National Marker N225938 Stainless Steel Door Hinge 4 in

Product Description

The NATIONAL MARKER N225938 is a 4-inch square stainless steel door hinge designed for full mortise installation on interior and exterior doors. Built from heavy-gauge stainless steel, it delivers strong corrosion resistance in demanding environments including coastal, industrial, and high-moisture applications. The 5-knuckle design provides smooth, stable pivot action, while the non-rising pin keeps the hinge seated through repeated use. Countersunk screw holes allow fasteners to sit flush, and the removable pin simplifies installation and door removal. A decorative knob on the hinge gives it a finished appearance suited to visible door applications.

This hinge is appropriate for residential and light commercial door installations where corrosion resistance and a clean aesthetic are both required. The full mortise configuration means it recesses flush into the door edge and frame, which is standard for most interior and exterior door framing applications. It is installed by carpenters, general contractors, and maintenance trades working on entry doors, passage doors, or utility enclosures that see moisture exposure. This part corresponds to National catalog model V514.

Key Features

• Heavy-gauge stainless steel construction for maximum corrosion resistance
• 5-knuckle, full mortise design for flush, stable installation
• Non-rising pin maintains consistent hinge position under load
• Removable pin for easier door hanging and removal
• Countersunk screw holes for flush fastener seating
• Decorative knob provides a finished appearance on visible installations

Compatibility

Designed as an OEM-style replacement or direct-install hinge for standard full mortise door applications requiring a 4-inch square stainless steel hinge.

Installation Notes

Install by qualified carpenters or maintenance personnel familiar with door hardware. Power down any electronic door hardware or access control systems before servicing the door assembly. Use a sharp chisel and appropriate router or mortise template to cut accurate mortise pockets in both the door edge and the frame before setting the hinge. Follow local building codes for door hardware specifications, particularly in fire-rated corridor or egress applications.

Technical Specifications

• Size: 4 inches square
• Material: Stainless Steel
• Hinge Design: Full Mortise, 5 Knuckle
• Pin Type: Non-Rising, Removable
• Corner Style: Square
• Screw Holes: Countersunk
• Weight: 0.604 pounds
• UPC: 00038613225930

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N225938