Medeco 5400 Indoor/Outdoor Hig...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$173.34
$65.53
Medeco Medeco Indoor/Outdoor Padlock, 5/16" Shackle SFIC 5400

Medeco 5400 Indoor/Outdoor High Security Padlock with 5/16" Boron Alloy Steel Shackle SFIC

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Model: 54315L0
$173.34
$65.53
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$173.34
$65.53
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Medeco 5400 Indoor/Outdoor High Security Padlock with 5/16" Boron Alloy Steel Shackle SFIC

The Medeco System Series 5400 Indoor/Outdoor Padlock delivers a high-security locking solution engineered for demanding commercial applications where key control and physical attack resistance are paramount. Featuring a boron alloy steel shackle available in 5/16" or 7/16" diameter, this padlock resists cutting and pulling attacks while maintaining exceptional ductility to prevent brittleness. The weather-resistant indoor/outdoor body design, combined with hardened stainless steel cylinder inserts and the patented Medeco 4 (M4) elevating and rotating tumbler pin system, provides comprehensive protection against drilling, picking, and unauthorized key duplication. Extended shackle options are available for indoor/outdoor models, and the lock can be ordered as key retaining or non-key retaining to suit specific operational requirements.

Key Features

  • Boron Alloy Steel Shackle: Available in 5/16" or 7/16" diameter, the boron alloy steel shackle provides superior resistance to cutting and pulling attacks while maintaining exceptional ductility — eliminating brittleness for long-term reliability.
  • 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.
  • Patented Medeco 4 (M4) Key Control: The M4 design provides utility patent protection against unauthorized key duplication. Keys may only be duplicated by Medeco or an authorized Medeco service outlet at the owner's request, maintaining strict system integrity.
  • Shuttle Pin Anti-3D-Print Technology: The Shuttle Pin movable element integrated into the M4 key provides active protection against 3D-printed key duplication attempts.
  • Virtually Pick-Proof Cylinder: The unique elevating and rotating tumbler pin system makes the cylinder virtually pick-proof, providing an advanced level of security beyond standard pin tumbler designs.
  • Durable Machined Brass Cylinder Components: All Medeco cylinders are constructed of durable machined brass, engineered to last the life of the equipment in continuous commercial use.
  • Flexible Keying Options: Padlocks can be ordered keyed alike, keyed differently, or master keyed to integrate seamlessly with existing door hardware systems and key management programs.
  • Key Retaining & Extended Shackle Options: Available as key retaining or non-key retaining; extended shackle lengths are available for indoor/outdoor models to accommodate a variety of hasp and chain configurations.
  • Intelligent Key Electronic Cylinder Compatibility: System Series padlocks can be ordered with Medeco 4 High Security or a variety of cylinder technologies including Intelligent Key electronic cylinders for advanced access control integration.

Certifications & Compliance

  • Commercial-Grade Security Hardware
  • Patented Medeco 4 (M4) Key Control — Utility Patent Protection Against Unauthorized Duplication
  • Patented Key Programs Maintain System Integrity

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: 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 Campus Facilities
  • Industrial and Warehouse Facilities Requiring High-Security Access Control
  • Educational Institutions with Key Control Requirements
  • Healthcare Facilities Securing Sensitive Areas and Equipment
  • Government and Municipal Buildings
  • Outdoor Infrastructure, Gates, and Equipment Enclosures
  • Multi-Tenant Properties with Master Key System Integration

Why Medeco?

Medeco System Series padlocks are engineered from durable machined brass cylinder components and boron alloy steel shackles, combining physical attack resistance with patented key control technology that prevents unauthorized duplication at every level. The M4 Shuttle Pin design and hardened stainless steel cylinder inserts make these padlocks a professional-grade choice for any application where security and key management integrity cannot be compromised.

Manufacturer Resources

Medeco Product Catalog

Product Specs

Product Group:
Other / Miscellaneous Hardware
Subcategory:
Padlocks
Product Subgroup:
Padlocks
Product Type:
Padlocks
Commercial/Residential:
Commercial
Product Category:
Other / Miscellaneous Hardware
Department:
Door Hardware

