Medeco 54615 Indoor/Outdoor Hi...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$269.34
Medeco Medeco Indoor/Outdoor Padlock, M3 Technology, 6 Pin, 5/16" Shackle LFIC Med-54615

Medeco 54615 Indoor/Outdoor High Security Padlock M3 Technology 6 Pin 5/16" Shackle LFIC

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Model: 5461500
$269.34
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$269.34
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Medeco 54615 Indoor/Outdoor High Security Padlock — M3 Technology, 6 Pin, 5/16" Shackle LFIC

The Medeco System Series 54615 Indoor/Outdoor Padlock delivers a high-security locking solution engineered for demanding commercial applications where key control and physical attack resistance are paramount. Featuring M3 cylinder technology with a 6-pin configuration and a 5/16" diameter boron alloy steel shackle, this padlock is built to resist cutting, pulling, drilling, and picking. The weather-resistant indoor/outdoor body design ensures reliable performance across a wide range of environments, while hardened stainless steel cylinder inserts and a patented elevating and rotating tumbler pin system provide multi-layered protection against physical and covert attacks.

Key Features

  • 5/16" Boron Alloy Steel Shackle: The 5/16" diameter shackle is constructed from boron alloy steel, providing exceptional resistance to cutting and pulling attacks while maintaining ductility to prevent brittleness under stress.
  • Hardened Stainless Steel Cylinder Inserts: Internal hardened stainless steel inserts deliver the ultimate defense against drilling and other forms of physical vandal attack, protecting cylinder integrity under extreme force.
  • 6-Pin M3 High Security Cylinder: The 6-pin M3 cylinder technology features a unique elevating and rotating tumbler pin system that is virtually pick-proof, providing superior covert attack resistance.
  • Patented 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 and maintaining system integrity.
  • Shuttle Pin Anti-3D Printing Protection: The Medeco 4 (M4) design includes a Shuttle Pin movable element in the key, providing utility patent protection and resistance against 3D-printed key duplication attempts.
  • Flexible Keying Options: Padlocks can be ordered keyed alike, keyed differently, or master keyed to integrate seamlessly with existing door hardware systems for comprehensive key management.
  • Durable Machined Brass Cylinder Components: All Medeco cylinders are constructed of durable machined brass components, designed to last the life of the equipment in commercial-grade installations.
  • Indoor/Outdoor Weather-Resistant Design: The weather-resistant body is engineered for reliable performance in both indoor and outdoor environments, with extended shackle options available for indoor/outdoor models.
  • Key Retaining Options: Available as key retaining or non-key retaining configurations to suit specific operational and security requirements.

Certifications & Compliance

  • Commercial Grade Application
  • Patented M4 Key Duplication Control — Authorized Medeco Service Outlets Only
  • Utility Patent Protection (Medeco 4 Design)

Technical Specifications

  • Series: Medeco System Series Padlock
  • Cylinder Technology: Medeco M3
  • Pinning: 6-Pin
  • Shackle Diameter: 5/16"
  • Shackle Material: Boron alloy steel (cutting and pulling resistant)
  • Body Style: Indoor/Outdoor Weather-Resistant
  • 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
  • Educational Facilities and School Districts
  • Healthcare Institutions and Medical Facilities
  • Industrial and Warehouse Facilities
  • Government and Municipal Buildings
  • Utility and Infrastructure Access Points
  • Retail Establishments and High-Value Storage Areas

Why Medeco?

Medeco System Series padlocks are engineered with durable machined brass cylinder components, hardened stainless steel inserts, and a boron alloy steel shackle rated to resist cutting, pulling, and drilling attacks. The patented M3 and M4 cylinder technologies, combined with the elevating and rotating tumbler pin system, deliver professional-grade security trusted in the most demanding commercial environments where key control and physical attack resistance are non-negotiable.

