National Mfg N178-806 Black Keyed Knob Latch Storm Door

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N178-806 is a black universal keyed knob latch designed for screen and storm door applications. This hardware fits wood or metal door frames and accommodates three hole spacing configurations: 1-1/2 inches, 1-3/4 inches, or 3 inches. That flexibility makes it a practical choice when replacing an existing latch without knowing the exact original bore pattern. The keyed knob function provides both latching and locking in a single unit. This package contains 3 units and ships in carded retail packaging, making it suitable for stocking or resale as well as direct installation use.

This latch is intended for residential screen doors and storm doors constructed from either wood or metal. The universal hole spacing compatibility means it can serve as a replacement latch across a wide range of door brands and styles without requiring custom boring or modification. Installers working on older screen door frames with non-standard spacing will find the three-position compatibility especially useful. The black finish blends with common door hardware finishes used in residential entry applications.

Key Features

• Fits wood or metal screen and storm door frames
• Accommodates 1-1/2 inch, 1-3/4 inch, or 3 inch hole spacing
• Keyed knob design provides latching and locking in one unit
• Black finish for compatibility with standard residential door hardware
• Package includes 3 units, carded for retail or stocking use

Compatibility

Designed as a universal replacement keyed knob latch for wood or metal screen and storm doors with hole spacing of 1-1/2 inches, 1-3/4 inches, or 3 inches.

Installation Notes

Installation is typically performed by a door hardware installer or general contractor. Before beginning, ensure the door is fully closed and any existing latch hardware has been removed. Verify the existing bore hole spacing matches one of the three supported configurations before installation. Follow all applicable local building codes for residential door hardware.