SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Unplated
Rating 4.6 | 195 Reviews | Our Item Number UIP-420UNP
Whether your doorway is made of wood or metal, rated 20 minutes or 3 hours, there is a Soss fire rated hinge that will comply and still give you the invisible look you expect from Soss.
$
409.69 Each
$401.50/ea for 5 $393.30/ea for 10
$585.27
SAVE 30%
Ends Oct 07
Ends Oct 07
Finish: Unplated
Product Info Minimum Door Thickness: 2", Height: 4-1/2", Width: 1-3/8", Depth: 1-41/64", Material: Steel, See more product details
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Size Info
- Minimum Door Thickness : 2"
- Height : 4-1/2"
- Width : 1-3/8"
- Depth : 1-41/64"
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Manufacturer Info
- Manufacturer Finish : UNP
- Manufacturer Part # : 420UNP
- Manufacturer : Soss
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Other Important Info
- Key Features : Invisible from either side when closed
Moving pivot point remains inside hinge during travel
Deep mortise of hinge assures a strong installation - Material : Steel
- Product Finish : Unplated
- Sold : 1 Hinge Per Box
- Product Type : Fire Rated Invisible Hinge
- Model # : 420FR
Manufacturer Resources
Installation Hardware
Professional Self-Centering Vix Bit, Essential Drill Bit for Hinge Installation Other - Soss 420 Series Invisible Hinges
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![SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Chrome](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46931&p=sq-sm "SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Chrome")
SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Chrome ![SOSS 220 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Alloy Steel Satin Brass](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46923&p=sq-sm "SOSS 220 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Alloy Steel Satin Brass")
SOSS 220 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Alloy Steel Satin Brass ![SOSS 220 Invisible Hinge with Closer, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth plus 7-3/8" Closer, Alloy Steel Satin Nickel](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46920&p=sq-sm "SOSS 220 Invisible Hinge with Closer, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth plus 7-3/8" Closer, Alloy Steel Satin Nickel")
SOSS 220 Invisible Hinge with Closer, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth plus 7-3/8" Closer, Alloy Steel Satin Nickel ![SOSS 220 Invisible Hinge with Closer, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth plus 7-3/8" Closer, Satin Stainless Steel](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46925&p=sq-sm "SOSS 220 Invisible Hinge with Closer, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth plus 7-3/8" Closer, Satin Stainless Steel")
SOSS 220 Invisible Hinge with Closer, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth plus 7-3/8" Closer, Satin Stainless Steel ![SOSS 220 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Alloy Steel Satin Chrome](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46922&p=sq-sm "SOSS 220 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Alloy Steel Satin Chrome")
SOSS 220 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Alloy Steel Satin Chrome ![SOSS 420 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Steel Unplated](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46919&p=sq-sm "SOSS 420 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Steel Unplated")
SOSS 420 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Steel Unplated ![SOSS 220 Invisible Hinge with Closer, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth plus 7-3/8" Closer, Bright Stainless Steel](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46924&p=sq-sm "SOSS 220 Invisible Hinge with Closer, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth plus 7-3/8" Closer, Bright Stainless Steel")
SOSS 220 Invisible Hinge with Closer, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth plus 7-3/8" Closer, Bright Stainless Steel ![SOSS 220 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Alloy Steel Black E-Coated](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46921&p=sq-sm "SOSS 220 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Alloy Steel Black E-Coated")
SOSS 220 Invisible Hinge, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Alloy Steel Black E-Coated ![SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Black E-Coat](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46930&p=sq-sm "SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Black E-Coat")
SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Black E-Coat ![SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Bright Stainless Steel](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46926&p=sq-sm "SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Bright Stainless Steel")
SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Bright Stainless Steel ![SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Nickel](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46929&p=sq-sm "SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Nickel")
SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Nickel ![SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Brass](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46932&p=sq-sm "SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Brass")
SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Brass ![SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Unplated](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46928&p=sq-sm "SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Unplated")
SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Unplated ![SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Stainless Steel](https://cdn-media.cabinetparts.com/primary_product.jpg?id=46927&p=sq-sm "SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Stainless Steel")
SOSS 420 Fire Rated Invisible Hinge for 2" Minimum Door Thickness, 1-3/8" Width x 4-1/2" Height x 1-41/64" Depth, Satin Stainless Steel 
Our customers say Soss products...
4.6 out of 5
based on 195 ratings
based on 195 ratings
"These reviews are from our customers who have purchased Soss products."
- 4 of 5 Good Stuff July 31st, 2026
by mark from Katy, TXThis is a first try using this hinge and also the first hinge I've used with Shaper Origin to cut the receiving part. Its tiny and I'm not commonly using tiny so can't compare. I like it and I'm interested in using this one again.
This review is about similar Soss Hinges. (UIP-BH085)
- 5 of 5 Hinges were just right July 23rd, 2026
by Garnet from Lamoni, IAHad a Martha Washington sewing desk that needed new hinges and we found these the old ones came off the new ones went on and now it looks perfect. Let me know if you want pictures.
This review is about similar Soss Hinges. (UIP-100CUS26D)
- 5 of 5 Installing barrel hinges July 9th, 2026
by Lyle from Rapid City, SDfirst time installing the barrel hinges fir different thickness of wood box sides and top materials. the installation was very straight forward and easy to complete. I was very happy with the end result.
This review is about similar Soss Hinges. (UIP-BH144)
- 5 of 5 SOSS 101 Invisible Hinges April 8th, 2026
by Richard from Mukilteo, WAThere is a marked difference between the SOSS 101 invisible hinges and those made in other countries. The quality, fit, finish and the smoothness of operation of the SOSS hinges is just superior. Yes, they cost more but is your project worth the cost in long term.
This review is about similar Soss Hinges. (UIP-101CUS19)
- 5 of 5 Pretty ingenious March 3rd, 2026
by Travis from Golden, COThese things are super cool and seem like they solve some problems in a unique way. But beware: they're pretty fragile! Don't expect to be able to test fit them and remove them over and over, or you'll break them (speaking from experience)
This review is about similar Soss Hinges. (UIP-BH085)
Reviews about us...
- 5 of 5 | September 29th, 2026
They had the replacement part and delivered it quickly. Very happy with Cabinet Parts.
- 4 of 5 | September 28th, 2026
I love the heft and look of the bronze plates. My only concern is with the mounting screws. For such a large plate and for security matters the screws are only 1/2 inch long. They would be easy to pry off. I have bought 1 inch screws, (the longest that wo
- 4 of 5 | September 27th, 2026
we had significant difficulty deciphering the measurements needed. Cabinet parts develop drawings to illustrate the needed dimensions.
- 5 of 5 | September 27th, 2026
And fast shipping . Thank you!
- 5 of 5 | September 26th, 2026
I’ve been looking for these parts and you delivered! Thanks
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