National Mfg N140-798 Full Mortise Tight Pin Hinge 4.5in 5-pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N140-798 is a full mortise tight pin hinge designed for standard door installations requiring a secure, non-removable pin configuration. Manufactured from cold rolled steel with a zinc finish, this hinge measures 4.5 inches and features a 5-knuckle construction with a swaged leaf profile sized for mortise cutouts. The riveted, non-removable pin prevents disassembly from the hinge side, adding a layer of security to the finished door. This package contains 5 hinges, making it suitable for a complete single-door installation. Licensed contractors and finish carpenters rely on this style of hinge for commercial and residential door hardware applications.

This hinge is intended for full mortise door installations where the hinge leaf is recessed flush into both the door edge and the door frame. The 4.5-inch leaf height suits medium to heavy interior and exterior door applications. The tight pin design keeps the pin fixed in place during operation, reducing wear over time. The zinc coating provides corrosion resistance appropriate for interior use and protected exterior environments. Each unit ships as part of a 5-piece pack, matching standard door sets that require three hinges per door.

Key Features

• Full mortise design with swaged leaves for flush door and frame installation
• Non-removable, riveted tight pin for added door security
• Cold rolled steel construction with zinc finish for durability and corrosion resistance
• 5-knuckle configuration for smooth, stable pivot action
• 4.5-inch leaf height suitable for medium to heavy door applications
• Sold in a pack of 5 to cover a standard single-door installation

Compatibility

Designed as an OEM-style replacement or new-installation hinge for full mortise door applications requiring a 4.5-inch tight pin hinge with a non-removable pin.

Installation Notes

Installation is typically performed by finish carpenters, door hardware installers, or licensed contractors. Mortise the door edge and frame jamb to the correct depth before seating the hinge leaves to ensure a flush fit. Verify door weight and frequency of use before selecting hinge quantity per door. Follow all applicable local building codes for door hardware installation.