BEST 21B Series Steel Shackle ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$96.00
$56.64
BEST Best 21B Series Steel Shackle Padlock 5/16" Diameter BES-21B72T

BEST 21B Series Steel Shackle Padlock with Removable Core - 5/16" Diameter

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Model: 21B72T
$96.00
$56.64

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

$96.00
$56.64
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BEST 21B Series Steel Shackle Padlock with Removable Core - 5/16" Diameter

Professional Interchangeable Core Padlock Solution

The BEST 21B Series Steel Shackle Padlock features a standard removable core that is interchangeable throughout most of the entire BEST product line. This 5/16" diameter steel shackle padlock with 7/8" shackle width provides professional security with the flexibility of immediate rekeying at minimal cost. The satin chromium plated finish and stainless steel construction deliver reliable performance for commercial applications.

Professional Features & Benefits

  • Interchangeable Core System: Standard removable core allows integration with BEST locks of any type, size or style for unified masterkey systems.
  • Steel Shackle Construction: 5/16" diameter steel shackle with 7/8" width provides enhanced security and cut resistance for demanding applications.
  • Immediate Rekeying Capability: Removable core design enables on-site rekeying without padlock replacement, reducing long-term costs.
  • System Expandability: STANLEY/BEST standardization permits masterkeying into one system that can expand to meet future locking needs.
  • Corrosion-Resistant Finish: Satin chromium plated finish provides durability and professional appearance in various environments.
  • Flexible Configuration Options: Available with key retained or non-key retained operation, bronze or steel chains, and special case embossing options.
  • Professional Security Features: Car seal compatibility and corrosion resistance options available for specialized applications.

Technical Specifications

Installation & Operation

This padlock is designed for use with compatible BEST interchangeable core systems. Refer to manufacturer documentation for proper core installation and removal procedures. Ensure compatibility with existing BEST hardware before installation.

Professional Applications

  • Commercial Building Security Systems
  • Industrial Facility Access Control
  • Educational Institution Security
  • Healthcare Facility Equipment Protection
  • Multi-Tenant Property Management
  • Government and Municipal Applications
  • Warehouse and Distribution Centers

Why Choose BEST Quality?

BEST padlocks deliver professional-grade security with interchangeable core technology that integrates seamlessly across the entire BEST product line. The standardized core system enables cost-effective masterkeying and future expansion while maintaining the reliability demanded in commercial security applications. Engineered for demanding professional environments where dependable access control and system flexibility are essential.

Manufacturer Resources

B Series Padlocks

Product Specs

Product Group:
Other / Miscellaneous Hardware
Product Subgroup:
Padlocks
Subcategory:
Padlocks
Product Type:
Padlocks
Shackle Width:
7/8"
Product Lockbody Color:
626 - Satin Chromium Plated
Product Category:
Other / Miscellaneous Hardware
Product Substrate:
Stainless Steel
Department:
Door Hardware

