Hager 790-904 Half Mortise Con...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$730.13
$524.89
Hager 790-904 Half Mortise Continuous Hinge, 1/8” Inset

Hager 790-904 Half Mortise Continuous Hinge with 1/8" Inset - 304 Stainless Steel

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Model: 790-904 83 US32D
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$730.13
$524.89
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Hager 790-904 Half Mortise Continuous Hinge with 1/8" Inset - 304 Stainless Steel

Professional Grade Continuous Hinge for Commercial Applications

The Hager 790-904 Half Mortise Continuous Hinge delivers professional-grade performance with 1/8" inset design for doors of any material. Constructed from 14 gauge (0.075") Type 304 stainless steel with ANSI A156.26 Grade 1 certification for 150-pound doors and Grade 2 for 300-pound doors. Features 1/4" diameter stainless steel pin with dual 6/6 nylon bearings between each knuckle for smooth operation and long-term durability.

Professional Features & Benefits

  • Heavy-Duty Construction: 14 gauge (0.075") Type 304 stainless steel construction provides exceptional corrosion resistance and durability for demanding commercial applications.
  • Maximum Door Capacity: Supports doors up to 300 pounds with maximum door thickness of 1-3/4" and maximum door length of 10'-0".
  • ANSI Grade 1 Certification: ANSI A156.26 Grade 1 rated for 150-pound doors and Grade 2 for 300-pound doors with UL listing for code compliance.
  • Fire Rating Compliance: Approved for up to 3-hour metal door applications and 90-minute wood composite door installations.
  • Precision Bearing System: 1/4" diameter stainless steel pin with dual 6/6 nylon bearings between each knuckle ensures smooth operation and extended service life.
  • Flexible Length Options: Available in standard lengths of 79", 83", 85", 95", and 119" with custom length options available.
  • ADA Upgrade Compatible: 1/8" inset design makes this hinge particularly useful for ADA upgrade work and retrofit applications.
  • Optional Features Available: Replacement moldings (M), wide throw, security studs, and Dutch door preparation (DUTCH) for specialized applications.

Technical Specifications

  • Certifications: ANSI A156.26 Grade 1 for 150-pound doors, UL
  • Clearance: 1/8" minimum hinge side plus standard lockside clearance
  • Commercial/Residential: Commercial
  • Door Reinforcement: Wood - None required up to 200 lbs. For metal doors, a 1/8" (3 mm) thick reinforcement plate is recommended along the hinge edge for proper thread engagement of the adjustment studs.
  • Electric Modifications: Power Transfer Preparation (EPT 2) or (EPT 10)
  • Fastener Size: #10-24 x 5/8" S/SDril-Kwik® (metal frame), #1/4-20 x 3/4" 2CDril-Kwik® (metal door), #10-16 x 1-1/4" S/SType AB (wood door)
  • Finishes: US32D
  • Fire Rating: Up to 3 hr. metal and 90 min. wood composite
  • Length: 79", 83", 85", 95", 119"
  • Length Options: Standard
  • Material: 14 Ga. (0.075") Type 304 Stainless Steel
  • Maximum Door Length: 10'-0"
  • Maximum Door Thickness: 1-3/4"
  • Maximum Door Weight: 300 lbs
  • Notes: Any nonstandard length hinge may require a custom hole pattern based on the requested length. Consult Hager Companies to address the field prep for the doors and frames.
  • Optional Features: Replacement Moldings (M), Wide Throw, Security Studs, Dutch Door Prep (DUTCH)
  • Special Features: 1/4" (6.3 mm) diameter Stainless Steel Pin. Dual 6/6 Nylon bearings between each knuckle. Not recommended for doors with a beveled edge on the hinge side. Useful for ADA upgrade work, 1/8" (3.2 mm) inset.
  • Subcategory: Continuous Geared Hinges

