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Posted by National Lock Supply on Apr 17th 2026
A commercial door closer is the hydraulic device mounted to a commercial door that closes the door after every opening at a controlled speed. Its correct behavior is governed by two field adjustments (sweep speed and latch speed), one structural setting (spring size), and optionally a third valve (backcheck) on heavy-duty models. When a closer slams, fails to latch, or leaves the door ajar, the fix is almost always an adjustment — not a rep… Read more
Posted by National Lock Supply on Apr 16th 2026
The Adams Rite MS1850 and MS1890 are the two heavy-duty narrow-stile deadlocks specified for aluminum storefront doors across North American commercial construction. Both are ANSI/BHMA Grade 1, both mount into a narrow aluminum stile, and both are engineered for the specific physics of a storefront door — thin metal frame, tight backset, full-glass lite. They differ in bolt geometry and backset, and those two differences drive the correct s… Read more
Posted by National Lock Supply on Apr 15th 2026
A high-security lock cylinder is a drop-in cylinder replacement that upgrades a commercial lock body with pick resistance, drill resistance, and restricted key-control — without replacing the lock body itself. The three brands that dominate the U.S. high-security cylinder market are Medeco (ASSA ABLOY), Mul-T-Lock (ASSA ABLOY), and ASSA (also ASSA ABLOY, same parent company, different product line). All three carry UL 437 listing for attack… Read more
Posted by National Lock Supply on Apr 14th 2026
A panic bar for a glass storefront door or gate is an exit device engineered for two opening types that are structurally different from the hollow-metal doors most panic hardware is designed for: narrow-stile aluminum storefront with full-glass lites and exterior gates at assembly venues, stadiums, parks, and industrial yards. These openings have thinner stiles, no door coordinators, different strike geometries, and — in the case of gates &… Read more
Posted by National Lock Supply on Apr 13th 2026
A commercial mortise lockset is a Grade 1 lock installed inside a pocket (mortise) cut into the edge of the door. It is the highest-security and most durable mechanical lock format in ANSI/BHMA A156.13, and it is the default specification for exterior entries, public-building interior doors, and any opening where a cylindrical lock will not survive the cycle count. The three models that dominate U.S. commercial mortise specification are the Schla… Read more
Posted by National Lock Supply on Apr 10th 2026
A commercial door hinge is the structural pivot that carries a commercial door’s weight, cycles it tens of thousands of times per year, and determines whether the lockset stays aligned with the strike. In the U.S. commercial market, four brands dominate full-mortise butt hinge specification: Hager, McKinney, Stanley, and Bommer. They are largely interchangeable on paper — all four meet ANSI/BHMA A156.1 — but they differ in beari… Read more
Posted by National Lock Supply on Apr 9th 2026
A commercial keypad lock is a standalone electronic or mechanical lock that opens on a numeric code entered at the door, without cylinder keys or a central access-control server. The three models that dominate this category in the U.S. are the Alarm Lock Trilogy DL2700 (electronic, battery-powered, with audit trail), the Schlage FE595 (electronic, battery-powered, Grade 2 residential/light commercial), and the Kaba Simplex 1000 (fully mechanical,… Read more
Posted by National Lock Supply on Apr 8th 2026
The HES 1006, HES 9600, and HES 5000 are the three most specified electric strikes in North American commercial access control. All three are manufactured by HES (Hanchett Entry Systems, an Assa Abloy company), all three are UL 1034 burglary-resistant listed, and all three handle 12 V or 24 V DC with field-selectable fail-safe / fail-secure operation. They are not interchangeable. Each one is engineered for a different frame type, latch type, and… Read more
Posted by National Lock Supply on Apr 7th 2026
The Von Duprin 99 and Von Duprin 98 are the two flagship heavy-duty panic exit devices in the Allegion catalog and the benchmark against which every competing crash bar is measured. They share an identical chassis, identical latch mechanism, identical UL 305 panic and UL 10C fire listing, and identical warranty. They differ in one thing only: the 99 uses a pushpad actuator, and the 98 uses a crossbar actuator. That single difference drives a hand… Read more
Posted by National Lock Supply on Apr 6th 2026
The LCN 4040XP and the Norton 7500 are the two surface-mounted heavy-duty door closers most often specified for high-traffic commercial doors in the United States. Both are ANSI/BHMA Grade 1 closers built for exterior and high-cycle interior openings, but they differ in cycle life, arm flexibility, price tier, and parts availability. This guide compares them on every attribute that matters for a purchase decision.