BEST 21B72T – Frequently Asked Questions

1) Will a BEST 21B padlock key into my existing BEST masterkey system?
Yes. The 21B Series padlock takes the same standard removable core used across most of the BEST line, so it drops into an existing BEST masterkey system without a separate key. That is the main reason facilities standardize on it: one core format across cylindrical locks, mortise locks, and the padlocks on gates, cages, and equipment. The core pulls with a control key, so rekeying happens on site instead of replacing the padlock.
2) What shackle length should I order on a BEST 21B padlock for a hasp versus a chain link?
Shackle length is an order choice on the 21B, not a fixed spec. Five options exist: 3/4 inch, 1-1/2 inch, 2 inch, 4 inch, and a 1 foot version with shroud. A standard door or gate hasp usually only needs the 3/4 or 1-1/2 inch clearance, since a long shackle just gives bolt cutters more room to work. Go to 2 or 4 inch when you are passing through a chain, a thick hasp stack, or two gate loops that sit apart.
3) What is the difference between key retained and non-key retained on a BEST 21B padlock?
Key retained (option T) means the key will not come out of the 21B until the padlock is locked again, so nobody can walk off with the key and leave the lock hanging open. Non-key retained (option L) lets the key come out in either position. Key retained is what most facilities want on tenant storage, cages, and equipment where an open padlock left dangling is the failure mode. Non-key retained suits a lock that is intentionally left open during a shift and locked at the end of it.
4) Is there a cut-resistant or shrouded version of the BEST 21B padlock for outdoor gates?
Three device options address that on the 21B. XSPL gives you a cut resistant shackle in the standard body. SH is the shrouded version, where the body wraps the shackle so bolt cutters cannot get a bite on it, and that is the configuration paired with the 1 foot shroud shackle length. WC adds a weather cover over the keyway, which is the one that matters on an exterior gate or yard fence where rain and grit get into the core. On a truly exposed opening, spec SH and WC thinking of them as two separate problems: attack and weather.
5) Will a 5/16 inch shackle fit through my hasp or chain?
The 21B shackle is 5/16 inch diameter with a 7/8 inch clear width between the legs. Those two numbers decide fit: the hasp staple or chain link opening has to pass 5/16 inch of steel, and whatever you are locking through has to sit inside 7/8 inch of width. A heavy padlock hasp is normally cut for this size, but a light residential-grade hasp or a fine chain may not clear the 5/16 shackle, and a wide bar or thick double loop can exceed the 7/8 inch span.
6) What is the equivalent removable core padlock if my facility is keyed in Sargent instead of BEST?
Interchangeable core padlocks only work inside their own key system, so a BEST 21B will not take a Sargent core. If the building is keyed Sargent, the direct counterpart is the Sargent 60-858-2 removable core padlock, which comes with a 2 inch stainless steel shackle. Match the padlock to whatever core format the rest of the facility already uses, otherwise you are carrying a second key for one gate.
7) What is the closest removable-core padlock to the BEST 21B if the site is standardized on Sargent keying?
The Sargent 60-858-2 is the removable core padlock in the Sargent line, and it carries a 2 inch stainless steel shackle. The BEST 21B uses a standard removable core interchangeable throughout most of the BEST product line, so the choice comes down to which core system the facility already masterkeys. The 21B is offered in 3/4 inch, 1-1/2 inch, 2 inch and 4 inch shackle lengths plus a 1 inch shrouded version, so a 2 inch 21B matches the Sargent shackle length directly.
8) What should I use instead of a BEST 21B on an outdoor gate that sees weather?
The BEST 21B can be ordered with a WC weather cover, and its stainless steel body carries a 626 satin chromium plated finish. If the opening needs a purpose-built weather design instead, the Medeco 521 G8R is a weather-tight padlock with a solid stainless steel body, supplied less pop-out cylinder, and the Medeco 54515G is rated for indoor/outdoor use. For marine exposure the ABUS T84MB/30 Nautic uses a black sleeve over the body, with a 13/64 inch shackle diameter and 1-17/64 inch body width, which is a lighter shackle than the 21B's 5/16 inch.
9) I need a non-key-retaining padlock so the key comes out while the lock is open. What are the options?
The BEST 21B is ordered in either L non-key-retained or T key-retained, so the same series covers both behaviors. Among other makes, the Sargent 858 is a non-key retaining padlock with a stainless steel shackle in US4 satin brass, the Sargent 82-856 is non-key retaining with a 2 inch by 2 inch brass case and stainless steel shackle, and the Medeco 54515G is non-key retaining as well. If the crew must keep the key in hand while the gate is open, any of these work; if you want the key trapped until the lock is closed, order the 21B in T.
10) Can I get a BEST 21B padlock with a chain so it stays attached to the gate?
Yes, and there are three ways to spec it. M1 is a bronze chain, M5 is a galvanized steel chain, and M is the case drilled option, which gives you the hole for a clevis and chain without the chain itself so you can attach your own. Ordering it without any chain option gets the plain padlock. A chained padlock is worth it anywhere the lock gets removed and set down constantly, like dumpster enclosures, roll-up doors, and yard gates, since a lost padlock in a masterkeyed system is a core replacement, not just a hardware store run.
11) Will the BEST 21B padlock rust or corrode in an exterior or washdown location?
The 21B is built with stainless steel and finished in 626 satin chromium plated, which is the same finish code you see on commercial lever and mortise hardware, so a padlock on an exterior gate matches the door hardware inside the building. For a genuinely wet location, add the WC weather cover option, which shields the keyway itself. Water sitting in an unprotected core is what usually kills an outdoor padlock, not the body.
12) I only need a few padlocks and I am not on a masterkey system. Is there something simpler than the BEST 21B?
If nothing else in the building shares a core format, the removable core capability of the 21B is paid for and unused. The Schlage KS23D/KS23F is a brass body padlock with the same 5/16 inch shackle diameter, and the Sargent 758 is a key retaining standard padlock in a US4 satin brass finish. Either covers a handful of openings without committing you to a core system. The 21B earns itself back the moment you have enough locks that on-site rekeying beats replacing hardware.
13) Does the BEST 21B padlock come with a core and keys, or do I order those separately?
Plan on sourcing the core to match your system. The 21B is built around the standard BEST removable core, and the whole value of that design is that the core is keyed into your existing masterkey system rather than shipped as a random keying. If your locksmith already pins BEST cores for the building, they pin one for the padlock the same way. If you are starting a system from scratch, the core keying and the control key are decided at the same time as the rest of the hardware.
14) I want a padlock that stays attached to the hasp so it does not walk off. What are my choices?
The BEST 21B offers chain and case options for exactly this: M1 supplies a bronze chain, M5 a galvanized steel chain, and M leaves the case drilled with no clevis or chain so you can attach your own. Among the comparable set, the padlocks are supplied as standalone bodies without a chain option, so the 21B chain variants are the direct answer for tethering the lock to a gate, trailer, or equipment cabinet.
15) Which of these padlocks is a key-retaining lock in a brass finish rather than chrome?
The Sargent 758 is a key retaining standard padlock in a US4 satin brass finish. The BEST 21B in the T configuration is also key retained, but its lockbody is 626 satin chromium plated over stainless steel. If a facility is standardizing appearance on brass hardware, the 758 matches; if the requirement is a removable core that rekeys on site, the 21B in T is the one to order.
16) Is an electronic padlock an option in place of a mechanical BEST 21B?
The Medeco 54515G XT is an electronic indoor/outdoor padlock, non-key retaining, with a 5/16 inch shackle diameter and supplied with a cylinder. It shares the 21B's 5/16 inch shackle diameter, so it drops into the same hasp. The difference is the credential: the 21B rekeys by pulling its removable core and swapping in another from the BEST system, while the 54515G is managed electronically. A site already masterkeyed on BEST cores keeps the 21B; a site that wants audit and scheduled access at the padlock looks at the 54515G.
17) Can I get BEST 21B padlocks embossed or marked so tenants and crews can tell them apart?
Special case embossing is an available option on the 21B, which is how multi-tenant and multi-site portfolios keep track of which padlock belongs to which building, cage, or department. On a fleet of visually identical satin chromium padlocks, marking the case is usually easier than tagging them, since tags come off.
How fast can I get the BEST 21B72T 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 BEST 21B72T come with a warranty?
Absolutely. The BEST 21B72T 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 BEST 21B72T?
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 BEST 21B72T 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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