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness up to 1-3/4", maximum weight of 300 pounds, and 1/8" minimum hinge side clearance plus standard lockside clearance.
  2. For metal doors, install a 1/8" (3 mm) thick reinforcement plate along the hinge edge for proper thread engagement of the adjustment studs. Wood doors up to 200 pounds require no reinforcement.
  3. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces, noting that nonstandard length hinges may require custom hole patterns.
  4. Install fasteners per specifications: #10-24 x 5/8" S/S Dril-Kwik for metal frames, #1/4-20 x 3/4" 2C Dril-Kwik for metal doors, or #10-16 x 1-1/4" S/S Type AB for wood doors.
  5. For frame reinforcement on doors over 200 pounds, use 16-gauge channel reinforcement as specified.
  6. Test hinge operation to verify smooth function throughout the full range of motion and make final adjustments as needed. Note that this hinge is not recommended for doors with beveled edges on the hinge side.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Industrial and Warehouse Facilities
  • Government and Municipal Buildings
  • ADA Compliance Retrofit Projects
  • Fire-Rated Door Applications

Why Choose Hager Quality?

Hager continuous hinges deliver professional-grade reliability with 14 gauge Type 304 stainless steel construction and ANSI A156.26 Grade 1 certification for demanding commercial applications. The precision bearing system with dual nylon bearings ensures smooth operation and extended service life. Fire-rated up to 3 hours for metal doors and UL listed for code compliance and safety assurance.

Hager's Roton® continuous geared hinge distributes door weight along the full hinge length, minimizing lateral wear in high-traffic applications.

Product Specs

Subcategory:
Continuous Geared Hinges
Product Group:
Door Hinges and Pivots
Product Subgroup:
Continuous Hinges
Product Type:
Half Surface Hinges
Commercial/Residential:
Commercial
Product Model:
790-904
Product Substrate:
304 Stainless Steel
Product Category:
Door Hinges and Pivots
Department:
Door Hardware

