Hager BB1173 Half Surface Ball...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$94.18
$52.79
Hager BB1173 Half Surface Ball Bearing Hinge - 4-1/2" Steel Commercial Grade with 5 Knuckles

Hager BB1173 Half Surface Ball Bearing Hinge - 4-1/2" Steel Commercial Grade with 5 Knuckles

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Model: HAG-BB1173 4-1/2 US26D
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$52.79
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Hager BB1173 Half Surface Ball Bearing Hinge - 4-1/2" Steel Commercial Grade with 5 Knuckles

Professional Half Surface Hinge Solution for Commercial Applications

The Hager BB1173 half surface ball bearing hinge delivers reliable performance for regular weight hollow metal or wood composite doors with hollow metal frames requiring medium frequency service. This 4-1/2" steel hinge features dual ball bearings and 5-knuckle construction with ANSI A8412 certification. The reversible design accommodates 1-3/8" doors with beveled surface leaf construction and non-rising removable pin with button tip and plug for secure operation.

Professional Features & Benefits

  • Dual Ball Bearing System: Two precision ball bearings provide smooth, long-lasting operation and reduced friction for consistent door movement.
  • 5-Knuckle Construction: Enhanced strength and stability with five knuckles distributing load evenly across the hinge for commercial durability.
  • Half Surface Design: One leaf mortised in frame, other surface applied to door face - ideal for wood doors with wood frames or metal core doors with hollow metal frames.
  • Reversible Configuration: Field-reversible design allows installation on left or right-hand doors for installation flexibility.
  • ANSI A8412 Certified: Meets ANSI/BHMA standards for commercial-grade performance and reliability in medium duty applications.
  • Steel Construction: Durable steel construction with steel pin provides exceptional strength for regular weight door applications.
  • Non-Rising Removable Pin: Button tip and plug design allows easy pin removal for maintenance while preventing accidental pin displacement during operation.
  • Multiple Finish Options: Available in USP, US10, US10A, US10B, and US26D finishes to match various architectural requirements.
  • Two ball bearings. Non-rising removable pin with button tip and plug.

Technical Specifications

  • ANSI/BHMA: ANSI A8412
  • Applications: For use on regular weight hollow metal or wood composite doors with hollow metal frames requiring medium frequency service.
  • Bearing Type: Ball Bearing
  • Certifications: ANSI A8412
  • Commercial/Residential: Commercial
  • Duty Level: Medium Duty
  • Fastener Size - Machine: Door Leaf: 1/2" x 12-20" FH.
  • Features: Half Surface, 5-Knuckle, Ball Bearing, Standard Weight
  • Finishes: USP, US10, US10A, US10B, US26D.
  • Knuckles: 5
  • Material: Steel with Steel Pin;
  • Notes: Beveled surface leaf
  • Subcategory: Half Surface Commercial Hinges

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness of 1-3/8" and frame compatibility for half surface mounting.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door face and frame mortise area.
  3. Prepare door and frame by drilling required holes for 1/2" x 12-20" FH machine screws on door leaf and mortising frame leaf as specified.
  4. Install mounting hardware including thru-bolts and grommets for wood door applications, securing the hinge to door and frame per manufacturer torque specifications.
  5. Adjust hinge alignment ensuring beveled surface leaf properly contacts door edge and verify smooth operation throughout full door swing.
  6. Test hinge operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Hager Quality?

Hager commercial hinges are manufactured in accordance with ANSI/BHMA A156.1 standards and deliver professional-grade reliability with steel construction and dual ball bearing operation. The BB1173 features ANSI A8412 certification for medium duty commercial applications. Engineered for demanding commercial applications where dependable performance and architectural compliance are essential.

Full mortise commercial hinge engineered to meet or exceed ANSI standards for door weight, frequency of use, and finish durability.

Product Specs

Subcategory:
Half Surface Commercial Hinges
Knuckles:
5
Product Group:
Door Hinges and Pivots
Product Subgroup:
Half Surface Hinges
Product Type:
Half Surface Hinges
Features:
Half Surface, 5-Knuckle, Ball Bearing, Standard Weight
ANSI/BHMA:
ANSI A8412
Duty Level:
Medium Duty
Bearing Type:
Ball Bearing
Commercial/Residential:
Commercial
Product Model:
BB1173
Product Size:
4.5" x 4.5"
Product Category:
Door Hinges and Pivots
Product Substrate:
Steel
Department:
Door Hardware

