Model 418 Alloy Steel Invisible Hinge
Concealed hinge for 1-3/4" thick wood or metal doors with 90/180-minute fire rating
SOSS® Invisible Hinge model #418 is for use in wood or metal applications that are 1-3/4" thick. The model #418 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 #418 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. They can also be used on wood core doors and frames rated up to 20 minutes. Additionally, they can be used on wood/plastic composite doors and frames constructed with Georgia Pacific FS 1 or FS 2 banding for a rating up to and including 90 minutes.
Specifications
- Min material thickness
- 1-3/4"
- Max material thickness
- 1-3/4"
- Fire rating
- 90/180 minutes
- Power transfer
- No
- Closer
- No
- Material
- alloy steel
- Opening angle (°)
- 180
- Hinge type
- single action
- Screws included
- wood and machine
- Source
- SOSS Door Hardware’s published documentation
- Last verified
- 2026-06-23
- Stored
- specifications only
- Not stored
- prices, product images
- Found an error?
- Report a correction
Sources
- https://www.soss.com/product/model-418-alloy-steel-invisible-hinge/ — verified 2026-06-23
Product id: soss-418-alloy-steel-invisible-hinge · last updated 2026-06-23 · JSON