Hager 1750 Full Mortise Spring...
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$43.28
Hager 1750 Full Mortise Spring Hinge with Fasteners, Square Corners

Hager 1750 Full Mortise Spring Hinge with Fasteners - Square Corners, Grade 1 BHMA

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Model: 1750 3-1/2X3-1/2 US26D
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Hager 1750 Full Mortise Spring Hinge with Fasteners - Square Corners, Grade 1 BHMA

Professional Spring Hinge Solution for Automatic Door Closing

The Hager 1750 Full Mortise Spring Hinge delivers reliable automatic door closing functionality with Grade 1 BHMA certification for residential applications. Available in 3-1/2" x 3-1/2" and 4" x 4" sizes, this steel construction spring hinge supports door weights from 45-75 lbs with 0.097 gauge material thickness. ANSI A156.17 compliant design ensures professional performance with included fasteners for complete installation.

Professional Features & Benefits

  • Door Weight Capacity: Engineered to support 45-75 lbs maximum door weight for reliable operation across various door types.
  • Grade 1 BHMA Certification: Meets ANSI A156.17 Grade 1 standards ensuring superior durability and performance for demanding applications.
  • Dual Size Options: Available in 3-1/2" x 3-1/2" and 4" x 4" configurations to accommodate different door and frame requirements.
  • Heavy-Duty Steel Construction: 0.097 gauge steel material provides exceptional strength and longevity for consistent spring tension performance.
  • Reversible Design: Field-reversible configuration allows installation on left or right-hand doors for maximum versatility.
  • Complete Installation Package: Includes appropriate fasteners with machine screws (4" - 1 X 9) and wood screws (3-1/2" - 3/4 X 9) for immediate installation.
  • Template Hole Pattern: Standardized mounting pattern simplifies installation and ensures proper alignment with door and frame preparation.
  • Removable Pin Design: Allows for easy hinge removal and door service without disturbing the frame-mounted hinge leaf.

Technical Specifications

  • ANSI/BHMA: BHMA, ANSI A156.17, Grade 1
  • Bearing Type: Spring Hinge
  • Box Quantity: 2 each
  • Case Quantity: 80 each
  • Certifications: Conforms to BHMA, ANSI A156.17, Grade 1
  • Commercial/Residential: Residential
  • Fastener Size - Machine: 4" - 1 X9
  • Fastener Size - Wood: 3-1/2" - 3/4 X9
  • Features: Reversible. Round corners 1/4" (6 mm) radius. Removable pin. Template hole pattern.
  • Finishes: 3-1/2" - 10R, US15, 1D, US26, US26D, US3, USP
  • Gauge: 0.097
  • Knuckles: 3
  • Material: Steel
  • Maximum Door Weight: 45-75 lbs.
  • Notes: For maximum versatility use all spring hinges or a combination of spring hinges and ball bearing hinges. Do not use plain bearing hinges.
  • Packaging: 2 pack with screws
  • Size: 3-1/2" X3-1/2"
  • Subcategory: Full Mortise Hinges

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness and weight compatibility with the 45-75 lb capacity range.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper hinge mortise preparation.
  3. Prepare door and frame by routing mortise pockets and drilling required holes per template specifications for full mortise installation.
  4. Install frame leaf first using appropriate fasteners, then mount door leaf ensuring proper alignment and clearance throughout swing range.
  5. Adjust spring tension as needed for proper door closing force, noting that full spring tension may not be required on all hinges in multi-hinge installations.
  6. Test door operation to verify smooth swing and consistent closing action. Refer to manufacturer documentation for complete installation details and spring tension adjustment procedures.

Professional Applications

  • Residential Entry Doors
  • Interior Passage Doors
  • Utility and Service Doors
  • Basement and Garage Access Doors
  • Storm Door Applications
  • Light Commercial Interior Doors
  • Multi-Family Housing Units

Why Choose Hager Quality?