Hager HAG-BB1173 4-1/2 US26D – Frequently Asked Questions

1) What is a half surface hinge and when do I use one instead of a full mortise hinge?
On the Hager BB1173, one leaf mortises into the frame and the other surface-applies to the face of the door. That's the point of a half surface hinge: you only have to mortise the frame. It's the go-to when the door face can't take a mortise or you're hanging a metal-core or wood composite door in an existing hollow metal frame. If both the door edge and the frame are prepped for standard hinge pockets, a full mortise hinge is the normal choice instead.
2) Will the Hager BB1173 hinge hold up on a busy commercial door, or is it too light?
Medium frequency service is the rating, on regular weight doors. The BB1173 is a medium duty commercial hinge with two ball bearings and five knuckles, certified to ANSI A8412. That covers offices, classrooms, retail back-of-house, and multi-family corridors. For a heavy door or a high-traffic entrance cycling all day, you want a heavy weight, high frequency hinge instead, not this one.
3) Do I have to order left hand and right hand versions of the BB1173 separately?
No. The BB1173 is reversible, so the same hinge works on a left or right hand door. You order by size and finish only, which is why it's a sensible hinge to stock across a building where the openings swing both ways.
4) What else can I use if the Hager BB1173 isn't available in the finish I need?
The BEST F173 steel half surface hinge is the closest equivalent we carry, also medium duty, from BEST's Architectural Hinges line. One real difference to weigh: the F173 is a plain bearing hinge, while the BB1173 runs two ball bearings. On a door with a closer on it, or any opening where the hinge is carrying real weight through a lot of cycles, the ball bearing version is the one you want.
5) What is the closest equivalent to the Hager BB1173 half surface hinge from another manufacturer?
The BEST F173 is the nearest match. Both are steel half surface hinges rated for medium duty commercial service, so both mount one leaf mortised into the frame and the other surface applied to the door face, and both are built for the same traffic level. The BB1173 is a 4-1/2" x 4-1/2" hinge with 5 knuckles and ball bearings; the F173 is a plain bearing hinge with a removable pin. If you are matching an existing half surface opening at medium frequency, either family covers that mounting condition, with bearing type being the working difference.
6) Can I remove the pin on the Hager BB1173 to take the door down?
Yes. It uses a non-rising removable pin with a button tip and plug, so you can drive the pin and lift the door off for service without pulling the hinge leaves. Non-rising means the pin won't creep up out of the barrel as the door swings. Note that a removable pin on an out-swinging exterior opening is a security consideration, so a non-removable pin or a security stud hinge is the better call there.
7) What screws come with the Hager BB1173, and do I need anything extra for a wood door?
The door leaf takes 1/2 inch 12-20 flat head machine screws. For a wood door application, plan on thru-bolts and grommets to pull the surface leaf tight to the door face rather than relying on screws into the door skin alone. You'll also need to mortise the frame leaf, since only the door side is surface applied.
8) Is the Hager BB1173 hinge ANSI certified for a spec job?
It carries ANSI A8412 certification, which is the ANSI/BHMA designation for this hinge class and duty level. If the hardware schedule calls out A8412 for the half surface openings, the BB1173 meets that line.
9) Can I match the Hager BB1173 to hinges from another manufacturer already in my building?
Hager publishes a commercial hinge cross reference that maps its models against other manufacturers' equivalents, which is the right way to line the BB1173 up with whatever half surface hinge is already hanging on your other openings. For a straight swap, the two things to confirm on the door are the hinge size and that the existing hinge is also half surface, one leaf mortised in the frame and one on the door face.
10) If I am standardizing half surface hinges across a facility, how do the Hager BB1173 and BEST F173 line up?
Both sit in the same service class: steel half surface hinges rated medium duty, the BEST F173 within its Architectural Hinges series. For a facility standard, the decision usually comes down to bearing type and knuckle count, since those are what a maintenance crew will see when they pull a hinge off a door. The BB1173 is a 5-knuckle ball bearing hinge in a 4-1/2" x 4-1/2" size carrying an ANSI A8412 certification; the F173 is a plain bearing hinge with a removable pin. Picking one bearing type facility-wide keeps replacements interchangeable across the doors.
11) What finishes does the Hager BB1173 hinge come in?
Five: 612 satin bronze, 613 oil-rubbed satin bronze, 626 satin chrome, US10A antique bronze, and 600 primed for painting. The 600 primed option is the one to pick when the hinges get painted to match a frame color, and 626 satin chrome is the usual match for satin-chrome or brushed-nickel lever trim already on the door.
12) Does the surface leaf on this hinge sit flat against the door, or does it stick out at the edge?
The surface leaf is beveled. That bevel lets the leaf sit down against the door face where it meets the door edge instead of leaving a proud square edge, which matters on a half surface hinge because that leaf is exposed on the face of the door where people see and brush past it.
13) How many hinges do I need per door, and where do they go?
Hinge count and spacing follow standard commercial hinge locations rather than anything specific to the BB1173. Hager publishes a standard hinge locations chart, and a half surface size options sheet covering which hinge size suits which door, both worth pulling before you prep the frame. Rule of thumb on the floor: three hinges up to a 7 foot 6 inch door, four beyond that.
How fast can I get the Hager HAG-BB1173 4-1/2 US26D 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 HAG-BB1173 4-1/2 US26D come with a warranty?
Absolutely. The Hager HAG-BB1173 4-1/2 US26D 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 HAG-BB1173 4-1/2 US26D?
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 Hager HAG-BB1173 4-1/2 US26D from ZenSupply?
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