Don-Jo PB74545 Full Mortise Pl...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$20.86
$18.31
Don-Jo PB74545 Full Mortise Plain Bearing Hinge 4-1/2" x 4-1/2" Steel for Medium Weight Doors

Don-Jo PB74545 Full Mortise Plain Bearing Hinge 4-1/2" x 4-1/2" Steel for Medium Weight Doors

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Model: PB74545-652
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$20.86
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Don-Jo PB74545 Full Mortise Plain Bearing Hinge 4-1/2" x 4-1/2" Steel for Medium Weight Doors

The Don-Jo PB74545 is a full mortise plain bearing hinge engineered for commercial door applications, measuring 4-1/2" x 4-1/2" and constructed from durable steel material at a 0.134 gauge. Designed specifically for medium weight doors in low-frequency use environments, this hinge meets ANSI A8133 standards and is template-compatible for precise, professional installation. Available in a wide selection of finishes including 600, 632, 633, 639, 640, 651, and 652, the PB74545 offers versatile aesthetic options to complement any commercial door hardware specification.

Key Features

  • Full Mortise Design: Full mortise installation provides a clean, flush fit within the door and frame for a professional appearance and secure mounting in commercial applications.
  • Precise Sizing: Measures 4-1/2" x 4-1/2" to suit standard commercial door preparations and ensure proper coverage and support.
  • Steel Construction: Manufactured from steel at 0.134 gauge, delivering reliable strength and durability suited to commercial door hardware demands.
  • Medium Weight Door Compatibility: Specifically engineered for medium weight doors in low-frequency use environments, ensuring appropriate load management and long-term performance.
  • ANSI A8133 Compliant: Meets ANSI A8133 standards and is template-compatible for accurate, code-compliant installation.
  • Wide Finish Selection: Available in finishes 600, 632, 633, 639, 640, 651, and 652 to match a variety of architectural and design requirements.
  • Non-Removable Pin Option: Optional non-removable pin (NRP) configuration available for enhanced security — specify NRP as a prefix when ordering.
  • Convenient Shelf Pack: Sold in a shelf pack of 24 units, making it practical for contractors and distributors managing commercial projects.

Certifications & Compliance

  • ANSI A8133 Compliant
  • ANSI Template Compatible
  • Commercial Grade Application

Technical Specifications

  • Product Group: Door Hinges and Pivots
  • Product Subgroup: Full Mortise Hinges
  • Product Type: Hinges
  • Subcategory: 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
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Don-Jo PB74545?

Don-Jo full mortise plain bearing hinges are built to commercial-grade standards, combining steel construction at 0.134 gauge with ANSI A8133 compliance to deliver consistent, dependable performance in medium-duty door applications. The PB74545's template compatibility and broad finish selection make it a practical, specification-ready choice for professional installers and commercial hardware projects of all scales.

Manufacturer Resources

DON-JO Hinges

Product Specs

Product Group:
Door Hinges and Pivots
Product Subgroup:
Full Mortise Hinges
Product Type:
Full Mortise Hinges
Subcategory:
Hinges
Bearing Type:
Plain Bearing
Commercial/Residential:
Commercial
Product Model:
PB74545
Product Function:
Plain Bearing
Product Size:
4.5" x 4.5"
Product Category:
Door Hinges and Pivots
Department:
Door Hardware
Product Substrate:
Steel