Manufacturer Resources

Medeco Product Catalog

Product Specs

Product Group:
Other / Miscellaneous Hardware
Product Subgroup:
Padlocks
Product Type:
Padlocks
Subcategory:
Padlocks
Commercial/Residential:
Commercial
Shackle Diameter:
5/16" Diameter
Cylinder and Keyways:
6Pin
Series:
System Series
Product Lockbody Color:
Black
Product Category:
Other / Miscellaneous Hardware
Product Substrate:
Stainless Steel
Department:
Door Hardware

Medeco 5461500 – Frequently Asked Questions

1) Can the Medeco 54615 padlock be keyed into the same system as our building doors?
Yes. The 54615 takes an interchangeable core, so it drops into an existing Medeco small format core system and carries the same key as the doors. It can be ordered keyed alike across a group of padlocks, keyed different so each one stands alone, or master keyed under an existing top level key. That is the usual reason a facility buys this over a hardware store padlock: one key ring for doors, gates, and cabinets.
2) Is the Medeco 54615 padlock UL listed?
UL 437 Listed, which is the standard covering key locks tested for resistance to drilling, picking, and forced entry. Along with that, the 6-pin M3 cylinder uses an elevating and rotating tumbler pin system, and hardened stainless steel inserts sit inside the cylinder against drill attack. For a facility that has to document its high security hardware, the UL 437 listing is the line that matters on a submittal.
3) Can anyone copy the key for a Medeco 54615 padlock at a hardware store?
No. The patented M4 keys can only be cut by Medeco or an authorized Medeco service outlet, and only when the registered owner asks for it. The key also carries a Shuttle Pin movable element, which blocks 3D printed key copies from working. If your problem is not the padlock getting cut but keys quietly multiplying among contractors and former staff, that key control is what you are actually buying here.
4) I need padlocks for lockout tagout, is the Medeco 54615 the right one?
No, use a safety padlock instead. The 54615 is a high security commercial padlock built around key control and attack resistance, with a steel shackle and a metal body. Lockout tagout wants a lightweight, non-conductive, brightly finished lock. The ABUS 74/40 is an insulated safety padlock with a 6-pin cylinder, 1/4 inch shackle diameter and 1-1/2 inch body width, and the ABUS 76/40 is a plastic covered aluminum core padlock with a 1/4 inch shackle and 1-37/64 inch width. The ABUS 72/30 anodized aluminum safety padlock runs a 1-1/4 inch body and 3/16 inch shackle for smaller devices.
5) We already run Medeco cylinders in our building. Can a locksmith swap the core in this padlock to match?
That is exactly what the 54615 is for. It is an LFIC padlock, so the core lifts out with a control key and any Medeco small format core from your existing system goes in. A locksmith can bring it onto your master key schedule without touching the padlock body, and the same core can be pulled and rotated later when you turn over a tenant or a contractor. The cylinder is 6-pin M3 with the elevating and rotating tumbler pin design.
6) What padlock should I use instead of the Medeco 54615 for lockout tagout on an electrical panel?
Reach for a safety padlock rather than a high security one. The ABUS 72/30 is an anodized aluminum safety padlock with a 1-1/4 inch body width and a 3/16 inch shackle diameter, and the ABUS 74/40 is an insulated safety padlock with a 6-pin cylinder, a 1/4 inch shackle diameter and a 1-1/2 inch body width. Those are built for personnel isolation, where the lock is a warning and a procedural hold. The Medeco 54615 is a 6-pin M3 high security padlock with a 5/16 inch boron alloy steel shackle aimed at resisting cutting, pulling and drilling attacks on a secured asset. Different job, different lock.
7) Which high security padlock competes with the Medeco 54615 on key control?
The Sargent 82-856 in the KESO Series is the peer in that conversation. It is a non-key retaining padlock with a 2 inch by 2 inch brass case and a stainless steel shackle, running a KESO cylinder rather than a conventional pin tumbler. The Medeco 54615 uses a 6-pin M3 cylinder with an elevating and rotating tumbler pin system and patented key duplication restricted to Medeco and authorized service outlets. Both are the answer to the same question about who can cut a copy of the key; they get there through different cylinder designs, so the choice usually follows whichever system the site already administers.