If you still haven’t decid… Read more
Posted by National Lock Supply on Apr 3rd 2026
Multi-family door hardware is the category of commercial-grade hardware specified for apartment buildings, condominiums, and other residential structures containing multiple dwelling units that fall under the International Building Code (IBC) rather than the International Residential Code (IRC). This distinction is important because IBC requires commercial-grade fire-rated assemblies, panic hardware on egress doors, and ADA-compliant hardware on… Read more
Posted by National Lock Supply on Apr 3rd 2026
Industrial and warehouse door hardware is the category of commercial hardware specified for manufacturing plants, distribution centers, logistics facilities, food processing plants, and other high-cycle, high-abuse environments. It is defined by its emphasis on maximum duty cycle ratings, resistance to physical impact, and performance under harsh conditions including temperature extremes, corrosive atmospheres, and constant exposure to heavy equi… Read more
Posted by National Lock Supply on Apr 3rd 2026
Retail and storefront door hardware is a specialized category of commercial hardware designed for two distinct environments within the same building: the customer-facing storefront (typically aluminum-framed glass doors where aesthetics and specialized frame compatibility are primary concerns) and the back-of-house (hollow metal doors in steel frames where security and code compliance take priority).
The defining characteristic of storefront hard… Read more
Posted by National Lock Supply on Apr 3rd 2026
Healthcare facility door hardware encompasses all locking devices, automatic operators, closers, hinges, and protective hardware specified for hospitals, outpatient clinics, surgical centers, and behavioral health facilities. It is distinguished from other commercial hardware categories by three concurrent requirements: infection control (minimizing touch points through automatic and hands-free operation), patient safety (including anti-ligature… Read more
Posted by National Lock Supply on Apr 3rd 2026
K-12 school door hardware is the category of commercial locksets, exit devices, closers, and access control products specified for educational facilities serving kindergarten through twelfth grade. It is defined by two competing requirements that must be satisfied simultaneously: lockdown security (the ability to secure classrooms instantly during an active threat) and egress safety (the ability for students and staff to evacuate freely at all ti… Read more
Posted by National Lock Supply on Apr 3rd 2026
Office building door hardware refers to the complete set of mechanical and electrified locking devices, closers, hinges, and protective accessories specified across all door openings in a commercial office environment. It includes everything from the main lobby entry through individual tenant suites, private offices, server rooms, stairwells, and parking access points.
Hardware specifications for office buildings are governed by the International… Read more
Posted by National Lock Supply on Mar 24th 2026
Every piece of hardware in a commercial door specification is constrained by the frame before a single product is selected. The frame determines which lock functions are physically possible, which hinge gauge is required, where the closer can mount, what strike dimensions the electric strike must match, and whether a cylindrical or mortise lockset is compatible with the existing door preparation. Selecting hardware without verifying frame type an… Read more
Posted by National Lock Supply on Mar 20th 2026
The most consequential decision in exit hardware specification is not brand, not finish, and not function. It is channel. The channel determines whether the device is mechanically compatible with the door, whether it latches at one point or two, whether the rods are visible on the door face, and whether installation requires standard surface mounting or door factory modification. Specifying a concealed vertical rod device on a solid core wood doo… Read more
Posted by National Lock Supply on Mar 17th 2026
A surface-mounted door closer does three things simultaneously: it controls the door, it announces its presence on the door face, and it defines the aesthetic of every opening it appears on. In standard commercial construction, this is acceptable. In historic buildings, high-end lobbies, glass-walled corridors, and architecturally significant spaces, a surface-mounted closer on every door is an aesthetic problem that no amount of finish coordinat… Read more
Posted by National Lock Supply on Mar 16th 2026
School door hardware specification has changed materially since 2012, and changed again after 2018 and 2022. Each legislative response to school security incidents produced new hardware requirements: lockdown functions that work from inside the room without opening the door, rated cycle counts for high-use applications, and classroom security certifications that did not exist in most hardware catalogs ten years ago. Specifying a classroom door wi… Read more
Posted by National Lock Supply on Mar 13th 2026
A master key system is a mechanical key control architecture in which a single key operates every lock in the system while individual change keys operate only specific locks. The value is access management: giving a maintenance technician or property manager access to every door in a building without distributing a separate key for each lock, while ensuring a tenant's change key works only their door. When designed correctly, rekeying after a per… Read more