Don-Jo PB74545-652 – Frequently Asked Questions

1) Will the Don-Jo PB74545 hinge fit a standard 4-1/2 inch commercial door prep?
The PB74545 is a 4-1/2 x 4-1/2 inch full mortise hinge cut to ANSI template, so it drops into an existing 4-1/2 inch square-corner mortise in the door edge and frame without rework. Full mortise means both leaves sit flush, one in the door, one in the jamb. If the openings in your building are already hung on 4-1/2 inch hinges, this matches the prep.
2) Is a plain bearing hinge like the Don-Jo PB74545 good enough for a high-traffic entrance?
No. The PB74545 is built for medium weight doors in low-frequency use, which means offices, closets, interior rooms, tenant units. A main entrance, a stairwell, a restroom door on a corridor, anything cycling all day, wants a bearing hinge instead. Plain bearing runs metal on metal at the knuckles; ball or concealed bearing carries the load on bearings and holds up under constant cycling. For a 4-1/2 x 4-1/2 opening that needs it, the Orca Hardware 3535 Series is a 4-1/2 x 4-1/2 square corner ball bearing commercial hinge.
3) How do I order the Don-Jo PB74545 with a non-removable pin for an out-swinging exterior door?
Specify NRP as a prefix on the model when you order. On any out-swing door the barrel sits outside, so without NRP someone can drive the pin and lift the door off the frame. The set screw in the NRP configuration blocks that. Worth noting the base hinge is rated for medium weight, low-frequency doors, so for a hard-used exterior opening look at a heavy duty NRP hinge such as the Hager BB1168 instead.
4) I need to run power through the door for an electric strike or electrified lock, can I use the PB74545?
No. The PB74545 is a plain mechanical hinge with no wire path through it. To transfer power through the hinge you need an electrified hinge: the BEST CECB179-12C is a steel full mortise concealed bearing electrified hinge with a 12-wire quick connect at medium duty, and the Command Access ETH-CB70 is a 3-knuckle standard weight energy transfer hinge, also medium duty. If you also need to monitor door position, the Command Access ETM-CB70 adds door position sensing. You can hang the rest of the leaf on PB74545 hinges and use one electrified hinge in the middle position.
5) My door has rounded corner hinge pockets, will the Don-Jo PB74545 work?
Check the corner before you order. The PB74545 is a 4-1/2 x 4-1/2 ANSI template hinge for standard commercial prep. Wood doors machined by a router commonly get a 1/4 inch or 5/8 inch radius corner, and a square leaf will not seat in a radius pocket without chiseling the corners out. If your existing hinges have rounded leaf corners, match that radius. The Orca 4014 Series is a 4 x 4 with a 1/4 inch radius corner plain bearing commercial hinge if your prep is 4 inch radius rather than 4-1/2 square.
6) Can the Don-Jo PB74545 carry a door with a closer on it?
Not a good match. A closer adds constant load and cycle count, and the PB74545 is specified for medium weight doors in low-frequency use. Doors with closers should go on a bearing hinge sized to the leaf. For a 4-1/2 x 4-1/2 opening, the Orca 3535 Series square corner ball bearing commercial hinge or the Ives 3CB1HW heavy weight concealed bearing full mortise hinge are the right direction. Save the PB74545 for the interior doors on the same job that have no closer.
7) What is the closest 4-1/2 by 4-1/2 commercial hinge to the Don-Jo PB74545 if a ball bearing knuckle is wanted instead of plain bearing?
The Orca Hardware 3535 Series is a 4-1/2 inch by 4-1/2 inch square corner commercial hinge rated medium duty with a ball bearing function, so it keeps the same 4.5 inch by 4.5 inch size and medium-duty commercial application as the Don-Jo PB74545 while changing the bearing to ball bearing. Both mortise into the same square corner door and frame prep at that size. The PB74545 uses a plain bearing knuckle, which is the usual choice on lower-frequency openings, while a ball bearing knuckle is the usual choice where the door cycles constantly.
8) Which plain bearing commercial hinge should be used when the door prep is 4 inch rather than 4-1/2 inch?
The Orca Hardware 4040 Series is a 4 inch by 4 inch square corner plain bearing commercial hinge in medium duty, and the Orca Hardware 4014 Series is the same 4 inch by 4 inch plain bearing hinge with a 1/4 inch radius corner for doors already prepped with rounded corners. Both carry the same plain bearing function as the Don-Jo PB74545, which is made in a 4.5 inch by 4.5 inch size and will not drop into a 4 inch mortise without rework.
