SOSS 220AS Invisible Hinge, 5-1/2" Alloy Steel with Fire Rating for 2" Minimum Door Thickness

SOSS 220AS Invisible Hinge, 5-1/2" Alloy Steel with Fire Rating for 2" Minimum Door Thickness

The SOSS 220AS Invisible Hinge is a full-size, 5-1/2" concealed hinge constructed of alloy steel and designed for wood or metal door applications with a 2" minimum material thickness. This single-action hinge opens a full 180° and is Underwriters Laboratories labeled for use on hollow metal, sheet metal, tin clad, and steel composite swinging fire doors and frames rated up to and including 3 hours, wood core doors and frames rated up to 20 minutes, and wood/plastic composite doors constructed with Georgia Pacific FS 1 or FS 2 banding rated up to and including 90 minutes. Wood and machine screws are included for installation.

Key Features

• Door Thickness Compatibility: Designed for wood or metal doors with a 2" minimum material thickness for full-size entry applications.
• Full Sized Hinge: Measures 5-1/2" for use on full-size entry doors in metal or wood construction.
• Heavy-Duty Construction: Made of alloy steel for superior appearance and durability in demanding commercial applications.
• Full 180° Operation: Single action hinge design allows the door to open a full 180 degrees for versatile installation.
• Fire Door Compatibility: UL labeled for use on hollow metal, sheet metal, tin clad, and steel composite fire doors and frames rated up to and including 3 hours, wood core doors and frames rated up to 20 minutes, and wood/plastic composite doors with Georgia Pacific FS 1 or FS 2 banding rated up to and including 90 minutes.
• Included Hardware: Wood and machine screws are included for straightforward installation without sourcing additional fasteners.
• Fire-Rated Hinge Placement Guidance: Use at least one fire-rated hinge for every 20" of door height or portion thereof, or one hinge for every 60 lbs. of door weight or fraction thereof, whichever calculation demands more hinges.
• Concealed Design: Invisible hinge construction provides a flush fit and compact size for applications where smooth operation and clean appearance are required.

Certifications & Compliance

• Underwriters Laboratories (UL) Labeled
• Fire Rating up to 3 Hours on Hollow Metal, Sheet Metal, Tin Clad, and Steel Composite Fire Doors and Frames
• Fire Rating up to 20 Minutes on Wood Core Doors and Frames
• Fire Rating up to 90 Minutes on Wood/Plastic Composite Doors with Georgia Pacific FS 1 or FS 2 Banding

Technical Specifications

• Subcategory: Hinges and Pivots
• Product Group: Door Hinges and Pivots
• Product Subgroup: Concealed Hinges
• Commercial/Residential: Commercial
• Duty Level: Heavy Duty
• Electronic: No
• Corner Type: Radius
• Series: 220 Series
• Collection: 220 Series
• Product Size: 5-1/2"
• Product Category: Door Hinges and Pivots
• Department: Door Hardware
• Application: Full Sized Entry, Metal, Wood
• Min. Material Thickness: 2″
• Fire Rating: 90 / 180 Minutes
• Power Transfer: No
• Closer: No
• Counter Bored Screw Holes: No
• Screws Included: Wood and Machine
• Packaging: 1 / Box = 1 Each
• Packages Per Container: 1 Each
• Price Per: Each

Typical Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Retail Establishments
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• Government and Municipal Buildings

Why SOSS 220 Series?

SOSS 220 Series hinges deliver professional-grade reliability through alloy steel construction and UL-labeled fire ratings for demanding commercial door applications. The full 180° single-action operation combined with a concealed, flush-fit design makes this hinge a dependable choice where appearance, durability, and smooth function are all essential.