Medeco 54525 Indoor/Outdoor 6-...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$262.00
$188.51
Medeco 54525 Indoor/Outdoor 6-Pin Shrouded Padlock with 5/16" Shackle Diameter and 3/4" Shackle Clearance

Medeco 54525 Indoor/Outdoor 6-Pin Shrouded Padlock with 5/16" Shackle Diameter and 3/4" Shackle Clearance

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Model: 5452500-00P
$262.00
$188.51

In Stock (leaves warehouse same day if ordered before 3pm ET)

$262.00
$188.51
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Medeco 54525 Indoor/Outdoor 6-Pin Shrouded Padlock with 5/16" Shackle Diameter and 3/4" Shackle Clearance

The Medeco 54525 is a high-security System Series indoor/outdoor shrouded padlock engineered for demanding commercial applications where key control and physical attack resistance are paramount. Featuring a 5/16" shackle diameter, 3/4" shackle clearance, and a 7/8" shackle width, this 6-pin cylinder padlock is constructed with a boron alloy steel shackle that resists cutting and pulling attacks while maintaining exceptional ductility. The shrouded shackle design adds an additional layer of protection against bolt cutters and physical tampering, making it ideal for high-security indoor and outdoor environments. The black lockbody finish and hardened stainless steel cylinder inserts combine durability with a professional appearance suited for commercial use.

Key Features

  • Shrouded Shackle Protection: The shrouded shackle design provides extra shackle protection against cutting attacks, significantly reducing vulnerability to bolt cutters and physical tampering.
  • Boron Alloy Steel Shackle: Constructed from boron alloy steel with a 5/16" diameter and 3/4" clearance, the shackle resists cutting and pulling attacks while offering exceptional ductility to prevent brittleness.
  • 6-Pin High-Security Cylinder: Hardened stainless steel inserts inside the 6-pin cylinder provide the ultimate defense against drilling and other forms of physical attack.
  • Virtually Pick-Proof Tumbler System: A unique elevating and rotating tumbler pin system makes the lock virtually pick-proof for superior security performance.
  • Medeco M4 Key Control: Patented M4 keys may only be duplicated by Medeco or an authorized Medeco service outlet and only at the owner's request, preventing unauthorized key duplication including protection against 3D printing via the Shuttle Pin movable element.
  • Durable Machined Brass Cylinder Components: All Medeco cylinders are constructed of durable machined brass components, designed to last the life of the equipment.
  • Flexible Keying Options: Padlocks can be keyed alike, keyed differently, or master keyed with existing door hardware systems to accommodate complex key management requirements.
  • Available Shackle Configurations: Available in either a 5/16" or 7/16" shackle diameter; key retaining or non-key retaining options available; extended shackles available for indoor/outdoor models.

Certifications & Compliance

  • Commercial Grade — Rated for Commercial Applications
  • Patented Medeco M4 Key Control Technology — Utility Patent Protection Against Unauthorized Key Duplication

Technical Specifications

  • Series: Medeco System Series Padlock
  • Cylinder Technology: Medeco 4 (M4)
  • Pinning: 6-Pin
  • Shackle Diameter: 5/16"
  • Shackle Material: Boron alloy steel (cutting and pulling resistant)
  • Body Style: Shrouded
  • Certification: UL 437 Listed
  • Construction: Durable machined brass cylinder components; hardened stainless-steel cylinder inserts
  • Warranty: 2-year manufacturer's warranty

Typical Applications

  • Commercial Office Buildings and Corporate Campuses
  • Industrial and Warehouse Facilities
  • Educational Institutions and Campus Security
  • Healthcare Facilities and Sensitive Equipment Areas
  • Government and Municipal Buildings
  • Outdoor Storage Units and Equipment Enclosures
  • Retail Establishments and High-Value Asset Protection

Why Medeco?

Medeco System Series padlocks are engineered with hardened stainless steel cylinder inserts, boron alloy steel shackles, and patented M4 key control technology to deliver professional-grade security in the most demanding commercial environments. The combination of a virtually pick-proof elevating and rotating tumbler pin system with shrouded shackle construction ensures comprehensive protection against drilling, cutting, pulling, and unauthorized key duplication. For applications where high security and key control are non-negotiable, Medeco delivers a trusted, purpose-built solution.