9) What should be used instead of the Don-Jo PB74545 on a heavy door or a high-traffic entrance?
The Don-Jo PB74545 is built for medium weight doors in low-frequency use. Where the door is heavier or the opening cycles hard, the Ives 3CB1HW is a steel heavy weight concealed bearing full mortise hinge with 3 knuckles, the Hager BB1168 is a full mortise ball bearing heavy duty hinge furnished with a non-removable pin, and the Stanley Security FBB191 is a 5-knuckle full mortise hinge at 4.5 inch by 4.5 inch in heavy duty. The Stanley FBB191 and the PB74545 share the 4.5 inch by 4.5 inch full mortise footprint, so that swap stays in the same door prep.
10) Is the Hager 1129 plain bearing hinge a direct substitute for the Don-Jo PB74545?
No. Both are 4-1/2 inch plain bearing commercial hinges, but the Hager 1129 is a half mortise standard weight steel hinge and the Don-Jo PB74545 is full mortise. Half mortise mortises into the door and surface-applies to the frame, so the frame prep is different and the two are not interchangeable on an opening already cut for full mortise. The Hager 1129 is also rated heavy duty, where the PB74545 is intended for medium weight doors.
11) What 4-1/2 inch hinge should be used if the door needs to self-close without a closer?
The Stanley Security 2060R is a full mortise square corner spring hinge at 4.5 inch by 4.5 inch on a ferrous steel base, rated heavy duty. It carries a spring in the barrel to return the door, which the Don-Jo PB74545 does not do; the PB74545 is a plain bearing hinge for medium weight doors and needs a separate closer if the opening has to self-close. The two share the same 4.5 inch by 4.5 inch full mortise square corner prep.
12) Does the Don-Jo PB74545 hinge come in left and right hand versions?
Handing is not something you order on the PB74545. A full mortise butt hinge with a removable pin is non-handed, it works on a left or right hand door the same way, you just set it in the prep. The one ordering decision that does change with the door is the finish, and whether you want the NRP prefix for an out-swing opening.
13) What finishes does the Don-Jo PB74545 hinge come in, and which one matches my existing chrome lever?
Seven finishes on the PB74545: 600 primed for painting, 632 bright brass, 633 satin brass, 639 satin bronze, 640 dark satin bronze, 651 bright chrome, and 652 satin chrome, all over a steel base. Satin chrome levers on your doors are almost always 626 on brass or 652 on steel, so 652 is the match. Bright chrome trim takes 651. If the frames get painted, 600 primed saves you masking the hinge.
14) How many Don-Jo PB74545 hinges do I need to order per door?
Plan on three hinges per door on a standard commercial opening up to 7 feet 6 inches tall, and four on a taller door. The PB74545 ships in a shelf pack of 24, so one pack hangs eight doors at three per leaf. Every hinge is the same part regardless of position on the door.
15) What is the difference between the Don-Jo PB74545 and a concealed bearing hinge like the Ives 3CB1?
Bearing type is the whole difference. The PB74545 is a plain bearing hinge, 4-1/2 x 4-1/2, steel, rated for medium weight doors in low-frequency use. The Ives 3CB1 is a 3-knuckle concealed bearing full mortise hinge, also medium duty, where the bearing is hidden inside the knuckle so the barrel looks like a plain hinge but rolls on bearings. If the door sees regular traffic or carries a closer, go concealed bearing. If it is an interior door opened a few times a day, plain bearing is the right spend.
16) Can I use the Don-Jo PB74545 to replace worn hinges on apartment unit doors?
Yes, provided the existing hinges are 4-1/2 x 4-1/2 full mortise. The PB74545 is a steel commercial hinge at 0.134 gauge built for medium weight doors, which is what a typical multi-family unit entry or interior door is. Pull one existing hinge, measure leaf height and open width, and confirm it is 4-1/2 by 4-1/2 with square corners. Matching the finish across the building matters more than most people expect, so order all seven-finish choices off one code rather than mixing.
17) Does the Don-Jo PB74545 hinge meet ANSI requirements for a commercial spec?
