1/4-20 x 2 1/4 Flat Head Floorboard Thread Cutting Screws, Type F, (Star - Six Lobe Drive), Black Phosphate Finish, Countersunk, T-30 Drive (Carton: 100pcs) Alloy Steel

Worked excellent for my ranger deck, .2280 pilot hole, ran in nice and easy, seem to cut nice threads. Bought 1200, used nowhere near that, might use them on the trailer next. Very happy

The media could not be loaded.  I drilled a pilot hole with a 7/32 bit and they went in super easy. I had to install a deck on a utility trailer and was worried about how long and difficult it would be and these went in like butter. It made the job enjoyable.

I used these to reflect my car trailer. As I was using them I broke one that's it. These are very impressive.

Worked as intended! No stripping of heads and the coating looked good. Threads were very clean and solid.

New deck for my trailer screws worked well

You will not be disappointed ,used 80 never broke one .

Need to replace about 100 bolts in a toy hauler trailer. It has Logistic L-Track aka airline track for tie down locations. the OE installed undercut flat head screws are having heads breaking/pooping off!! Already had 6 broken bolts like this! I had to use a drill and broken screw extractor to get the broken self tappers out. A real chore!! They are way to tight! But the new screws look great, these are not undercut, but "self drilling" and the threaded hole is already there in the floor, so these are installing easily. TORX is the way to go on fasteners! Better than hex head and FAR better than Phillips (all my L-Track is installed with Phillips).. Happy to replace all of them over time.

Worked perfectly, just need to pre drill.