SOSS 416SS Invisible Hinge, 4-5/8" Satin Stainless Steel with 3-Hour Fire Rating

SOSS 416SS Invisible Hinge, 4-5/8" Satin Stainless Steel with 3-Hour Fire Rating

The SOSS 416SS Invisible Hinge is a 4-5/8" concealed hinge engineered for wood or metal doors with a 1-3/8" minimum material thickness. Constructed of complete 316 stainless steel in a Satin Stainless Steel (US32D) finish, this full size door style hinge delivers a flush fit, compact concealed profile, smooth single-action operation, and full 180° swing. Underwriters Laboratories labeled, the model 416SS is rated for use on hollow metal, sheet metal, tin clad, and steel composite fire doors and frames up to and including 3 hours, wood core doors and frames up to 20 minutes, and wood/plastic composite doors and frames with Georgia Pacific FS 1 or FS 2 banding up to and including 90 minutes.

Key Features

• Door Thickness Compatibility: Designed for wood or metal door applications with a 1-3/8" minimum material thickness.
• Full Size Concealed Design: 4-5/8" full size door style hinge provides a flush, invisible appearance while maintaining compact size and durability.
• 180° Single Action Operation: Opens a full 180° for smooth, reliable single-action swing performance.
• Corrosion-Resistant Construction: Made of complete 316 stainless steel, ideal for applications requiring flush fit, smooth operation, and corrosion resistance.
• Fire Rated Performance: 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 up to 20 minutes; and wood/plastic composite doors and frames with Georgia Pacific FS 1 or FS 2 banding up to and including 90 minutes.
• Installation Hardware Included: Wood and machine screws are included for straightforward installation.
• 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 demands more hinges.

Certifications & Compliance

• Underwriters Laboratories (UL) Labeled
• Fire Rated up to 3 Hours (Hollow Metal, Sheet Metal, Tin Clad, Steel Composite Doors/Frames)
• Fire Rated up to 20 Minutes (Wood Core Doors/Frames)
• Fire Rated up to 90 Minutes (Wood/Plastic Composite Doors/Frames 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: 416 Series
• Product Finish: US32D - Satin Stainless Steel
• Product Size: 4-5/8"
• Product Category: Door Hinges and Pivots
• Product Substrate: Alloy Steel
• Department: Door Hardware
• Application: Exterior, 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?

SOSS 416 Series invisible hinges deliver professional-grade reliability with complete 316 stainless steel construction rated for demanding fire door applications, from 3-hour hollow metal doors to 90-minute wood/plastic composite assemblies. Engineered for commercial applications where flush appearance, smooth 180° operation, and corrosion resistance are essential, the 416SS is a trusted choice for exterior and full size entry doors.