Pemko Markar HM304 Series Half...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$805.00
$800.86
Pemko Markar HM304 Series Half Mortise Continuous Hinge with 600 lb Weight Capacity and 304 Stainless Steel Construction

Pemko Markar HM304 Series Half Mortise Continuous Hinge with 600 lb Weight Capacity and 304 Stainless Steel Construction

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Model: HM-304 6FT 8IN SS
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$805.00
$800.86
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Pemko Markar HM304 Series Half Mortise Continuous Hinge with 600 lb Weight Capacity and 304 Stainless Steel Construction

Professional Door Repair and Retrofit Solution

The Pemko Markar HM304 Series Half Mortise Continuous Pin and Barrel Hinge is engineered to repair wooden doors that have split or suffered damage from traffic abuse. This Grade 1 continuous hinge supports up to 600 lbs with a maximum door width of 4"; and accommodates door thickness from 1-3/4"; to 2-1/4";. Constructed with 304 stainless steel and featuring an extruded aluminum cover, this hinge provides reliable performance for demanding commercial applications with fire ratings up to 3 hours.

Professional Features & Benefits

  • Door Thickness Compatibility: Accommodates door thickness from 1-3/4"; to 2-1/4"; with maximum door width of 4"; for versatile installation options.
  • Heavy-Duty Weight Capacity: Supports up to 600 lbs for robust commercial door applications requiring exceptional load-bearing performance.
  • Durable Construction: 304 stainless steel hinge material with extruded aluminum cover provides exceptional corrosion resistance and longevity in demanding environments.
  • Fire Rating Compliance: UL 10C listed with fire ratings up to and including 3 hours for code compliance in fire-rated assemblies.
  • Door Repair Capability: Specifically designed to repair wooden doors that have split or are chipped and dented from traffic abuse without extensive modifications.
  • Easy Retrofit Installation: Surface mounted frame leaf design allows for simple installation without extensive door preparation or modifications to existing openings.
  • Reversible Door Swing: Can be used to reverse the handing or swing of the door without any modifications to the existing door structure.
  • Security Features: Concealed fasteners when door is closed and tamper-proof security screws available for enhanced security applications.

Technical Specifications

  • Department: Door Hardware
  • Grade: Grade 1
  • Product Category: Door Hinges and Pivots
  • Product Group: Door Hinges and Pivots
  • Product Model: HM304
  • Product Subgroup: Continuous Hinges
  • Product Substrate: Aluminum
  • Product Type: Continuous Hinges
  • Series: HM304 Series
  • Subcategory: Continuous Hinges

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 Pemko Quality?

Pemko Markar HM304 Series continuous hinges deliver professional-grade reliability with 304 stainless steel construction and Grade 1 BHMA certification. UL 10C listed with fire ratings up to 3 hours and Warnock Hersey listing ensure code compliance for demanding commercial applications. Engineered for demanding commercial applications where dependable performance and door repair capability are essential.

Product Specs

Subcategory:
Continuous Hinges
Grade:
Grade 1
Product Group:
Door Hinges and Pivots
Product Subgroup:
Continuous Hinges
Product Type:
Continuous Hinges
Product Model:
HM304
Product Category:
Door Hinges and Pivots
Department:
Door Hardware
Product Substrate:
Aluminum
Series:
HM304 Series

