SOSS 416SS Invisible Hinge, 4-...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$307.10
$285.50
SOSS 416SS Invisible Hinge, 4-5/8" Satin Stainless Steel with 3-Hour Fire Rating

SOSS 416SS Invisible Hinge, 4-5/8" Satin Stainless Steel with 3-Hour Fire Rating

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Model: 416SSUS32D
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$307.10
$285.50
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SOSS 416SS Invisible Hinge, 4-5/8" Satin Stainless Steel with 3-Hour Fire Rating

The SOSS 416SS Invisible Hinge is a 4-5/8" concealed hinge engineered for wood or metal doors with a 1-3/8" minimum material thickness. Constructed of complete 316 stainless steel in a Satin Stainless Steel (US32D) finish, this full size door style hinge delivers a flush fit, compact concealed profile, smooth single-action operation, and full 180° swing. Underwriters Laboratories labeled, the model 416SS is rated for use on hollow metal, sheet metal, tin clad, and steel composite fire doors and frames up to and including 3 hours, wood core doors and frames up to 20 minutes, and wood/plastic composite doors and frames with Georgia Pacific FS 1 or FS 2 banding up to and including 90 minutes.

Key Features

  • Door Thickness Compatibility: Designed for wood or metal door applications with a 1-3/8" minimum material thickness.
  • Full Size Concealed Design: 4-5/8" full size door style hinge provides a flush, invisible appearance while maintaining compact size and durability.
  • 180° Single Action Operation: Opens a full 180° for smooth, reliable single-action swing performance.
  • Corrosion-Resistant Construction: Made of complete 316 stainless steel, ideal for applications requiring flush fit, smooth operation, and corrosion resistance.
  • Fire Rated Performance: UL labeled for use on hollow metal, sheet metal, tin clad, and steel composite fire doors and frames rated up to and including 3 hours; wood core doors and frames up to 20 minutes; and wood/plastic composite doors and frames with Georgia Pacific FS 1 or FS 2 banding up to and including 90 minutes.
  • Installation Hardware Included: Wood and machine screws are included for straightforward installation.
  • Hinge Quantity Guidance: 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.

Certifications & Compliance

  • Underwriters Laboratories (UL) Labeled
  • Fire Rated up to 3 Hours (Hollow Metal, Sheet Metal, Tin Clad, Steel Composite Doors/Frames)
  • Fire Rated up to 20 Minutes (Wood Core Doors/Frames)
  • Fire Rated up to 90 Minutes (Wood/Plastic Composite Doors/Frames with Georgia Pacific FS 1 or FS 2 Banding)

Technical Specifications

  • Subcategory: Hinges and Pivots
  • Product Group: Door Hinges and Pivots
  • Product Subgroup: Concealed Hinges
  • Commercial/Residential: Commercial
  • Duty Level: Heavy Duty
  • Electronic: No
  • Corner Type: Radius
  • Series: 416 Series
  • Product Finish: US32D - Satin Stainless Steel
  • Product Size: 4-5/8"
  • Product Category: Door Hinges and Pivots
  • Product Substrate: Alloy Steel
  • Department: Door Hardware
  • Application: Exterior, Full Sized Entry, Metal, Wood
  • Min. Material Thickness: 1-3/8″
  • Fire Rating: 90 / 180 Minutes
  • Power Transfer: No
  • Closer: No
  • Counter Bored Screw Holes: No
  • Screws Included: Wood and 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 416?

SOSS 416 Series invisible hinges deliver professional-grade reliability with complete 316 stainless steel construction rated for demanding fire door applications, from 3-hour hollow metal doors to 90-minute wood/plastic composite assemblies. Engineered for commercial applications where flush appearance, smooth 180° operation, and corrosion resistance are essential, the 416SS is a trusted choice for exterior and full size entry doors.

Product Specs

Subcategory:
Hinges and Pivots
Product Group:
Door Hinges and Pivots
Product Type:
Invisible Hinges
Product Subgroup:
Concealed Hinges
Commercial/Residential:
Commercial
Duty Level:
Heavy Duty
Electronic:
No
Corner Type:
Radius
Series:
416 Series
Product Function:
Invisible Hinges
Product Finish:
US32D - Satin Stainless Steel
Product Size:
4-5/8"
Product Category:
Door Hinges and Pivots
Product Substrate:
Alloy Steel
Department:
Door Hardware

