SOSS 420 Series 4-1/2" Invisible Hinge (1-3/4" Minimum Door Thickness)

SOSS® Invisible Hinge model #420 is for use in metal applications that are 2″ thick. The model #420 is made of alloy steel. SOSS® Invisible Hinges open a full 180° and are a single action hinge.

The Underwriters Laboratories labeled the model #420 SOSS® Invisible Hinge can be used on hollow metal, sheet metal, tin clad, and steel composite swinging type fire doors and frames rated up to and including 3 hours.

SOSS® Invisible Hinge model #420 is for use in metal applications that are 2″ thick. The model #420 is made of alloy steel. This full size door style hinge will provide superior appearance and durability. Our hinges are found in many applications where flush fit, compact size and smooth operation are necessary features. SOSS® Invisible Hinges open a full 180° and are a single action hinge.

The Underwriters Laboratories labeled the model #420 SOSS® Invisible Hinge can be used on hollow metal, sheet metal, tin clad, and steel composite swinging type fire doors and frames rated up to and including 3 hours. Additionally, they can be used on wood core doors and frames rated up to 20 minutes.

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 demand more hinges.

Machine screws are included.

Additional Information

Resources: 

• SOSS420 Model
• SOSS420 90 Degree Open
• SOSS420 Case Jamb Detail
• SOSS420 Clearance Detail
• SOSS420 Hinge Location