The PB74545 is listed as meeting ANSI A8133 and is ANSI template compatible, which is the pairing a spec writer is looking for: the performance designation plus a leaf pattern that matches standard hollow metal and wood door prep. It is a commercial-rated hinge, 0.134 gauge steel, sized 4-1/2 x 4-1/2.
18) Can Emtek 91013 or 92013 plain bearing hinges replace the Don-Jo PB74545 on a commercial opening?
They are a different class of hinge. The Emtek 91013 is a residential duty plain bearing hinge and the Emtek 92013 is a heavy duty plain bearing hinge, both plated steel, both sold as a pair at 3-1/2 inch by 3-1/2 inch with square corners. The Don-Jo PB74545 is a commercial hinge at 4.5 inch by 4.5 inch sold in a shelf pack of 24. The size alone rules out a drop-in swap on a 4-1/2 inch commercial prep.
19) Is there a 4-1/2 by 4-1/2 hinge with a non-removable pin already fitted rather than ordering the Don-Jo PB74545 with the NRP prefix?
Yes. The Deltana CSB45N is a 4-1/2 inch by 4-1/2 inch square hinge supplied as a pair with a non-removable pin. The Don-Jo PB74545 reaches the same security detail through an optional NRP configuration specified as a prefix when ordering, and is a plain bearing hinge sold in a shelf pack of 24. Both land on the same 4-1/2 inch square prep, so the choice comes down to how the pin is specified and how the units are packed.
20) What hinge is used on a detention or high-abuse opening where the Don-Jo PB74545 is not the right class?
The Don-Jo PB74545 is a plain bearing hinge for medium weight doors in low-frequency use, which is not a detention application. The BEST BB855 is a heavy-duty steel double weight concealed ball bearing prison hinge in the detention hardware series, the Stanley Security BB855 is a double weight prison hinge at 5 inch by 6 inch furnished with no holes and not swaged, and the Hager 990 STEEL is a full surface prison hinge at 3 inch by 4 inch with a welded tip in heavy duty. These carry different preps entirely from a 4-1/2 inch full mortise.
21) Do Delaney residential hinges work in place of the Don-Jo PB74545?
They serve a different door. The Delaney RH35xx is a 3-1/2 inch by 3-1/2 inch bulk steel interior residential hinge with a 5/8 inch radius sold as a pair, the RH45xx is the 4 inch by 4 inch bulk exterior residential hinge with the same 5/8 inch radius, and the Delaney CH401X is a 4 inch by 4 inch commercial ball bearing hinge with square corners. The Don-Jo PB74545 is a commercial plain bearing hinge at 4.5 inch by 4.5 inch, so none of the three matches both the size and the corner profile of a 4-1/2 inch square commercial prep.
22) Is the Don-Jo PB74545 a residential hinge or a commercial one?
Commercial. The PB74545 is a steel full mortise hinge at 0.134 gauge carrying an ANSI A8133 designation, used in offices, schools, healthcare, retail, warehouses, multi-tenant residential, and municipal buildings. For a house, a lighter 3-1/2 inch residential hinge like the Emtek 91013 residential plain bearing pair or the Schlage S3P1010 3-1/2 x 3-1/2 square corner plain bearing pack of 3 is the correct size, since residential door preps are usually 3-1/2 inch, not 4-1/2.
23) How does the McKinney MacPro MP79 compare with the Don-Jo PB74545 for a standard weight commercial door?
The McKinney MP79 MacPro is a full mortise 5-knuckle standard weight hinge and the McKinney MPB79 MacPro is the 5-knuckle standard weight MacPro hinge as well, both rated standard duty. The Don-Jo PB74545 is a full mortise plain bearing hinge at 4.5 inch by 4.5 inch built to ANSI A8133 and template compatible, intended for medium weight doors in low-frequency use. All are full mortise commercial-style hinges, so the decision comes down to knuckle count and the weight class the door falls in.
24) What 4-1/2 inch hinge has a decorative barrel instead of the plain commercial barrel on the Don-Jo PB74545?
The McKinney SQ3331 is a square barrel 2-knuckle decorative hinge at 4-1/2 inch by 4-1/2 inch, rated standard duty. It matches the 4.5 inch by 4.5 inch size of the Don-Jo PB74545 but presents a square barrel with two knuckles, where the PB74545 is a plain bearing commercial hinge for medium weight doors. Choose by how visible the barrel is on the opening.
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Does the Don-Jo PB74545-652 come with a warranty?
Absolutely. The Don-Jo PB74545-652 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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