Don-Jo SH74545 Full Mortise Sp...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$42.16
$34.06
Don-Jo SH74545 Full Mortise Spring Hinge 4-1/2" x 4-1/2" Steel, Single Acting, Self-Lubricating

Don-Jo SH74545 Full Mortise Spring Hinge 4-1/2" x 4-1/2" Steel, Single Acting, Self-Lubricating

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Model: SH74545-600
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$42.16
$34.06
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Don-Jo SH74545 Full Mortise Spring Hinge 4-1/2" x 4-1/2" Steel — Single Acting, Self-Lubricating, UL Listed

The Don-Jo SH74545 is a commercial-grade Full Mortise Spring Hinge measuring 4-1/2" x 4-1/2" and constructed from durable steel at a 0.134 gauge. Designed for single-acting door applications, this non-handed hinge features self-lubricating bearings and easy spring tension adjustment, making it a reliable and low-maintenance solution for high-traffic commercial environments. UL Listed and conforming to ANSI K81071F, the SH74545 delivers professional-grade performance across a wide range of door hardware installations.

Key Features

  • Full Mortise Design: 4-1/2" x 4-1/2" full mortise configuration provides a clean, flush-mounted installation ideal for commercial door applications.
  • Heavy-Gauge Steel Construction: Manufactured from steel at 0.134 gauge for exceptional strength and long-term durability in demanding commercial settings.
  • Self-Lubricating Bearings: Integrated self-lubricating bearings reduce maintenance requirements and ensure smooth, consistent door operation over time.
  • Easy Spring Tension Adjustment: Tool-accessible spring tension adjustment allows installers and facility managers to fine-tune closing force without removing the hinge.
  • Single Acting Operation: Engineered for single-acting door swing, providing controlled, automatic door return in one direction.
  • Non-Handed Configuration: Non-handed design simplifies ordering and installation, eliminating the need to specify left- or right-hand orientation.
  • Multiple Finish Options: Available in finishes 600, 632, 633, 640, 651, and 652 to coordinate with a wide variety of door hardware and architectural styles.
  • Convenient Shelf Pack: Packaged in shelf packs of 24 units for efficient stocking and project-quantity purchasing.

Certifications & Compliance

  • UL Listed
  • ANSI K81071F
  • Commercial Grade

Technical Specifications

  • Subcategory: Hinges
  • Product Group: Door Hinges and Pivots
  • Product Subgroup: Spring Hinges
  • Product Type: Spring Hinges
  • Commercial/Residential: Commercial
  • Product Size: 4.5" x 4.5"
  • Product Category: Door Hinges and Pivots
  • Department: Door Hardware

Typical Applications

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

Why Don-Jo SH74545?

Don-Jo SH74545 Full Mortise Spring Hinges are built to commercial standards with 0.134-gauge steel construction, self-lubricating bearings, and UL Listed certification — delivering the dependability that demanding door hardware applications require. The non-handed, single-acting design paired with easy spring tension adjustment makes the SH74545 a practical, installer-friendly choice for facilities that need consistent, low-maintenance door control across multiple openings.

Manufacturer Resources

DON-JO Hinges

Product Specs

Subcategory:
Hinges
Product Group:
Door Hinges and Pivots
Product Subgroup:
Spring Hinges
Product Type:
Spring Hinges
Commercial/Residential:
Commercial
Product Model:
SH74545
Product Size:
4.5" x 4.5"
Product Category:
Door Hinges and Pivots
Department:
Door Hardware

