SOSS 420IC Invisible Closer Hinge for 2" Metal Doors

SOSS 420IC Invisible Closer Hinge for 2" Metal Doors

The SOSS 420IC Invisible Closer Hinge is engineered for metal doors that are 2" thick, delivering a door closer that remains completely concealed from either side when the door is closed. Constructed from alloy steel materials, this heavy-duty spring hinge from the 420 Series opens a full 180° as a single-action hinge and features a closure rate that is fully adjustable with an allen wrench after installation — no removal required. It can be installed inside the door itself or inside the door jamb, and is Underwriters Laboratories labeled for use on hollow metal, sheet metal, tin clad, and steel composite swinging type fire doors and frames with a 3 hour rating, as well as wood core doors and frames rated up to 20 minutes.

Key Features

• Door Thickness Compatibility: Designed specifically for 2" thick metal doors for a precise, secure fit.
• Product Size: 4-1/2" hinge size suited for full-sized entry doors in metal and wood.
• Heavy-Duty Construction: Made of alloy steel, zinc and steel materials for long-term commercial durability.
• Fully Adjustable Closure Rate: Closure speed can be adjusted with an allen wrench after installation without removing the closer.
• Invisible Design: Totally concealed from either side of the door when closed, preserving clean sightlines.
• 180° Single-Action Operation: Opens a full 180° as a single action hinge for versatile door swing.
• Flexible Installation: Can be installed inside the door itself or inside the door jamb; machine screws are included.
• Fire Rated Performance: UL labeled for use on hollow metal, sheet metal, tin clad, and steel composite fire doors and frames rated up to 3 hours, and wood core doors and frames rated up to 20 minutes.

Certifications & Compliance

• Underwriters Laboratories (UL) Labeled
• 3 Hour Fire Rating on Hollow Metal, Sheet Metal, Tin Clad, and Steel Composite Fire Doors and Frames
• 20 Minute Rating on Wood Core Doors and Frames

Technical Specifications

• Product Group: Door Hinges and Pivots
• Series: 420 Series
• Subcategory: Spring Hinges
• Product Subgroup: Concealed Hinges
• Commercial/Residential: Commercial
• Duty Level: Heavy Duty
• Electronic: No
• Corner Type: Square
• Product Function: Spring Hinges
• Product Size: 4-1/2"
• Product Category: Door Hinges and Pivots
• Product Substrate: Zinc and Steel
• Department: Door Hardware
• Application: Full Sized Entry, Metal, Wood
• Min. Material Thickness: 2″
• Fire Rating: 3 Hour
• Power Transfer: No
• Closer: Yes
• Counter Bored Screw Holes: No
• Screws Included: 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 420IC?

SOSS 420IC hinges combine alloy steel and zinc and steel construction with UL-labeled fire door performance rated up to 3 hours on metal doors and 20 minutes on wood core doors, delivering heavy-duty reliability for demanding commercial applications. The fully concealed, field-adjustable design ensures dependable, single-action 180° operation while maintaining a clean, invisible appearance on both sides of the door.