Model 420SS Stainless Steel Invisible Hinge
SOSS® Invisible Hinge model #420SS is for use in metal applications. This full size door style hinge will provide superior appearance and durability. Made of complete 316 stainless steel. 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 #420SS 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 demands more hinges.