These bolts are countersunk identical to the OEM bolts so they will seat completely flush.
BEWARE: There are many bolts for sale out there. Black oxide (black bolts), chrome, and zinc/zinc plated are NOT rust and corrosion proof. Painting black oxide, chrome, and zinc does NOT make them rust and corrosion proof. Keep this in mind when shopping for replacement bolts. Black oxide, chrome, and zinc plate, once they begin to rust and it gets into the threading of the bolt holes, it eats away at the tub. If you are going to purchase those slightly less expensive bolts, might want to hold onto the receipt for about 2-3 months and watch for signs of corrosion.
We have been using the Hex Stainless Steel bolts we sell for a long time and never had a single issue with them. If they should ever strip please contact us.