Hager 1750 spring hinges deliver professional-grade reliability with heavy-duty steel construction rated for 45-75 lb door weights and Grade 1 BHMA certification. The 0.097 gauge steel material and ANSI A156.17 compliance ensure consistent spring performance and long-term durability. Engineered for residential applications where dependable automatic door closing is essential for energy efficiency and security.

Product Specs

Knuckles:
3
Subcategory:
Full Mortise Hinges
Product Group:
Door Hinges and Pivots
Product Subgroup:
Full Mortise Hinges
Product Type:
Full Mortise Hinges
ANSI/BHMA:
BHMA, ANSI A156.17, Grade 1
Bearing Type:
Spring Hinge
Commercial/Residential:
Residential
Features:
Reversible. Round corners 1/4" (6 mm) radius. Removable pin. Template hole pattern.
Product Model:
RC1749
Product Function:
Spring Hinges
Product Substrate:
Steel
Product Category:
Door Hinges and Pivots
Department:
Door Hardware

Hager 1750 3-1/2X3-1/2 US26D – Frequently Asked Questions

1) Do I need to order a left hand or right hand Hager 1750 spring hinge?
Neither. The 1750 is reversible, so the same hinge works on a left or right hand door and you set the hand at install. That matters for a property manager stocking spares: one part number covers every door in the building regardless of swing.
2) What size spring hinge do I need for a 1-3/8 inch interior door versus a 1-3/4 inch door?
The 1750 comes in 3-1/2 x 3-1/2 inch and 4 x 4 inch. The 3-1/2 inch size is the usual match for a 1-3/8 inch interior door, and the 4 inch size for a 1-3/4 inch door, since hinge height and leaf width step up with door thickness and width. Both sizes carry the same 45 to 75 lb rating, so pick on door thickness and width, not on weight.
3) Is the Hager 1750 a Grade 1 hinge, and what standard is it tested to?
It conforms to BHMA, ANSI A156.17, Grade 1. A156.17 is the standard covering self-closing hinges and pivots, which is the right standard for a spring hinge rather than the general A156.1 butt hinge standard. Note the 1750 is classified for residential use, so on a commercial opening under a code official's review, confirm your spec calls for a residential-rated self-closing hinge before you submit it.
4) The Hager 1750 is rated for residential use - what should I use on a heavy commercial door instead?
The Hager 1750 is designated residential and carries three knuckles in steel. For heavy commercial openings, the heavy weight hinges in the set are the McKinney TCA3386, a square corner 5 knuckle full mortise hinge in 4-1/2 by 4-1/2 rated heavy duty; the Stanley Security CB199 full mortise concealed bearing heavy weight hinge; and the BEST CB223 stainless steel concealed bearing heavy weight pivot reinforced hinge for beveled edge doors. Those are load-carrying hinges, not self-closing ones, so a heavy door that must close still needs a separate closer.
5) What is the difference between the Hager 1750 spring hinge and a standard ball bearing hinge like the Don-Jo BB74545?
The Hager 1750 is a spring hinge - the bearing type is a spring, so the hinge itself closes the door with no closer mounted on the head. The Don-Jo BB74545 is a full mortise ball bearing hinge in 4-1/2 inch by 4-1/2 inch steel with a square corner and 5 knuckles; it carries and pivots the door but does nothing to return it. If the opening needs the door to self-close, the 1750 is the hinge that does it. If a closer is already specified or the door is meant to stay where it is left, the BB74545 is the swing hardware for that.
6) My door frame is prepped for 4-1/2 inch hinges - will the Hager 1750 drop in?
No. The Hager 1750 comes in 3-1/2 inch by 3-1/2 inch and 4 inch by 4 inch. A frame mortised for 4-1/2 inch takes a 4-1/2 inch leaf: the Don-Jo BB74545 in steel, the Don-Jo BB84545 in brass with a satin chrome finish, the Don-Jo BB94545 in stainless steel, or the McKinney TCA2314 and TCA2317 square corner 5 knuckle hinges, all 4-1/2 by 4-1/2 full mortise. Those are ball bearing hinges rather than spring hinges, so a 4-1/2 inch opening that needs self-closing takes a closer with them.
