National Mfg N178-400 Aluminum Push Button Door Latch

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N178-400 is an aluminum push button latch designed for wood or metal screen and storm doors. It operates through a one-piece shaft that delivers firm, consistent push button action with each use. The inside latch features a double lock deadbolt for added security, and the unit includes a key-operated locking mechanism with two keys provided. An anti-lockout design prevents accidental lockouts. This latch fits doors ranging from 1.25 inches to 2 inches thick and requires a 1.75-inch hole spacing. Installation uses 8-32 x 2.375-inch pan machine screws, which are not included with the unit.

This latch is suited for residential screen doors and storm doors constructed of either wood or metal. It is a practical replacement or new-installation hardware component for entry-level exterior screen door applications. The package quantity is 3 units, making it appropriate for contractors or service pros handling multiple door installations in a single job or building.

Key Features

• Aluminum construction for corrosion resistance on exterior screen and storm doors
• One-piece shaft delivers firm, reliable push button action
• Anti-lockout design prevents accidental lockouts during use
• Double lock deadbolt on inside latch provides added security
• Key-operated locking unit with two keys included
• Fits doors 1.25 inches to 2 inches thick with 1.75-inch hole spacing

Compatibility

Designed for wood or metal screen and storm doors with 1.75-inch hole spacing and door thickness between 1.25 inches and 2 inches. Requires 8-32 x 2.375-inch pan machine screws for installation (not included).

Installation Notes

Installation is typically performed by a general contractor, handyman, or experienced DIYer. Before installing, ensure the door is stable and held open or removed from its hinges to allow safe drilling and hardware placement. Use the correct 8-32 x 2.375-inch pan machine screws (not provided) and verify hole spacing matches the 1.75-inch requirement before cutting or drilling. Do not overtighten fasteners, as this may affect latch travel and push button operation.