Medeco 5451500 Indoor/Outdoor ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$232.00
$168.25
Medeco 5451500 Indoor/Outdoor 6-Pin High Security Padlock with M4 Cylinder and 5/16" Boron Alloy Shackle

Medeco 5451500 Indoor/Outdoor 6-Pin High Security Padlock with M4 Cylinder and 5/16" Boron Alloy Shackle

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Model: 5451500-00P
$232.00
$168.25

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

$232.00
$168.25
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Medeco 5451500 Indoor/Outdoor 6-Pin High Security Padlock with M4 Cylinder and 5/16" Boron Alloy Shackle

The Medeco System Series 5451500 is a high-security indoor/outdoor padlock engineered with M3 and M4 cylinder technologies, a 6-pin rotating tumbler pin configuration, and a boron alloy steel shackle measuring 5/16" in diameter. Built with a machined brass body and hardened stainless steel inserts, this padlock delivers exceptional resistance to cutting, drilling, picking, and unauthorized key duplication. Available in 5/16" or 7/16" shackle diameters, the System Series is designed for demanding commercial and industrial environments where maximum physical security and strict key control are non-negotiable.

Key Features

  • M4 High-Security Cylinder: Medeco M4 cylinder with utility patent and 3D key duplication protection ensures only authorized Medeco service outlets can reproduce keys.
  • 6-Pin Rotating Tumbler System: Six-pin configuration with rotating tumbler pins provides virtually pick-proof performance against sophisticated bypass attempts.
  • Boron Alloy Steel Shackle: 5/16" diameter boron alloy shackle delivers superior tensile strength and ductility, resisting cutting, pulling, and twisting attacks.
  • Hardened Stainless Steel Inserts: Internal stainless steel inserts within the machined brass cylinder body defend against drilling and physical tampering.
  • Shrouded Shackle Option: Optional shrouded shackle configuration available for increased protection against bolt cutter and pry attacks.
  • Strict Key Control: Patented keys can only be duplicated by authorized Medeco service outlets at the owner's request, preventing unauthorized key copying.
  • Flexible Keying Options: Available keyed alike, keyed different, or master keyed to accommodate complex security hierarchies and large-scale deployments.
  • Medeco Intelligent Key Compatible: Available with Medeco Intelligent Key electronic cylinder technology and other advanced cylinder options for integrated access control.
  • Shackle Diameter Options: Choose from 5/16" or 7/16" shackle diameters, with extended shackle configurations offered for indoor/outdoor models.

Certifications & Compliance

  • M3 and M4 Cylinder Technology with Utility Patent Protection
  • 3D Key Duplication Protection — Authorized Medeco Service Outlets Only
  • Weather-Resistant Finish for Indoor and Outdoor Use

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

  • Outdoor Gates and Perimeter Fencing
  • Utility Enclosures and Industrial Equipment
  • Cargo Containers, Trailer Doors, and Storage Units
  • Retail Back-of-House and Stockroom Areas
  • High-Security Lockers and Commercial Buildings
  • Government and Municipal Facilities
  • Educational and Healthcare Institution Asset Protection

Why Medeco?

Medeco System Series padlocks are engineered with the same cylinder strength found in high-security deadbolts, combining a machined brass body, hardened stainless steel inserts, and boron alloy steel shackles to resist the most sophisticated physical attacks. The M4 cylinder's patented 3D key control technology and 6-pin rotating tumbler system make this padlock a professional-grade solution for any application where cut resistance, drill protection, and unauthorized key duplication prevention are critical requirements.

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
Tags:
medeco padlock, strongest combination padlock
Product Lockbody Color:
Black
Product Category:
Other / Miscellaneous Hardware
Product Substrate:
Stainless Steel
Department:
Door Hardware

Medeco 5451500-00P – Frequently Asked Questions

1) What makes this Medeco padlock different from standard padlocks?
This Medeco features a high-security 6-pin cylinder with unique angled cuts and rotating pins. Keys cannot be duplicated without authorization cards. The design resists picking, drilling, and bumping far better than conventional padlocks.
2) Is this padlock suitable for outdoor use?
Yes, this model is rated for both indoor and outdoor applications. The hardened steel shackle and body resist corrosion and weathering. The cylinder is designed to function reliably in various climate conditions.
3) What is the shackle clearance with a 5/16 inch diameter?
The 5/16 inch shackle diameter provides a good balance of strength and clearance for most applications. Verify your hasp or chain link opening accommodates this diameter. Check the specific shackle height and width dimensions for your installation requirements.
4) Can additional keys be made for this padlock?
Medeco keys require special authorization cards and can only be duplicated by authorized dealers. This prevents unauthorized key copying. Keep your authorization card secure and contact a Medeco dealer for additional keys.
5) What security grade does this padlock meet?
Medeco padlocks typically meet high-security standards for commercial and industrial use. The 6-pin cylinder and hardened components provide superior protection against common attack methods. Verify specific security ratings for your application requirements.
6) How do I maintain this padlock for long-term use?
Apply graphite lubricant to the keyway periodically. Avoid oil-based lubricants that attract dirt. Clean the body with mild soap and water. Exercise the lock regularly in outdoor installations to prevent binding from weather exposure.
7) Is this padlock rekeyable?
Medeco cylinders can typically be rekeyed by qualified locksmiths with proper equipment and authorization. This allows changing the key combination without replacing the entire padlock. Contact a Medeco dealer for rekeying services.
8) What applications work best with this padlock size?
This size works well for securing gates, storage containers, equipment trailers, and utility boxes. The 5/16 inch shackle fits most standard hasps and chain links. Consider larger shackles for thick gates or specialized applications.
9) Can this padlock be keyed alike with other Medeco locks?
Yes, Medeco locks can be keyed alike or arranged in master key systems when ordered together. This requires coordination during manufacturing or professional rekeying. Plan your keying requirements before ordering multiple locks.
10) How does the 6-pin cylinder compare to 5-pin versions?
The 6-pin cylinder provides additional security over 5-pin versions through more key combinations and increased pick resistance. The extra pin makes unauthorized entry more difficult while maintaining smooth operation with the proper key.
11) What should I do if the key becomes difficult to turn?
Apply graphite lubricant to the keyway and work the key gently. Avoid forcing the mechanism. If binding persists, the cylinder may need professional cleaning or adjustment. Contact a qualified locksmith familiar with Medeco locks.
How fast can I get the Medeco 5451500-00P 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 5451500-00P come with a warranty?
Absolutely. The Medeco 5451500-00P 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 5451500-00P?
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 5451500-00P 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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