7) I need the door to clear the opening fully for a wheelchair - is the Hager 1750 the right hinge?
The 1750 is a conventional full mortise hinge with a template hole pattern and a removable pin; it swings the door on the jamb line and the door edge still sits in the opening when open. To gain the full clear width, the swing clear hinge in the set is the BEST CB248, a steel full mortise concealed bearing swing clear hinge for square edge doors, which throws the door leaf out of the opening. The CB248 is not self-closing, so an opening that needs both clear width and automatic closing needs a closer with it.
8) Do Hager 1750 spring hinges come with screws, or do I have to buy fasteners separately?
Screws are in the box. The 1750 ships two hinges per pack with fasteners included: the 4 inch size comes with 1 x 9 machine screws and the 3-1/2 inch size with 3/4 x 9 wood screws. Machine screws on the 4 inch pack mean that size is set up for a tapped metal frame; the 3-1/2 inch wood screws suit a wood jamb.
9) Can I take a door off its hinges for service without removing the Hager 1750 from the frame?
Yes. The 1750 has a removable pin, so you pull the pins and lift the door out with both leaves still fastened to the door and jamb. On a spring hinge, relieve the spring tension before pulling a pin. For an apartment turn or a repaint, that saves re-cutting or re-drilling any mortise.
10) Does the Hager 1750 have square corners or round corners?
The corner detail on the 1750 is a 1/4 inch (6 mm) radius round corner. That matters because a routed mortise from a hinge template usually leaves a radiused pocket, and a radiused leaf drops straight into it. A true square corner leaf needs the mortise corners chiseled out square. If you are replacing an existing hinge, look at the corner of the leaf you're pulling out before you order.
11) Should I use a spring hinge or a door closer to make a door self-close?
A spring hinge like the 1750 puts the closing force in the hinge itself, so nothing mounts on the face of the door or the frame. That is the reason to pick it: no visible closer body, no arm, no soffit plate, and no extra prep beyond the hinge mortises you're already cutting. The tradeoff is control. A spring hinge gives you tension adjustment and that's it, with no separate closing speed, latching speed, or backcheck. On a door where you need controlled speed, a hold-open, or delayed action for accessibility, a surface closer is the right call. For a residential unit entry, a stair door, or a garage access door that just needs to shut behind people, the spring hinge does the job with less hardware on the opening.
12) What do I pair with Hager 1750 spring hinges in the remaining hinge positions on a three-hinge door?
Ball bearing hinges, not plain bearing. Options in the same square corner full mortise style include the Don-Jo BB74545 (4-1/2 x 4-1/2 steel, square corner, five knuckle) or the McKinney TCA2314 (4-1/2 x 4-1/2, square corner, five knuckle). Match the size and finish to your 1750s, and be aware those peers are 4-1/2 inch while the 1750 tops out at 4 inch, so on a 4 inch opening you'll want the ball bearing hinge in a matching 4 inch size.
13) Can I get the Hager 1750 spring hinge with electric through-wire for an access control door?
No, the 1750 is a mechanical spring hinge with no electrified option. If you need power transferred through the hinge to an electric strike or a mag lock circuit, that's a different hinge: the ACSI 5BB1 is a five knuckle ball bearing full mortise hinge, 4-1/2 x 4-1/2, with concealed electric through-wire (four wire, 28 gauge). Note that an electric through-wire hinge won't self-close the door, so on an access control opening that also needs to shut on its own, you're adding a closer.
14) Can I mix the Hager 1750 with other hinges on the same door?
