Door Lock,Thick Slide Barrel Door Bolt Latch Heavy Duty Gate Lock Security Guard Hardware for Bedrooms/Bathrooms/Cupboards/Pet Gate and Storage Units(3.5 * 1.1 inches) - Amazon.com
SLIDE BOLT, HEAVY DUTY - Modern Hardware | Modern Hardware
8 Inch Padlocking Slide Bolt, Don-Jo 1582-626 - Doorware.com