Hager 790-904 83 US32D – Frequently Asked Questions

1) Will the Hager 790-904 continuous hinge work on a door with a beveled hinge edge?
No. The 790-904 is not recommended for doors with a beveled edge on the hinge side. The geared leaves need a square hinge edge to sit flat, so if your existing doors are beveled on the hinge stile you need a different hinge style. Everything else about the opening can check out and this one detail will still make it the wrong part.
2) How heavy a door can a Hager 790-904 half mortise continuous hinge carry?
Up to 300 pounds, on doors up to 1-3/4 inches thick and up to 10 feet tall. The ANSI A156.26 certification reads Grade 1 at 150 pound doors and Grade 2 at 300 pound doors, so if your spec calls for Grade 1 performance you are held to the 150 pound figure even though the hinge physically carries twice that.
3) Can I use the Hager 790-904 hinge on a fire rated door?
Yes, and it is UL listed. The 790-904 is approved up to 3 hours on metal doors and 90 minutes on wood composite doors, which covers the usual stair, corridor and shaft openings in a commercial building.
4) What clearance do I need on the hinge side for a Hager 790-904?
A minimum of 1/8 inch on the hinge side, plus your standard lockside clearance. That is what the 1/8 inch inset design is built around, and it is also why this hinge suits ADA upgrade work where an existing opening is being reworked rather than replaced. If your door is hung tight to the frame on the hinge edge, the door has to be trimmed to make that gap.
5) What is the difference between the Hager 790-904 continuous hinge and the BEST F173 half surface hinge?
They are different classes of hinge for the same door edge. The Hager 790-904 is a continuous geared hinge in 14 gauge (0.075") Type 304 stainless steel, running the height of the door in standard lengths of 79", 83", 85", 95", and 119", with a 1/4" diameter stainless steel pin and dual 6/6 nylon bearings between each knuckle, carrying doors up to 300 pounds and 1-3/4" thick. The BEST F173 is a steel half surface architectural hinge with a removable pin and a plain bearing, rated medium duty, so it is a set of individual leaves rather than a full-height gear. Choose on how the door load is carried: the 790-904 spreads weight along the entire hinge edge, while the F173 concentrates it at each hinge location.
6) Can a BEST F173 hinge be used instead of a Hager 790-904 on a heavy commercial door?
Check the duty rating before making that swap. The BEST F173 is rated medium duty and uses a plain bearing with a removable pin. The Hager 790-904 is built for commercial service at up to 300 pounds of door weight, with a maximum door thickness of 1-3/4" and a maximum door length of 10'-0", and it is UL listed and fire rated up to 3 hours on metal doors and 90 minutes on wood composite doors. On an opening where the door weight, the traffic, or a fire label is driving the selection, the 790-904 is the part that carries those ratings.
7) Which screws come into play installing a continuous geared hinge on a metal frame versus a wood door?
Three fastener specs depending on what you are screwing into: #10-24 x 5/8 inch stainless Dril-Kwik for a metal frame, 1/4-20 x 3/4 inch 2C Dril-Kwik for a metal door, and #10-16 x 1-1/4 inch stainless Type AB for a wood door. Mixed openings, say a hollow metal frame with a wood door, use two different fasteners on the same hinge.
8) Can a Hager 790-904 continuous hinge be prepped for electrified hardware?
It can. Power transfer preparation is available as EPT 2 or EPT 10, so a card reader lock, electric strike or mag hold-open can be wired through the hinge edge rather than running a separate door loop. That prep is specified when the hinge is ordered, not added in the field.
9) What options should I specify when ordering a Hager 790 series continuous hinge?
Beyond length and the 630 satin stainless finish, the order options are replacement moldings (M), wide throw, security studs, and Dutch door prep (DUTCH). Wide throw is what you reach for when the door has to clear a deep trim or casing to swing fully; security studs add pull resistance on an out-swinging exterior opening; DUTCH covers a split door. Add power transfer prep here too if the opening is electrified.
10) Is a continuous geared hinge worth it over three butt hinges on a high traffic door?
On a door that gets hammered all day, yes. A continuous hinge like the Hager 790-904 carries the load along the full height of the door instead of concentrating it at three points, which is what stops the top hinge tearing out and the door sagging into the frame. Butt hinges are simpler and cheaper to replace one at a time; a continuous hinge is the fix for openings that keep coming back. The 14 gauge (0.075 inch) Type 304 stainless build with dual 6/6 nylon bearings between each knuckle on a 1/4 inch stainless pin is what carries that duty cycle.
11) For an ADA retrofit on an existing opening, is the Hager 790-904 or the BEST F173 the better fit?
The Hager 790-904 is the one built for that work: its 1/8" (3.2 mm) inset design is called out as useful for ADA upgrade work, and it needs a 1/8" minimum hinge side clearance plus standard lockside clearance. One caution on retrofits - it is not recommended for doors with a beveled edge on the hinge side, so verify the existing door edge first. The BEST F173 is a steel half surface hinge with a removable pin, which mounts as separate leaves and does not carry an inset dimension for gaining door clearance.
12) Which hinge should be specified for a corrosive or wash-down environment, the Hager 790-904 or the BEST F173?
Material decides it. The Hager 790-904 is Type 304 stainless steel at 14 gauge (0.075") with a 1/4" diameter stainless steel pin, and stainless resists corrosion in damp, coastal, and wash-down settings. The BEST F173 is a steel hinge in the Architectural Hinges series. Where moisture or chemical exposure is part of the environment, the stainless construction of the 790-904 is the material to specify.
13) Will a Hager 790-904 hinge hold up in a humid or wash-down environment?
Type 304 stainless throughout, 14 gauge (0.075 inch), with a 1/4 inch stainless pin and nylon bearings. That handles the corrosion exposure you get in kitchens, natatoriums, healthcare wash areas and coastal buildings better than a plated steel hinge, and the 630 satin stainless finish matches other stainless hardware already on those openings.
How fast can I get the Hager 790-904 83 US32D 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 Hager 790-904 83 US32D come with a warranty?
Absolutely. The Hager 790-904 83 US32D 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 Hager 790-904 83 US32D?
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
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