Manufacturer Resources

Medeco Product Catalog

Product Specs

Product Group:
Other / Miscellaneous Hardware
Product Subgroup:
Padlocks
Product Type:
Padlocks
Subcategory:
Padlocks
Commercial/Residential:
Commercial
Series:
System Series
Shackle Width:
7/8"
Cylinder and Keyways:
6Pin
Product Lockbody Color:
Black
Product Shackle Length:
3/4"
Product Category:
Other / Miscellaneous Hardware
Product Substrate:
Stainless Steel
Department:
Door Hardware

Medeco 5452500-00P – Frequently Asked Questions

1) What size hasp or chain will the Medeco 54525 shrouded padlock actually fit through?
The 54525 gives you 3/4 inch of shackle clearance with a 5/16 inch diameter shackle and 7/8 inch of shackle width, so it takes a staple or chain link that fits inside a 3/4 inch by 7/8 inch opening. That is a deliberately tight window: the shroud wraps the shackle to keep bolt cutter jaws off it, and the tradeoff is less room to work with than an open shackle padlock. Measure the hasp staple and the link stock before ordering, because a heavy gate chain or an oversized weld-on staple will not pass through it. Medeco System Series padlocks are also built with a 7/16 inch shackle diameter and with extended shackles on indoor/outdoor models if you need more reach.
2) Can a Medeco 54525 padlock be keyed into the Medeco cylinders already in our building doors?
Yes. The 54525 padlock can be keyed alike, keyed differently, or master keyed into an existing Medeco door hardware system, so one facility key can run the doors and the padlocks together. The catch is the keyway and technology have to match what your building is already on. The 54525 is built in Original 00, Bilevel DL, M3 DL, Biaxial G3, and Keymark 8E. Pull one of your existing keys and read the technology and keyway off the bow or off your key records, then order the matching one. If you are starting a new system rather than extending an old one, order it sub-assembled and have your locksmith pin it to your bitting.
3) Is a shrouded padlock like the Medeco 54525 worth it over a standard open shackle padlock?
A shroud is about one attack: bolt cutters. The 54525 body rises up around the shackle so the jaws cannot get a bite on it, and the 5/16 inch shackle itself is boron alloy steel, which resists cutting and pulling and stays ductile rather than going brittle. If your exposure is an outdoor gate, a yard enclosure or a trailer where someone can stand at the lock with a tool, that is the case for a shroud. If the padlock lives on an interior cabinet or a locker and your real concern is key control rather than a physical attack, an open shackle padlock is easier to use through a hasp and costs you nothing in security you actually needed. For a locker or lockout application specifically, look at the ABUS 72/30 anodized aluminum safety padlock or the insulated ABUS 74/40 instead.
4) Can our maintenance guys get copies of the Medeco padlock keys cut at a hardware store?
No, and that is the whole point of the 54525. The M4 keys are patent protected and can only be duplicated by Medeco or an authorized Medeco service outlet, and only at the owner's request. A hardware store or a kiosk cannot cut one, and the Shuttle Pin movable element in the key blocks a 3D printed copy from working. Plan for it: decide up front how many keys each site needs and who signs for a replacement, because getting one more later goes through the authorized channel, not through a big box store.
5) We need twenty padlocks that all open with the same key. Can we order the Medeco 54525 that way?
Yes. Keyed alike and keyed different are the two order options, so you can put all twenty on one key or give every lock its own. Keyed alike is the usual call for a fleet of identical enclosures worked by the same crew. Keyed different suits a run of tenant storage or evidence cabinets where each user gets only their own. If you want both, a single key that opens all twenty plus individual keys per lock, that is a master keyed system and the 54525 supports it against your existing Medeco door hardware.
6) What is the closest equivalent to the Medeco 54525 padlock if I need a removable core instead of a fixed cylinder?
The Medeco 54525 is a System Series shrouded padlock built around a fixed 6-pin high-security cylinder, ordered by keyway family (Original 00, Bilevel DL, Keymark 8E, M3 DL, or Biaxial G3). If the facility standardizes on interchangeable cores so a locksmith can rekey by swapping the core rather than repinning, the Sargent 60-858-2 removable core padlock with a 2 inch stainless steel shackle is the direct counterpart. The 60-858-2 belongs to Sargent's 758/858 series, so it shares the core platform used across those padlock bodies. Choose the 54525 when shrouded shackle protection and Medeco M4 key control drive the decision, and the 60-858-2 when core interchange with an existing Sargent system does.
7) Is the Schlage KS23D a drop-in replacement for a Medeco 54525?
They share a shackle diameter but not a body design. The Schlage KS23D/KS23F is a brass padlock with a 5/16 inch diameter shackle, matching the 5/16 inch shackle diameter of the Medeco 54525. The difference is the body: the 54525 is a shrouded design with a black lockbody, meaning the body wraps the shackle to limit bolt cutter access, while the Schlage KS23D/KS23F is a conventional brass body padlock in Schlage's 20 Series. If a hasp was cut for a shrouded body, the exposed shackle of the KS23D will latch fine but leaves more shackle standing proud. For a like-for-like swap on an existing shrouded application, stay with the 54525.
