6" Black Bayonet Type Inspection Port

Bayonet action. 
No threads to seize.
Just twist the lid 1/4 of a turn to lock on or off.
Seal bonded securely to mounting rim.
Heavy duty construction to take knocks and bumps.  Lid is slightly domed for high impact strength.
Yellow "Compass Rose" in centre.
Ideal for kayaks.
Overall diameter 205mm (8").
Opening dia. 154mm (6").
Cut a 174mm (6.3/16") dia. mounting hole.
6 countersunk mounting holes (4mm dia.) centres on 197mm (7.3/8") dia.