Concealed Hinges - 1-1/8 Inch x 4-39/64 Inch - For Min Thick Door 1-3/4 Inch - Alloy Steel - Multiple Finishes Available - Sold Individually


SKU: 418US4

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SOSS® Invisible Hinge model #418 is for use in wood or metal applications. 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.

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 available for an additional charge.

Finishes Available: Satin Brass, Satin Chrome, Satin Nickel

Additional Information

Application Full Sized Entry, Metal, Wood
Min. Material Thickness 1-3/4"
Fire Rating 90 / 180 MInutes
Power Transfer No
Spring Closer No
Counter Bored Screw Holes No
Screws Included Wood


A 1-1/8" (28.58mm)
B 55/64" (21.83mm)
C 4-39/64" (117.08mm)
D 22/64" (9.13mm)
E 1/4" (6.35mm)
F 2-7/16" (61.91mm)
G 1/16" (1.59mm)
H 1-41/64" (41.67mm)
I 13/32" (10.32mm)
Min. Matl. Thickness 1-3/4" (44.45mm)
Wood Screw Sizes #10x2-1/2"
Soft Wood Pilot Hole No. 43
Hard Wood Pilot Hole No. 31
Machine Screw Sizes #10-24x3/4"
Hinge Weight 2.15 lb.