Posted by National Lock Supply on Mar 11th 2026
ADA compliance in commercial door hardware is not a single standard applied uniformly to every door. It is a collection of specific requirements, each applying to a specific type of door in a specific context: operating force, hardware shape, mounting height, threshold height, and maneuvering clearance. ADA violations in commercial buildings are almost always specification failures, not installation failures. The wrong hardware type was chosen fo… Read more
Posted by National Lock Supply on Mar 9th 2026
When access control is added to an opening that already has a cylindrical lock prep, the standard 2-1/8-inch cross-bore and 1-inch edge bore found in virtually every commercial door built in the last fifty years, the obvious options are to add a maglock, replace the strike with an electric strike, or replace the entire lock body with an electrified cylindrical lock. Each controls the opening in a fundamentally different way. An electric strike co… Read more
Posted by National Lock Supply on Mar 5th 2026
An electric strike is the most installation-sensitive component in access control hardware. Unlike a magnetic lock where the worst specification error is a mounting bracket mismatch, an electric strike that is incompatible with the existing lock body requires frame modification to correct. The strike must match the lock type, the fail mode must match the application's code requirements, the voltage must match the power supply, and the faceplate m… Read more
Posted by National Lock Supply on Mar 3rd 2026
A magnetic lock is the only electrified locking device with no moving parts. No solenoid, no bolt, no keeper. Just an electromagnet bonded to a steel armature plate through electromagnetic attraction. That simplicity makes maglocks extremely reliable in high-cycle commercial applications, but it also means specification errors cannot be corrected in the field. The holding force is fixed. The mounting geometry is fixed. The fail mode is fixed at t… Read more
Posted by National Lock Supply on Mar 2nd 2026
A commercial door closer fails in three predictable ways: it slams, it does not latch, or it resists opening so strongly it creates an ADA violation. In each case the hardware itself is rarely defective. The specification was wrong. Size, arm configuration, grade, and backcheck interact as a system, and getting any one of them wrong produces a door that generates steady service calls with no obvious mechanical cause.
What a Commercial Door Closer… Read more
Posted by National Lock Supply on Feb 17th 2026
Storefront trim looks like a “feel” decision until you’re dealing with a door that cycles all day, gets pulled from every angle, and still has to operate cleanly at closing time. On narrow-stile aluminum doors, trim selection affects more than comfort—it influences durability, user behavior, and whether the opening stays reliable or becomes a steady source of service calls.
This guide compares paddle vs lever trim the way… Read more
Posted by National Lock Supply on Feb 17th 2026
Aluminum storefront doors look straightforward—until you’re the one responsible for the replacement. Narrow stiles limit what can physically fit, high traffic exposes weak choices fast, and “close enough” measurements often turn into returns, downtime, and a door that won’t secure the way it should at the end of the day. That’s why choosing between a deadlatch, a deadlock, or a flushbolt/flushlock isn’t j… Read more
Posted by National Lock Supply on Feb 16th 2026
Request-to-exit devices are one of those components you only notice when they’re missing—or when they’re chosen wrong. In a controlled-access opening, you need the secure side to release predictably for authorized egress without creating nuisance releases, unsafe workarounds, or “sometimes it works” behavior. That’s exactly what a REX device is for: it tells the system “someone is exiting” so the lo… Read more
Posted by National Lock Supply on Feb 13th 2026
Keyless entry sounds simple—until you’re the one responsible for making it work every day. The “right” solution isn’t just about convenience. It’s about how the door is used (public traffic vs staff-only), how access is managed (one code vs many users), what happens when power fails, and how much maintenance the site will actually tolerate. That’s why choosing between keypad and proximity entry is really… Read more
Posted by National Lock Supply on Feb 12th 2026
Most access control problems aren’t caused by the “big” components. The reader works. The lock works. The credentials scan. Then the door still behaves inconsistently: it buzzes, releases late, won’t hold, randomly drops during peak traffic, or becomes a troubleshooting magnet every few weeks. When that happens, the fix is rarely replacing the primary device—it’s adding the supporting parts that make the system… Read more
Posted by National Lock Supply on Feb 11th 2026
Access control hardware is only as reliable as the power behind it. A system can have the right lock, the right reader, and the right credentials—and still fail in the field because the power supply is undersized, wired poorly, or missing the basic protection and outputs the opening actually needs. Most “mystery issues” (buzzing, chatter, random releases, intermittent holds) trace back to power.