Yes, within a limit. Hager states that the 1750 can be used as all spring hinges on the door or as a combination of spring hinges and ball bearing hinges, and that plain bearing hinges should not be used with it. Ball bearing partners in the comparable set include the Don-Jo BB74545 steel square corner 5 knuckle hinge and the BEST FBB212 steel ball bearing pivot reinforced hinge for square edge doors. Match the leaf size to what the frame is mortised for - the 1750 is 3-1/2 inch and 4 inch, while those two are cut for their own sizes.
15) Is a concealed bearing hinge like the BEST 1900R the same thing as the Hager 1750?
They are different mechanisms. The BEST 1900R is a steel full mortise concealed bearing standard weight hinge with a removable pin, medium duty, and the Stanley Security CB1960R is the same style of full mortise concealed bearing standard weight hinge. Concealed bearing means the bearing is hidden inside the knuckle for appearance; the hinge still only pivots. The Hager 1750 is a spring hinge, which stores tension and returns the door. Both the 1750 and the 1900R use a removable pin, so a door leaf can be lifted off either without pulling the frame leaf.
16) The door edge on my frame is beveled, not square - does that change which hinge I order?
It can. Several hinges are cut for one edge condition: the BEST CB223 stainless steel concealed bearing heavy weight pivot reinforced hinge is for beveled edge doors, while the BEST CB248 swing clear hinge and the BEST FBB212 ball bearing pivot reinforced hinge are for square edge doors. The Hager 1750 is a reversible full mortise spring hinge with a template hole pattern, ordered by leaf size in 3-1/2 inch and 4 inch rather than by edge type.
17) Do I get a brass or stainless hinge if I want something other than plated steel?
The Hager 1750 is a steel spring hinge, offered in finishes including 605 bright brass, 606 satin brass, 609 antique brass, 619 satin nickel, 625 bright chrome and 626 satin chrome. Where the base metal itself matters rather than the plating, the Don-Jo BB84545 is a brass hinge in satin chrome and the Don-Jo BB94545 is stainless steel with a square corner, both 4-1/2 inch by 4-1/2 inch, and the BEST CB223 is a stainless steel concealed bearing hinge. Those are ball bearing and concealed bearing hinges, so they pivot rather than close the door.
18) My door is 4-1/2 by 4 inch prep - is the Don-Jo BB74540 an option and how does it differ from the Hager 1750?
The Don-Jo BB74540 is a full mortise ball bearing hinge at 4-1/2 inch by 4 inch in satin chrome, standard duty - an unequal leaf size for frames prepped that way. The Hager 1750 comes in square 3-1/2 by 3-1/2 and 4 by 4 sizes and is a spring hinge that returns the door, with a satin chrome 626 finish among its options. The choice comes down to the mortise you already have and whether the door needs to close by itself.
19) What finishes do the Hager 1750 spring hinges come in?
Nine finishes, and all nine are offered in both the 3-1/2 inch and 4 inch sizes: bright brass (605), satin brass (606), antique brass (609), satin nickel (619), antique nickel (620), bright chrome (625), satin chrome (626), antique bronze (US10A), and dark bronze (US10R). If you're matching spring hinges to existing butt hinges on adjacent openings, 626 satin chrome and 605 bright brass are the two most common finishes already hanging in most buildings.
20) Is the Hager 1750 spring hinge steel or brass?
Steel, at 0.097 gauge, with three knuckles. The finishes are plating over that steel base, so a 605 bright brass 1750 is a brass-finished steel hinge, not solid brass. In a wet or coastal application where you'd normally reach for a solid brass or stainless hinge, that's the thing to weigh.
How fast can I get the Hager 1750 3-1/2X3-1/2 US26D delivered?
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Can I return it if it doesn’t work for me?
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Does the Hager 1750 3-1/2X3-1/2 US26D come with a warranty?
Absolutely. The Hager 1750 3-1/2X3-1/2 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 1750 3-1/2X3-1/2 US26D?
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