SOSS 416 Series Invisible Hinge, 4-5/8" Alloy Steel with Fire Rating

SOSS 416 Series Invisible Hinge, 4-5/8" Alloy Steel with Fire Rating

The SOSS 416 Series Invisible Hinge is a full-size, 4-5/8" alloy steel door hinge engineered for wood or metal applications requiring a minimum material thickness of 1-3/8" (rated for doors up to 1-3/4" thick). Designed for flush fit, compact concealment, and smooth single-action operation, this hinge opens a full 180° and is Underwriters Laboratories labeled for fire-rated applications up to 90/180 minutes depending on door construction. Wood and machine screws are included for straightforward installation on full-sized entry doors in metal or wood.

Key Features

• Product Size: 4-5/8" hinge body sized for full-size entry doors.
• Minimum Material Thickness: Designed for doors and frames with a minimum thickness of 1-3/8", suitable for doors up to 1-3/4" thick.
• Fire Rating: 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 (180 minutes); wood core doors and frames 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.
• Heavy-Duty Construction: Made of alloy steel for superior appearance and long-term durability in demanding commercial environments.
• Full 180° Single-Action Operation: Provides smooth, reliable swing with a flush, invisible profile when the door is closed.
• Corner Style: Featuring 5/8" radius rounded corners for a refined, finished look.
• Screws Included: Both wood and machine screws are provided for versatile installation on metal or wood doors.
• Fire Door Hinge Quantity Guidance: Use at least one fire-rated hinge for every 20" of door height (or portion thereof) or one hinge for every 60 lbs. (or fraction thereof), whichever calculation requires more hinges.

Certifications & Compliance

• Underwriters Laboratories (UL) Labeled
• Fire Rated up to 3 Hours (180 Minutes) on Hollow Metal, Sheet Metal, Tin Clad, and Steel Composite Doors
• Fire Rated up to 20 Minutes on Wood Core Doors and Frames
• Fire Rated up to 90 Minutes on Wood/Plastic Composite Doors with Georgia Pacific FS 1 or FS 2 Banding

Technical Specifications

• Corner Style: 5/8" Radius Corners
• Subcategory: Hinges and Pivots
• Commercial/Residential: Commercial
• Product Group: Door Hinges and Pivots
• Product Type: Hinges and Pivots
• Duty Level: Heavy Duty
• Electronic: No
• Corner Type: Rounded
• Series: 416 Series
• Product Size: 4-5/8"
• Product Category: Door Hinges and Pivots
• Department: Door Hardware
• Application: Full Sized Entry, Metal, Wood
• Min. Material Thickness: 1-3/8″
• 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 416?

The SOSS 416 Series delivers professional-grade reliability through alloy steel construction and UL-labeled fire ratings up to 180 minutes, making it a trusted choice for demanding commercial door applications. Its invisible, flush-fit design combines superior appearance with smooth 180° single-action operation, ensuring dependable performance where compact size and durability are essential.