Padlockable-Surface and Universal Strike Only, Zinc, Heavy Duty Barrel Slide Bolt - 4PB94|4PB94 - Grainger
Everbilt 8 in. Zinc-Plated Heavy Duty Barrel Surface Bolt 15089 - The Home Depot
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
2 Packs Spring Loaded Barrel Bolt Latch Pin Heavy Duty Steel Sliding Door Lock | eBay