being attached.
Here is a picture of the #8 countersink and the screw it was being used for. In this case, I set the thread pilot depth shorter than the screw length since it was just going in soft pine. The clearance hole depth was set to go through the plywood being fastened.

Here’s a #12 countersink and it looks like I was running 3” screws last time I used it.

I found out recently that another manufacturer sold the same thing.

Here are some part numbers for you, but it appears the B&D brand have been discontinued. The big box stores don’t seem to carry anything comparable so I turned to feebay and found some. Now I’m probably set for another 20 years
. #8 screw - B&D# U-1593 or Great Neck WD8
#10 screw - B&D# U-1594
#12 screw - B&D# U-1595
It’s probably safe to assume the other Great Neck numbers are WD10 and WD12.
Here is one of the deck screws installed.

Last edited:











