8) Can I key an ABUS 74/40 into the same master key system as a Medeco 54615?
Plan on keying them separately. The Medeco 54615 takes a 6-pin M3 cylinder and can be ordered keyed alike, keyed differently or master keyed into an existing Medeco system, and it accepts a large format interchangeable core. The ABUS 74/40 is an insulated safety padlock with its own 6-pin cylinder, and the ABUS 72/30, 76/40 and T84MB/30 are likewise ABUS cylinder platforms. Matching pin counts does not make two keyways interchangeable. If one key has to open everything on the site, standardize on the Medeco cylinder platform across the padlocks and the door hardware.
9) Will a Medeco padlock hold up outdoors on a gate or a rooftop enclosure?
The 54615 body is built weather resistant for indoor or outdoor use, with a black lock body, stainless steel construction, and machined brass cylinder components. That is the configuration for exterior gates, utility and infrastructure access points, and rooftop or yard enclosures where the lock sits in the weather year round.
10) What is the difference between the Medeco 54615 and a Sargent removable core padlock?
Both are interchangeable core padlocks that key into a facility system, so the choice comes down to the cylinder platform your building already runs. The 54615 uses the Medeco 6-pin M3 cylinder with patented restricted key duplication and a 5/16 inch boron alloy steel shackle. The Sargent 60-858-2 is a removable core padlock with a 2 inch stainless steel shackle, and the Sargent 82-856 is a non-key retaining padlock with a 2 by 2 inch brass case and stainless steel shackle. Pick the brand whose cores are already in your doors, otherwise you end up carrying two key systems.
11) Is a 5/16 inch shackle thick enough to stop bolt cutters on a gate?
The 5/16 inch shackle on the 54615 is boron alloy steel rather than plain hardened steel, which keeps ductility so it resists pulling and cutting without going brittle. That is a meaningful step up from the thinner shackles on general purpose padlocks. For comparison inside the same class, the Schlage KS23D/KS23F brass padlock also runs a 5/16 inch diameter shackle. If the gate is genuinely exposed and unattended, pair whichever lock you choose with a shrouded hasp so the cutter cannot get jaws on the shackle at all.
12) Is the Schlage KS23D the same thing as the Medeco 54615 padlock?
They share a shackle diameter and little else. The Schlage KS23D/KS23F is a brass padlock with a 5/16 inch diameter shackle in the Schlage 20 Series. The Medeco 54615 also uses a 5/16 inch shackle, but in boron alloy steel, with a 6-pin M3 cylinder, hardened stainless steel cylinder inserts and a weather resistant indoor/outdoor body. If a hasp is already drilled for a 5/16 inch shackle either will pass through it; the security level and the keyway behind it are not the same decision.
13) What is a simpler alternative to the Medeco 54615 for a storage cage that does not need patented key control?
The Sargent 758 is a key retaining standard padlock in a US4 satin brass finish, and the Sargent 858 is the non-key retaining version with a stainless steel shackle in the same US4 satin brass. Both cover the same key retaining choice the Medeco 54615 offers, without the patented M3 key control and boron alloy shackle. Choose key retaining when you want the key trapped in the lock while the hasp is open so it cannot walk off with the crew.
14) What padlock holds up better than the Medeco 54615 against salt spray on a marina gate?
For a shoreline gate, look at the ABUS T84MB/30 Nautic, a black sleeve padlock with a 13/64 inch shackle diameter and a 1-17/64 inch body width, sold in a three pack. It is built for marine exposure. The ABUS 76/40 is a plastic covered aluminum core padlock with a 1/4 inch shackle diameter and a 1-37/64 inch width, where the covering guards the body and the surface it sits against. The Medeco 54615 is a weather resistant indoor/outdoor body with a 5/16 inch shackle, which is the heavier shackle of the three but is aimed at attack resistance rather than constant salt exposure.
How fast can I get the Medeco 5461500 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 Medeco 5461500 come with a warranty?
Absolutely. The Medeco 5461500 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 5461500?
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 Medeco 5461500 from ZenSupply?
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