This guide is the practical way t… Read more
Posted by National Lock Supply on Feb 10th 2026
A latch guard (often called a latch protector) is one of the simplest upgrades you can make to stop a very specific kind of attack: prying the latch side of the door. If a tool can get into the gap between the door and frame, an attacker isn’t trying to “pick” the lock—they’re trying to reach the latch, manipulate the keeper area, or create enough flex to defeat the door’s latching point.
The good news is that… Read more
Posted by National Lock Supply on Feb 9th 2026
A wrap around door plate is one of those “small” upgrades that can save a job. When a commercial door has been slammed for years, drilled out, repaired badly, or forced at the lock edge, the problem usually isn’t the lock—it’s the door. You can install a brand-new lockset and still end up with wobble, misalignment, or a latch that never quite feels solid because the material around the prep is compromised.
The goal o… Read more
Posted by National Lock Supply on Feb 6th 2026
Exit door alarms sit at the intersection of two priorities that don’t always get along: life safety and loss prevention. You want emergency exits to work exactly as intended in an emergency—but you also want to stop “wrong door” usage, theft exits, and unauthorized departures that create real risk for retail, healthcare, schools, and secured facilities.
Choosing the right alarm is less about finding the loudest device and… Read more
Posted by National Lock Supply on Feb 5th 2026
Storefront lock problems don’t always mean the lock is bad. More often, the issue is a worn strike that isn’t catching, a missing spacer that’s throwing off alignment, or a cam that no longer connects the cylinder to the lock body the way it should. These are the small parts that make storefront hardware work—and when one fails, the whole door feels broken.
This guide covers the parts that storefront technicians order most… Read more
Posted by National Lock Supply on Jan 20th 2026
Lever door handles are one of the most widely specified hardware components in modern buildings, yet they’re often underestimated in terms of their impact on accessibility, durability, and code compliance. In commercial facilities especially, the choice of lever handle directly affects user safety, ADA compliance, maintenance costs, and overall door performance. From office buildings and healthcare facilities to schools and mixed-use proper… Read more
Posted by National Lock Supply on Jan 20th 2026
Bathroom door locks play a critical role in commercial buildings, balancing privacy, accessibility, durability, and code compliance. Unlike residential bathroom locks, commercial restroom locks must withstand heavy daily use, meet ADA requirements, and integrate seamlessly with the rest of the door hardware system. Poorly specified restroom locks often lead to user complaints, maintenance issues, and even failed inspections.
This guide explains h… Read more
Posted by National Lock Supply on Jan 19th 2026
Commercial push bar door locks, commonly known as panic hardware or exit devices, are essential life-safety components in commercial and institutional buildings. These devices are designed to allow occupants to exit quickly and safely during an emergency by simply pushing on a horizontal bar, without the need for keys, tools, or special knowledge. When improperly specified or installed, however, push bar door locks can lead to code violations, fa… Read more
Posted by National Lock Supply on Jan 19th 2026
Selecting commercial door stops for heavy doors may seem like a minor hardware decision, but in real-world commercial environments, it directly affects door longevity, wall protection, hardware performance, and safety. Heavy doors, especially those equipped with closers, exit devices, or electrified hardware, generate significant force when opened repeatedly. Without the correct door stop, that force transfers to hinges, frames, closers, and surr… Read more
![How to Choose the Right Commercial Door Hardware [Guide]](https://cdn11.bigcommerce.com/s-iqhkw55zf5/images/stencil/1030x680/uploaded_images/how-to-choose-commercial-door-hardware-1-.jpeg?t=1768900665 "How to Choose the Right Commercial Door Hardware [Guide]")
Posted by National Lock Supply on Jan 16th 2026
Choosing the right commercial door hardware starts long before selecting locks, closers, or exit devices. One of the most critical and often overlooked decisions is choosing a reputable hardware supplier with deep product knowledge, reliable inventory, and responsive customer support. Commercial door hardware directly affects life safety, security, code compliance, and daily building operations, so working with an experienced provider like Nation… Read more
Posted by National Lock Supply on Jan 16th 2026
Choosing a commercial smart or digital door lock is no longer just about convenience; it's about security, access control, auditability, and long-term scalability. In offices, healthcare facilities, multi-tenant buildings, and mixed-use properties, digital locks have become a core part of modern security strategies. However, selecting the wrong system can lead to integration problems, user frustration, and costly replacements.
