Flush Fitting Hatch Locking Devices Flush Fitting Hatch Lock Suitable For Minimum Hatch Thickness Of 15mm. Art 202 Is Supplied With A Threaded Brass Backing Plate For Installation, Fixing Bolts Not Supplied. Rotating The Handle Clockwise Operates The Locking Lever Until The Desired Tightness Is Obtained. To Open The Hatch Si..