ANCHOR HATCHES ANODIZED ALUMINUM SQUARE 24" X 24", Stainless steel trim ring with attached gasket.

Clear opening: 22" X 22"
Cover: 23.75" X 23.75"
Deck cut out: 24.25" X 24.25"
Outside flange diameter: 27" X 27"

This hatch requires a wrench to open, item # HM-H-WRENCH-QR (sold separately).

Recommended fastener is #12 316 stainless steel tapping screws (.75" to 1.00" long depending on deck thickness)
ISO 12216 standard, 2,400lbs total load with pressure applied evenly across the cover