8) I need a padlock for lockout/tagout, not for security. Is the Medeco 54525 the wrong tool?
For lockout/tagout it is. The Medeco 54525 is a commercial high-security padlock with a boron alloy steel shackle and a shrouded body, engineered to resist cutting and drilling attacks; its 6-pin M4 cylinder is about key control, not worker identification. A safety padlock is built the opposite way, light and non-conductive so it is easy to carry and safe near energized equipment. The ABUS 72/30 anodized aluminum safety padlock has a 1-1/4 inch body width and a 3/16 inch shackle diameter, and the ABUS 74/40 insulated safety padlock uses a 6-pin cylinder with a 1/4 inch shackle diameter and 1-1/2 inch body width. Both are lighter shackles than the 5/16 inch on the 54525. Use the ABUS 72/30 or 74/40 for energy isolation and the 54525 where the padlock is the security barrier.
9) Our building is standardized on Sargent keying. Do we have to move to Medeco to get a key retaining padlock?
No. The Medeco 54525 is available in both key retaining and non-key retaining configurations, but if the facility keys to Sargent, the Sargent 758 is a key retaining standard padlock in a US4 satin brass finish and the Sargent 858 is the non-key retaining counterpart with a stainless steel shackle, also US4 satin brass. Key retaining means the key cannot be withdrawn while the shackle is open, which is what keeps keys from walking off at a gate. The reason to specify the 54525 instead is its shrouded body and 6-pin Medeco M4 cylinder with restricted key duplication; the reason to specify the Sargent 758 or 858 is keeping one key system across the facility.
10) Can I get a longer shackle than 2 inches in a high-security padlock, or do I need a different model than the Medeco 54525?
The Medeco 54525 carries a 3/4 inch shackle clearance, which is a short-clearance lock intended for tight hasps and shrouded protection rather than for reaching through a chain link or a thick staple. Where a longer reach is required and high security still applies, the Sargent 60-858-2 is specified with a 2 inch stainless steel shackle on a removable core body. Confirm the staple thickness plus the material being secured before ordering: if that stack exceeds 3/4 inch, the 54525 will not close and the longer-shackle Sargent 60-858-2 is the model to quote.
11) Should I order the Medeco 54525 key retaining or non-key retaining?
Key retaining means the key will not come out of the cylinder while the padlock is open, so the lock cannot be left hanging unlocked with the key in a pocket. That is the one to specify for tool cribs, utility enclosures and any application where an open padlock has to be closed back up before the key walks away. Non-key retaining lets you pull the key out with the shackle open, which is what you want when one person carries a single key and works a run of gates or cabinets. The 54525 is built both ways across all five keyways, so the choice does not restrict which technology you can order.
12) Will a Medeco 54525 padlock hold up mounted outdoors year round?
It is built as an indoor/outdoor padlock. The cylinder components are machined brass, the cylinder inserts are hardened stainless steel, and the lockbody carries a black finish. Boron alloy steel is the shackle material, which is chosen for cut and pull resistance. On a coastal or heavily salted site where corrosion is the governing concern rather than cutting, the 54525 is also built with a stainless steel shackle instead of the boron alloy, across every keyway and both key retaining options.
13) What is a good alternative to the Medeco 54525 if we run Sargent keyways instead?
Match the padlock to the system you already key, not the other way around. If your building is on Sargent, the Sargent 758 is the key retaining padlock and the 858 is the non-key retaining version, both with a stainless steel shackle, and the 60-858-2 is the removable core version with a 2 inch stainless steel shackle if you run SFIC and want to rekey by swapping cores. For Sargent KESO systems there is the 82-856, non-key retaining with a 2 by 2 inch brass case. None of those are shrouded the way the 54525 is, so if bolt cutter resistance is the driver, weigh that against the convenience of staying on one keyway.
14) Which padlocks look like a substitute for the Medeco 54525 but will not hold up on an exterior storage yard?
The lighter-shackle safety and sleeve models are the ones most often mistaken for a substitute. The ABUS 72/30 aluminum safety padlock uses a 3/16 inch shackle, the ABUS T84MB/30 Nautic a 13/64 inch shackle, and the ABUS 76/40 a 1/4 inch shackle on a plastic-covered aluminum core. Each is a smaller shackle section than the 5/16 inch boron alloy steel shackle on the Medeco 54525, and none is a shrouded design, so the full shackle is exposed at the hasp. For an exterior yard or equipment enclosure where a cutter can be brought to the lock, specify the 54525 in its shrouded configuration; reserve the ABUS models for indoor process, equipment identification, and finish-sensitive applications.
How fast can I get the Medeco 5452500-00P 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 Medeco 5452500-00P come with a warranty?
Absolutely. The Medeco 5452500-00P 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 Medeco 5452500-00P?
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