SOSS 416SSUS32D – Frequently Asked Questions

1) Will a SOSS 416SS invisible hinge work on a 1-3/8 inch door?
Yes, 1-3/8 inches is the minimum material thickness for the 416SS, so a standard 1-3/8 inch door is the thinnest it can go into, and anything thicker (including 1-3/4 inch commercial doors) is fine. It cuts into wood or metal doors. Below 1-3/8 inches there isn't enough material to house the hinge body, so a thinner cabinet or closet door needs a smaller SOSS model instead.
2) Is the SOSS 416SS fire rated, and for how long?
It's UL labeled, and the rating depends on the door assembly it goes into: up to and including 3 hours on hollow metal, sheet metal, tin clad, and steel composite fire doors and frames; up to 20 minutes on wood core doors and frames; and up to and including 90 minutes on wood/plastic composite doors and frames with Georgia Pacific FS 1 or FS 2 banding. The hinge does not carry a rating on its own, the door assembly does, so match it to the label on your door.
3) Does an invisible hinge like the SOSS 416 let the door open a full 180 degrees?
Yes. The 416SS is a single action hinge with a full 180 degree swing, so the door lays back flat against the wall in one direction. Single action means it swings one way only, not both, so if you need a door that pushes and pulls you want a double acting pivot rather than a concealed hinge.
4) Are SOSS 416SS invisible hinges suitable for exterior or coastal doors?
They're built of complete 316 stainless steel in a Satin Stainless Steel (US32D) finish, and the listed applications include exterior and full size entry doors. 316 is the marine grade stainless, which is what you want where salt air or washdown chemicals attack a plated hinge. Note the hinge body is concealed inside the door edge, so only the knuckle line sees weather at all.
5) What size is the SOSS 416 hinge and what finish does it come in?
The 416SS is the 4-5/8 inch full size door style hinge in the 416 Series, and it is sold in one finish only: 630 satin stainless steel, listed as US32D. There is no other finish option on the 416SS, so if the rest of your openings are bright brass or oil rubbed bronze this one will not match them.
6) Do SOSS 416SS hinges come with screws, or do I need to buy fasteners separately?
Wood and machine screws are both in the box, which covers a wood door into a wood jamb and a metal door or frame with tapped holes. What is not included is the router template and cutting bit, and that is the part that decides the job: the mortise has to be cut to SOSS's pattern in both the door edge and the jamb. Screw holes are not counter bored on this model.
7) Can I retrofit SOSS invisible hinges onto a door that currently has butt hinges?
Not as a swap. A butt hinge mounts on the face of the door edge and jamb; the 416SS mortises fully into both, so the old butt cutouts stay visible and the new pockets have to be routed in fresh material. On a retrofit that usually means a new door and a new jamb, or filling and refacing. It's a specify-at-new-door decision, not a change-out.
8) Is the SOSS 416 heavy duty enough for a school or hospital corridor door?
It's rated commercial, heavy duty, and the listed applications run to educational facilities, healthcare, government buildings, offices, retail, warehouse, and multi-tenant residential. Size the hinge count by weight as well as height on those doors, one hinge per 60 lbs, since institutional doors are often heavier than the height math alone accounts for.
9) Does the SOSS 416SS have square or radius corners on the mortise?
Radius corners. That matters at install: the pockets can be cut with a router and the correct SOSS template without hand chiseling the corners square, which is what makes these practical to fit in the field on both the door edge and the jamb.
10) Can I use a SOSS 416SS with an electric strike or transfer power through it?
No. The 416SS is a mechanical hinge with no power transfer and no electrified option, so any electrified lock, maglock, or access control on the opening needs its own path: an electric power transfer hinge or a door loop. It also has no closer function built in, so a fire door that needs to self close needs a separate closer.
11) Where do the hinges go on the door, and how much clearance does an invisible hinge need to open?
SOSS publishes the layout drawings for the 416 rather than leaving it to guess: a hinge location sheet, a cased jamb detail, a 90 degree open detail, and an open clearance detail. Pull those before you rout, because concealed hinges swing on a linked arm and the door edge sweeps a wider arc than a butt hinge does, which is what the clearance detail is there to settle against your casing and adjacent walls.
12) Is the SOSS 416SS handed, or does one part number cover left and right doors?
One part number covers both. Invisible hinges like the 416SS are symmetrical and mortise into the door edge and jamb the same way regardless of swing direction, so there's nothing to specify for handing when you order. Confirm the swing on your drawings for hinge location and clearance, not for the hinge itself.
How fast can I get the SOSS 416SSUS32D delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the SOSS 416SSUS32D come with a warranty?
Absolutely. The SOSS 416SSUS32D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the SOSS 416SSUS32D?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the SOSS 416SSUS32D from ZenSupply?
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