Due the wide variety of
hatch sizes & shapes, most aftermarket hatch screens are not the fitted insert type that OEM’s offered - but one-size-fits-all tent-type.
Maggie made our hatch screens, but sewing Velcro (the “hairy” Loop part) ribbon around the perimeter of a hemmed
screen, and gluing the hook ribbon around the inside perimeter of the hatch. Worked very well.
A, larger,
companionway screen was made by hemming weights into the upper and lower edge of the screen. The top edge was additionally secured with a bungee cord.
See also Practical Sailor magazine article:
Build Your Own
Companionway Hatch Screens - by Paul Ring
http://www.practical-sailor.com/news...tchscreens.pdf
Aftermarket "Tent" type screen