As with any commerc… Read more
Posted by National Lock Supply on Jan 15th 2026
Flush bolts are a small but critical component in many commercial door systems, especially on pairs of doors where controlled latching, fire protection, and proper alignment are required. When incorrectly specified, flush bolts can cause doors to bind, fail inspections, or compromise both security and life safety. That's why choosing the right flush bolt is not just a detail; it's a system decision.
As with all commercial door hardware, proper fl… Read more
Posted by National Lock Supply on Jan 15th 2026
Exit devices are critical life-safety components in commercial buildings, but the exit device trim installed on the secure or exterior side of the door is just as important as the panic hardware itself. The trim determines how occupants, staff, or authorized users gain entry while still allowing immediate, code-compliant egress from the inside. Choosing the wrong trim function can lead to security vulnerabilities, failed inspections, or daily ope… Read more
Posted by National Lock Supply on Jan 14th 2026
Choosing the right commercial panic exit device is one of the most consequential decisions in any life-safety hardware specification. Panic exit devices are not simply door locks; they are regulated safety systems designed to perform reliably during emergencies when occupants may be under stress, visibility may be limited, and crowd pressure may be present. Selecting the wrong device, or specifying it without understanding its operational context… Read more
Posted by National Lock Supply on Jan 14th 2026
Commercial deadbolts remain one of the most trusted mechanical security solutions for protecting offices, retail spaces, healthcare facilities, and institutional buildings. While newer technologies like smart locks and access control systems continue to grow, a properly specified commercial deadbolt still provides reliable, code-compliant, and cost-effective security, especially for perimeter doors and controlled interior spaces.
As with any crit… Read more
Posted by National Lock Supply on Dec 19th 2025
Extended holiday closures create security vulnerabilities that year-round operations never experience. Buildings sit empty for days or weeks with no staff observing unauthorized access attempts, terminated employees retain keys providing access during periods with no witnesses, and contractors who completed work weeks earlier still possess keys with no immediate need compelling their return. These accumulated access risks transform the holiday pe… Read more
Posted by National Lock Supply on Dec 18th 2025
Electrified door hardware, including electric strikes, mag locks, electric exit devices, and access control readers, requires power and signal wiring between the door frame and door leaf. The power transfer method determines installation cost, long-term reliability, aesthetic appearance, and maintenance requirements. Three primary power transfer methods dominate commercial applications: electrified hinges with concealed wiring through the hinge b… Read more
Posted by National Lock Supply on Dec 17th 2025
Door handing determines hardware orientation, which side hinges mount on, which direction doors swing, and which face is interior versus exterior. Incorrect handing specifications result in locksets that install backwards with keying on the wrong side, closers mounted on improper door faces creating interference, panic bars that open in the wrong direction violating egress codes, and hinges delivered for the opposite side requiring returns and re… Read more
Posted by National Lock Supply on Dec 16th 2025
Commercial door thresholds create the critical weather seal, accessibility transition, and structural support at the base of exterior openings-yet they are frequently misspecified, incorrectly measured, or installed with fastener patterns that void weatherproofing warranties.Pemko commercial threshold line dominates institutional and commercial specifications due to proven weatherproofing performance exceeding ASTM E283 air infiltration standards… Read more