Don-Jo SH74545-600 – Frequently Asked Questions

1) Will a Don-Jo SH74545 spring hinge close a door on its own without a door closer?
That's what it's for. The SH74545 is a single-acting spring hinge, so the spring inside the barrel returns the door in one direction and holds it closed without a surface closer on the door. Tension is adjustable at the hinge, so you can dial the closing force up on a door that isn't latching or back off on one that slams. On heavier or higher-traffic openings, installers commonly hang the door on two spring hinges plus a plain bearing hinge rather than relying on one.
2) Does the Don-Jo SH74545 need to be ordered left hand or right hand?
No handing to specify. The SH74545 is non-handed, so the same hinge works on a left or right hand opening, and you can stock one part number across a building instead of splitting inventory by hand. It is single acting, so it returns the door in one direction only, which is set by how the door is hung rather than by the hinge.
3) Will a 4-1/2 x 4-1/2 spring hinge drop into my existing hinge mortise?
The SH74545 measures 4-1/2 by 4-1/2 inches and is a full mortise hinge, so it seats in a standard 4-1/2 inch square hinge pocket, which is the usual prep on a commercial 1-3/4 inch door. Two things to check on the existing cutout: the leaves are square corner, so a door prepped with radius corners will need the mortise squared off or a radius corner hinge instead, and the leaf steel is 0.134 gauge, so verify the mortise depth lets the leaves sit flush.
4) Can a Don-Jo SH74545 spring hinge be used on a fire rated door?
The SH74545 is UL Listed and conforms to ANSI K81071F, which is the spec line an inspector or a fire door assembly submittal asks for on a self-closing hinge. That listing is what lets a spring hinge serve as the self-closing device on a labeled opening in place of a closer, subject to the door manufacturer's label and the AHJ's requirements for the specific assembly.
5) The door leaf has radius corners, not square. What spring hinge goes in instead of a Don-Jo SH74545?
The SH74545 is a square corner full mortise hinge, so a rounded leaf pocket needs a radius corner hinge cut to the same radius the door was prepped for. The Hager 1251 is a full mortise spring hinge with 1/4 inch round corners and the Hager 1252 is the same hinge with 5/8 inch round corners, both standard weight steel and medium duty. In 4 inch by 4 inch, Orca Hardware offers the SPR4014 at 1/4 inch radius and the SPR4058 at 5/8 inch radius. Measure the existing corner before ordering: 1/4 and 5/8 inch preps are not interchangeable.
6) Can I use a Deltana DASH95 in place of a Don-Jo SH74545?
No, not on the same opening. The DASH95 is a double action spring hinge with solid brass cover plates, meaning it lets the door swing and return from both directions. The SH74545 is single acting, closing the door in one direction only. Double action hinges belong on swinging service and cafe style doors that get pushed both ways; a single acting spring hinge belongs on a door that latches into a frame stop. The Deltana DASHS double action saloon hinge is in the same both-ways category. Confirm which way the opening swings before substituting either one.
7) What is the closest equivalent to a Don-Jo SH74545 spring hinge in a 4-1/2 inch by 4-1/2 inch square corner?
The McKinney 1502 is the direct match on size and prep: it is a square corner full mortise spring hinge in 4-1/2 inch by 4-1/2 inch, medium duty, the same footprint the SH74545 carries at 4.5 inch by 4.5 inch. Both are full mortise, so the door and frame mortise already cut for one accepts the other without rework. The Hager 1250 is the other square corner full mortise steel spring hinge in the group, standard weight and medium duty, if you are matching an existing Hager set on the rest of the building.
8) What is the smaller spring hinge to use when the door is prepped for 3-1/2 inch leaves instead of the Don-Jo SH74545?
The SH74545 is 4.5 inch by 4.5 inch and will not drop into a 3-1/2 inch mortise. The Emtek 95013 is a 3-1/2 inch by 3-1/2 inch spring hinge with square corners, UL Listed, plated steel, sold as a pair. Deltana offers the DSH35R4 and DSH35R4-A, both 3-1/2 inch by 3-1/2 inch single action spring hinges in steel with a 1/4 inch radius corner, which match the single acting operation the SH74545 provides. Match the corner style to the existing prep: square for the Emtek, 1/4 inch radius for the Deltana pair.
9) Which UL Listed spring hinges compare to the Don-Jo SH74545 for a fire door assembly?
The SH74545 is UL Listed and conforms to ANSI K81071F. Among the alternates, the Design Hardware UL spring hinge is medium duty and UL rated by name, and the Emtek 95013 is a UL Listed plated steel spring hinge in 3-1/2 inch by 3-1/2 inch square corner, sold as a pair. On the invisible side, the SOSS 216IC and 220IC carry a 20 minute fire rating. For a rated opening, verify the hinge listing against the door and frame label and the required rating duration before you order.
10) Which finish should I order the Don-Jo SH74545 in to match the other hardware on my doors?
Six finishes cover it: 600 primed for painting, 632 bright brass, 633 satin brass, 640 dark satin bronze, 651 bright chrome, and 652 satin chrome, all on steel. Match the BHMA number on your existing lever or lockset rather than the name, since 632 and 651 both read as shiny and 633 and 652 both read as brushed. The 600 primed option is the one to take when the frame and hinges are getting painted out with the door.
11) Should I use a spring hinge or a door closer on a commercial door?