Medeco 54315L0 – Frequently Asked Questions

1) Should I order the Medeco 5400 padlock key retaining or non-key retaining?
Key retaining means the key cannot be pulled out while the padlock is open, so the lock cannot be left hanging unlocked with the key in someone's pocket. That is what you want on gates, equipment enclosures, and any spot where a padlock left open is a real exposure, and it is how most institutional key control programs spec it. Non-key retaining lets the key come out in either position, which suits a tech carrying one key across many locks who does not want to be tethered at each stop. The 5400 is built both ways, and the choice is made at order time, not in the field.
2) Can the Medeco 5400 padlock be master keyed into the key system already running my building?
Yes. The 5400 can be ordered keyed alike, keyed differently, or master keyed, so the padlocks on your gates and enclosures can sit under the same master as the door hardware in a Medeco M4 system. It uses the Medeco 4 elevating and rotating tumbler pin cylinder, so it keys into an M4 system, and the keying is set on the order. Keyway choices are DL and G3, and the keyway has to match the system you are joining, so give your locksmith or your Medeco outlet the existing keyway and the master key system number when you place it.
3) Can someone copy the key to a Medeco 5400 padlock at a hardware store?
No. The 5400 runs the patented Medeco 4 (M4) key, which carries utility patent protection against unauthorized duplication. Keys are only cut by Medeco or an authorized Medeco service outlet, and only at the owner's request, so a tenant or a departing employee cannot walk into a big box store and get a copy. The M4 key also carries the Shuttle Pin movable element, which defeats 3D-printed key duplication. For a property manager or an MRO buyer, that is the practical difference between this and a padlock whose key blank is on a rack anywhere.
4) What is the closest equivalent to a Medeco 5400 padlock from another manufacturer?
The Sargent 60-858-2 is the nearest peer: a removable core padlock with a 2 inch stainless steel shackle from the Sargent 758/858 series. Both are brass-bodied commercial padlocks built around an interchangeable core, so a facility running Sargent cores can key a 60-858-2 into an existing system the same way the Medeco 5400 takes an SFIC core with a DL or G3 keyway. The difference is in the shackle and the cylinder: the 5400 uses a 5/16 inch boron alloy steel shackle and the Medeco 4 elevating and rotating tumbler system with hardened stainless steel cylinder inserts and UL 437 listing, while the 60-858-2 shackle is stainless steel.
5) I need a key retaining padlock but do not need Medeco level key control. What else works?
The Sargent 758 is a key retaining standard padlock in a US4 satin brass finish, from the Sargent 758 series. Key retaining means the key cannot be withdrawn while the shackle is open, which is the behavior that keeps a padlock from walking off a gate or being left unlocked. The Medeco 5400 offers the same choice as an ordering option, key retaining or non-key retaining, in 6-pin and 7-pin, and adds the M4 patented key control that restricts duplication to Medeco or an authorized Medeco service outlet. If the requirement is only that the key stay captive, the 758 covers it; if the requirement includes controlled key duplication, that is the 5400.
6) Is an ABUS 72/30 safety padlock a substitute for a Medeco 5400?
No. The ABUS 72/30 is an anodized aluminum safety padlock in the ABUS 72 series, with a 1-1/4 inch body width and a 3/16 inch shackle diameter. Safety padlocks are lockout/tagout devices: the light aluminum body and thin shackle are deliberate, so the lock is easy to carry and easy to cut off in an emergency, and it identifies the worker who applied it. They are not built to resist attack. The Medeco 5400 is the opposite brief, a 5/16 inch boron alloy steel shackle chosen for cutting and pulling resistance with hardened stainless steel cylinder inserts against drilling. Use the 72/30 for energy isolation on equipment, the 5400 for securing a gate, enclosure, or storage that has to stay secured.
7) Will a Medeco 5400 padlock hold up outdoors on a gate or a utility enclosure?
It is built for it. The 5400 uses a weather-resistant indoor/outdoor body, a boron alloy steel shackle that resists cutting and pulling while staying ductile rather than brittle, and machined brass cylinder components. Hardened stainless steel inserts inside the cylinder are there for drill and vandal attack. That combination is what separates it from an indoor-only padlock on an exposed gate, fence line, or equipment cabinet.
8) Is the Medeco 5400 the right padlock for lockout tagout?
No, and this is the wrong tool for that job. The 5400 is a high security padlock built for key control and attack resistance, which is the opposite of what LOTO needs. For lockout tagout you want a nonconductive or color coded safety padlock: the ABUS 72/30 anodized aluminum safety padlock with a 1-1/4 inch body and 3/16 inch shackle, the insulated ABUS 74/40 with a 6-pin cylinder, 1/4 inch shackle and 1-1/2 inch body, or the plastic covered aluminum core ABUS 76/40 on a 1/4 inch shackle. Use the 5400 for gates, enclosures, and secured storage, not for energy isolation.
9) How hard is a Medeco 5400 padlock to pick or drill?
The cylinder uses an elevating and rotating tumbler pin system rather than a standard pin tumbler, which is what makes it virtually pick proof, and hardened stainless steel inserts sit inside the cylinder against drilling and other physical vandal attack. Cylinder components are machined brass. It is UL 437 Listed, which is the third party confirmation of that attack resistance rather than just a manufacturer claim.
10) What is the difference between a Medeco 5400 and a Sargent 82-856 padlock?
Both are high security commercial padlocks with a brass body. The Sargent 82-856 is non-key retaining with a 2 inch by 2 inch brass case and a stainless steel shackle, built on the Sargent KESO series cylinder platform. The Medeco 5400 is ordered either key retaining or non-key retaining and uses the Medeco 4 cylinder, whose elevating and rotating tumbler pins and Shuttle Pin movable element in the key resist picking and 3D printed key duplication. The shackles differ in material: boron alloy steel on the 5400 at 5/16 inch diameter, stainless steel on the 82-856. A buyer already standardized on KESO keying would stay with the 82-856; a buyer standardized on Medeco keyways would stay with the 5400.
11) What padlock should I use outdoors if the Medeco 5400 is more security than the application needs?
The ABUS 76/40 is a plastic-covered aluminum core padlock with a 1/4 inch shackle diameter and a 1-37/64 inch body width, from the ABUS 76 series. The plastic cover protects the finish of whatever the lock hangs against and shields the body from weather, which suits gates, lockers, and fencing where the exposure is the issue rather than attack resistance. The ABUS T84MB/30 Nautic, a black sleeve padlock with a 13/64 inch shackle diameter and 1-17/64 inch body width sold in threes, is built for marine and wet exposure at a smaller size. The Medeco 5400 is the choice when the outdoor opening also needs attack resistance and controlled key duplication: its weather-resistant indoor/outdoor body pairs with the boron alloy steel shackle and the M4 cylinder.
12) Can I get a Medeco 5400 padlock with an electronic cylinder instead of a mechanical key?
Medeco System Series padlocks can be ordered with the Medeco 4 High Security cylinder or with other cylinder technologies including Intelligent Key electronic cylinders. That matters if you are running audit trail or scheduled access on remote gates and cabinets where there is no power and no network, since the credential carries the intelligence rather than the lock. The cylinder technology is set at order, so specify it up front rather than planning to swap later.
How fast can I get the Medeco 54315L0 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 54315L0 come with a warranty?
Absolutely. The Medeco 54315L0 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 54315L0?
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 54315L0 from ZenSupply?
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