Hager BB1278N 4-1/2X4-1/2 US26D LH Mortise Hinge NRP BB 4.5" x 4.5" 26D

Hager BB1278N 4-1/2X4-1/2 US26D LH Mortise Hinge NRP offers a robust solution for high-frequency door applications. This full mortise ball bearing hinge features a standard weight design and measures 4-1/2 inches by 4-1/2 inches, making it perfect for both hollow metal and wood composite doors paired with hollow metal frames. Crafted from durable steel, it includes five knuckles and one leaf tapped, ensuring reliable performance in commercial environments. The satin chromium plated finish not only adds a touch of elegance but also enhances resistance to corrosion and wear. With a fire rating of up to three hours, this hinge is an excellent choice for safety-conscious installations. The non-removable pin type provides added security, while the full mortise design allows for a seamless fit that maintains the aesthetic of the door and frame. Hager is renowned for its commitment to quality, and this hinge meets or exceeds ANSI/BHMA A156.1 standards. Available for easy shipping via UPS, the Hager BB1278N is suitable for various applications, ensuring your doors function smoothly and securely. With a lifetime limited warranty, you can trust in the longevity and durability of this essential hardware component.

MORT HINGE NRP BB 4.5X4.5 26D

Full Mortise Ball Bearing Hinge, Standard Weight, 4-1/2" by 4-1/2", Left-Handed, Steel, 5 Knuckle, One Leaf Tapped, Satin Chromium Plated Finish

Ball bearing standard weight steel base hinge one leaf tapped for use on hollow metal or wood composite doors with hollow metal frames requiring high frequency service.

There are three dimensions to know in order to determine the minimum width of the hinge: door thickness, backset, and clearance required.

Today, the Hager name is synonymous with architectural hinges. In fact, they are the industry’s premiere designer and manufacturer of architectural hinges, with a product line that offers one of the widest varieties of sizes, shapes, and finishes--all of which meet or exceed ANSI standards. 

• Hinges are manufactured in accordance with ANSI/BHMA A156.1. Self-closing hinges and pivots are in accordance with ANSI/BHMA A156.17 using three hinges per opening on a 3’0” x 7’0” x 1-3/4” (914 mm x 2134 mm x 44 mm) door. 
• Round corners are available in 1/4” (6 mm) (standard) or 5/8” (16 mm) radius.
• Full Mortise Both leaves are mortised, one leaf in the door and one leaf in the frame (wood door or hollow metal door with wood frame or hollow metal frame). Example: BB1279, 4-1/2” x 4-1/2” (114 mm x 114 mm), US26D
• Half Mortise One leaf is mortised in the door and the other is surface applied to the frame (hollow metal door with channel iron frame). Example: BB1109, 4-1/2” (114 mm), US26D
• Full Surface Both leaves are applied to the surface, one to the door and the other to the frame (metal core door or hollow metal door with channel iron frame). Example: BB2171, 5” (127 mm), USP
• Half Surface One leaf is mortised in the frame and the other is surface applied to the face of the door (wood door with wood frame or metal core door with hollow metal frame) Example: BB1163, 5” (152 mm), US26D

Resources

• Hager Commercial Hinges Cut Sheet