Pemko HM-304 6FT 8IN SS – Frequently Asked Questions

1) Will the Pemko Markar HM304 continuous hinge work on a 2-inch thick wood door?
Yes. The HM304 half mortise continuous hinge covers door thickness from 1-3/4 inches through 2-1/4 inches, so a 2 inch door is in range. There is also a maximum door width of 4 inches stated for the hinge. Standard 1-3/4 inch commercial doors are covered at the low end of that range.
2) Can I use a continuous hinge to save a wood door that has split at the hinge edge instead of replacing the door?
That is exactly what the HM304 half mortise hinge is built for. It spans the full hinge edge and is intended to repair wooden doors that have split or been chipped and dented by traffic abuse. The frame leaf is surface mounted, so you install it without extensive door prep or reworking the existing opening. For a property manager with a beat up corridor door, it is a repair rather than a door replacement.
3) Is the Pemko HM304 hinge fire rated, and for how long?
The HM304 is UL 10C listed with fire ratings up to and including 3 hours, and it also carries a Warnock Hersey listing. That covers it for fire rated assemblies up through 3 hour openings, which is more than the 90 minute ceiling on many geared continuous hinges.
4) What length continuous hinge do I order for a 7-foot door?
Order the 7 foot size. The HM304 comes in 6'8", 7', 7'2", 8' and 10' lengths, all in satin stainless steel, so match the hinge length to the door height. The 10 foot size covers tall openings without splicing.
5) What is the difference between a half mortise continuous hinge and a full mortise or full surface one?
Half mortise means one leaf mortises into the door edge while the frame leaf surface mounts to the face of the frame, which is why the HM304 goes onto an existing opening without reworking the frame. Full mortise types, like the BEST 641 and 651 or the Design Hardware FMHD, mortise into both the door and the frame and suit new prep or factory prepped openings. Full surface types such as the Design Hardware FSHD or BEST 664HD mount to the faces of both door and frame, which is the choice when neither member can be mortised.
6) What is the closest equivalent to the Pemko Markar HM304 half mortise continuous hinge from another brand?
The HM304 is a half mortise pin and barrel continuous hinge in 304 stainless steel, rated to 600 lbs with UL 10C fire ratings up to 3 hours. The nearest mounting cousins in other lines are half-mount geared hinges: the ABH A460HD is a heavy duty aluminum continuous gear hinge in a half surface configuration rated to 450 lbs, and the NGP HD5400A is a half surface continuous geared hinge in aluminum alloy, 10C fire rated 90 minutes on hollow metal. Both differ from the HM304 in two ways that matter on the opening: they are geared aluminum rather than stainless pin and barrel, and they mount half surface rather than half mortise, so the frame leaf lands on the face of the frame instead of into it. If the reason you are specifying the HM304 is the 3 hour rating or the stainless barrel construction, those peers do not match it.
7) The frame on my opening is already mortised for a continuous hinge - is the Pemko HM304 the right choice or should I use a full mortise hinge?
The HM304 is a half mortise hinge: the door leaf mortises in and the frame leaf mounts to the surface of the frame, which is what makes it a retrofit for split or traffic damaged wood doors without extensive prep. If both frame and door are already prepped for a fully concealed hinge, a full mortise model fits that prep better - the Design Hardware FMHD is a full mortise heavy duty continuous geared hinge, the ABH A120HD is a full mortise aluminum gear hinge, and the BEST 641 in steel and BEST 651 in stainless steel are full mortise continuous hinges with hospital tips. The BEST 641 and 651 are medium duty, while the FMHD is heavy duty.
8) My opening needs a hinge taller than 83 inches - what are my options?
The Pemko Markar HM304 is stocked in 6 ft 8 in, 7 ft, 7 ft 2 in, 8 ft and 10 ft lengths in satin stainless steel, so it covers tall and oversized openings up to a full 10 feet. Several of the geared alternatives are supplied at a fixed 83 inch length, including the NGP HD1100A concealed hinge, the NGP HD5400A half surface hinge and the NGP HD5700 full surface hinge, which suits a standard 7 ft door. For a 8 ft or 10 ft leaf the HM304 length range is the direct fit.
9) Can I reverse the swing of a door with the Pemko HM304 hinge?
Yes. The HM304 can be used to reverse the handing or swing of a door with no modification to the existing door. That makes it a way to change a door's swing direction during a retrofit rather than hanging a new door.
10) Is a continuous hinge like this secure enough for an exterior or tenant entry door?
The HM304 conceals its fasteners when the door is closed, and tamper proof security screws are available for higher security openings. Materials help too: the hinge is 304 stainless steel with an extruded aluminum cover, which holds up to corrosion better than plated steel on exposed openings.
11) Is the HM304 a geared continuous hinge or a pin and barrel type?
Pin and barrel. The Markar HM304 is a pin and barrel continuous hinge, not a geared one. Geared alternatives include the ABH A120HD and A135HD aluminum hinges and the Design Hardware FMHD and FSHD lines. If a spec or an existing opening calls out geared specifically, the HM304 is not the match.
12) The door and frame on my opening are both chewed up - is the Pemko HM304 still the answer or do I need a fully surface mounted hinge?
The HM304 mortises into the door edge, so it needs a door edge sound enough to take that prep; its strength is repairing doors that have split or been chipped and dented from traffic abuse. When neither leaf can be mortised, a full surface hinge that applies to the faces of both door and frame is the better call - the Design Hardware FSHD is a full surface heavy duty continuous geared hinge, the BEST 664HD is a full surface geared hinge, and the NGP HD5700 is a full surface continuous geared hinge with 1/16 inch door inset for 1-3/4 inch to 2-1/4 inch doors, the same door thickness range the HM304 covers.
13) How does the Pemko HM304 compare to the NGP HD1100A on grade?
The Pemko Markar HM304 carries a Grade 1 rating. The NGP HD1100A concealed continuous geared hinge is listed as Grade 3. They also differ in mounting and material: the HM304 is a half mortise 304 stainless steel pin and barrel hinge with an extruded aluminum cover, while the HD1100A is a concealed geared hinge supplied in an 83 inch length.
14) Is the BEST 651 stainless continuous hinge a substitute for the Pemko HM304?
They are not interchangeable at the opening. The BEST 651 is a stainless steel full mortise continuous hinge with hospital tips and is classed medium duty; it requires both the door edge and the frame rabbet to be mortised. The Pemko Markar HM304 is half mortise, meaning the frame leaf is surface mounted, and it is Grade 1 with a 600 lb capacity and fire ratings up to 3 hours. The two share the stainless material but not the prep or the duty classification, so swapping one for the other mid job usually means reworking the frame.
15) Is a geared continuous hinge like the BEST 663HD the same thing as the Pemko HM304?
No - they are two different hinge constructions that both run the full height of the door. The BEST 663HD is a heavy duty continuous geared hinge built for 3/32 inch inset doors and 90 minute UL fire rated. The Pemko Markar HM304 is a pin and barrel continuous hinge in 304 stainless steel with an extruded aluminum cover, half mortise mounted, with fasteners concealed when the door is closed and tamper resistant security screws available. Geared hinges use interlocking leaves over a bearing channel; pin and barrel hinges use a continuous knuckle and pin. Confirm which one the frame is prepped for before ordering.
16) What finish does the Pemko HM304 continuous hinge come in?
Satin stainless steel, across every length offered (6'8", 7', 7'2", 8' and 10'). If you are standardizing hinges across a building, every HM304 you order will match.
How fast can I get the Pemko HM-304 6FT 8IN SS 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 Pemko HM-304 6FT 8IN SS come with a warranty?
Absolutely. The Pemko HM-304 6FT 8IN SS 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 Pemko HM-304 6FT 8IN SS?
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 Pemko HM-304 6FT 8IN SS from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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