A spring hinge like the SH74545 puts the closing force inside the hinge barrel, so nothing hangs on the face of the door and there's no arm to catch or vandalize. That suits stairwell doors, apartment entries, corridor doors, and anywhere the aesthetic or the abuse level rules out a surface closer. What it does not give you is a closer's control: no separate sweep and latch speed, no backcheck, no delayed action, no hold open. If the opening needs regulated closing speed or ADA opening force tuning, a surface closer is the right device and the spring hinge is not a substitute.
12) What is the difference between the Don-Jo SH74545 and the SOSS 216IC or 220IC invisible spring closer hinges?
Mounting method and appearance. The SH74545 is a full mortise steel spring hinge with visible knuckles at the door edge. The SOSS 216IC and 220IC are invisible spring closer hinges, heavy duty, that disappear entirely when the door is shut, and both carry a 20 minute fire rating. The SOSS units set minimum door thickness: the 220IC is a 7 inch hinge requiring 2 inch minimum door thickness and the 218IC is a 7 inch heavy duty hinge requiring 1-3/4 inch minimum. Invisible hinges need their own routed pocket in the door edge and frame, not a standard hinge mortise, so this is a specification decision made before the door is prepped, not a field swap.
13) For a stainless steel spring hinge instead of a steel one, what replaces the Don-Jo SH74545?
The Hager 1150 is the stainless option: a full mortise spring hinge, standard weight stainless steel, medium duty. The SH74545 is steel at 0.134 gauge with finish options including 600 primed for painting, 632 bright brass, 651 bright chrome, and 652 satin chrome. Stainless is the usual call for kitchens, wash-down areas, pool corridors, and coastal exposure where a plated steel finish will not hold up. Both are full mortise, so the door prep does not change.
14) Are Pemko Markar FM400 and FS402 spring loaded hinges a substitute for the Don-Jo SH74545?
No. The Pemko Markar FM400 and FS402 are spring loaded continuous hinges built for toilet partitions, each rated to 80 lb load capacity, as are the FM900 and the FS902 in 304 stainless steel. A continuous hinge runs the full height of the door leaf and is fastened along its entire edge; the SH74545 is a full mortise hinge installed in individual mortises. They solve a partition door problem, not a commercial door opening. If you are hanging a restroom partition door, the Pemko units are the right family; for a swinging commercial door on standard hinge preps, stay with a full mortise spring hinge.
15) The existing frame has a Z hole pattern. Does a Don-Jo SH74545 fit, or do I need a different spring hinge?
Hole pattern has to match what is already drilled or the leaf will not land on the existing screw holes. Orca Hardware makes the SPR4058Z, a 4 inch by 4 inch 5/8 inch radius corner spring hinge in a Z hole pattern, medium duty, alongside the standard-pattern SPR4058 in the same size and radius and the SPR4040 in 4 inch by 4 inch square corner. Pull one existing hinge and lay it against the new leaf before committing to a building-wide quantity.
16) Do spring hinges need to be oiled or serviced?
Not routinely. The SH74545 runs on self-lubricating bearings, so there's no greasing schedule, which is the reason maintenance departments spec them across a lot of openings at once. The service item is tension: if a door stops latching, the fix is re-tensioning the spring at the hinge with the pin and wrench rather than pulling the hinge off the door.
17) How many Don-Jo SH74545 spring hinges come in a box?
The SH74545 ships in shelf packs of 24 hinges, which is a project quantity rather than a per-door pack. Work out your count before ordering: most openings using spring hinges get two spring hinges and one plain bearing hinge per door, so a 24 pack covers roughly a dozen doors on that layout.
18) Is the Don-Jo SH74545 heavy enough for an apartment building corridor door?
It's built for that duty. The leaves are steel at 0.134 gauge and the hinge is specified commercial, not residential, which is the distinction that matters when you are replacing a residential grade spring hinge that keeps failing on a high traffic opening. Self-lubricating bearings are the other half of it, since the wear point on a spring hinge in constant use is the bearing, not the spring.
19) Can I take the door off without unscrewing the Don-Jo SH74545 hinges?
No. The SH74545 is a full mortise spring hinge with the spring captive in the barrel, so the door comes off by backing the leaf screws out of the door and jamb, not by pulling a pin. If you want the ability to lift the door off for painting or moving, spring hinges built with a removable pin are the ones to spec: the BEST 2060R in square corner and the BEST RD2060R in radius corner are both plain bearing spring hinges with a removable pin, in standard weight medium duty.
20) Do I have to specify handing when cross-shopping the Don-Jo SH74545 against other spring hinges?
Not for the SH74545 itself, which is non-handed, so one part number covers both left and right hand openings. Corner style and size are what you must get right instead. The comparable single acting full mortise hinges divide on corner: square on the McKinney 1502 in 4-1/2 by 4-1/2 and the Hager 1250, 1/4 inch round on the Hager 1251, 5/8 inch round on the Hager 1252. For a property manager standardizing across a building, a non-handed hinge means one line item per finish instead of separate left and right quantities.
How fast can I get the Don-Jo SH74545-600 delivered?
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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 Don-Jo SH74545-600 come with a warranty?
Absolutely. The Don-Jo SH74545-600 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 Don-Jo SH74545-600?
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