F051-00-A
It can meet the fire requirements stated in SOLAS 1974 and amendments in 1978 and watertight test quirements 0.05MPa.

LxBxR clear size	L1xB1xR1 opening size	L2xB2xR2 cover size	tcover thickness	tocoaming thickness	qty of clips
630x630xR115	600x600xR100	785x785xR193	6	6	4
730x730xR115	700x700xR100	885x885xR193	6	6	4
830x830xR115	800x800xR100	985x985xR193	6	6	6
930x930xR115	900x900xR100	1085x1085xR193	6	6	8
1230x1230xR115	1200x1200xR100	1385x1385xR193	6	6	12

Note: Coaming height “H” is to be determined by client.
Identification example:
A60 watertight hatch cover, clear size is 630x630mm,t is 6mm, t0 is 6mm:
A60 watertight hatch cover A60 630x630x6-6 XF051-00-A