You may also like
AMERICAN LOCK A21 (A21KD) BRASS BODY REKEYABLE PADLOCK (HIDDEN SHACKLE) OVERVIEW
A21 (A21KD) Brass Body Rekeyable Padlock (Hidden Shackle). Non-Rekeyable Padlocks - Solid Brass.
The American Lock No. A21 (A21KD) Solid Body Padlock features a 1-3/4in (44mm) wide solid brass body to resist corrosion and a 2in (51mm) tall, 5/16in (8mm) diameter hardened boron alloy shackle for superior cut resistance. Ideal for harsh environments, a dual ball bearing mechanism resists pulling and prying while a 5-pin APTC12 non-rekeyable cylinder with serrated pins is virtually impossible to pick.
Buy the American Lock A21 (A21KD) Brass Body Rekeyable Padlock (Hidden Shackle) for easy installation and dependable door hardware solution.
AMERICAN LOCK A21 (A21KD) BRASS BODY REKEYABLE PADLOCK (HIDDEN SHACKLE) PRODUCT FEATURES
- 1-3/4in (44mm) wide solid brass body
- Brass body provides extra corrosion resistance in caustic, corrosive, salty environments
- 2in (51mm) tall, 5/16in (8mm) diameter hardened boron alloy steel shackle for superior cut resistance
- Dual stainless steel ball bearing locking mechanism that resists pulling and prying
- Non-rekeyable 5-pin APCT12 cylinder prevents picking
- Marine & Offshore Security
- Self-Storage Units & Lockers
- Marine Environments
- Sheds, Workshops & Garages
- Keying Options
- Laser Engraving & Custom Marking
- Shackle Options
AMERICAN LOCK NON-REKEYABLE PADLOCKS - SOLID BRASS COLLECTION
American Lock A20 (A20KD) Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Different
American Lock A20KA Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Alike
American Lock A20MK Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Different (Master Keyed)
American Lock A20KAMK Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Alike (Master Keyed)
American Lock A21 (A21KD) Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Different
American Lock A21KA Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Alike
American Lock A21MK Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Different (Master Keyed)
American Lock A21KAMK Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Alike (Master Keyed)
American Lock A22 (A22KD) Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Different
American Lock A22KA Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Alike
American Lock A22MK Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Different (Master Keyed)
American Lock A22KAMK Brass Body Rekeyable Padlock (Hidden Shackle), Keyed Alike (Master Keyed)
RESOURCES & DOWNLOADS
American Lock A21 (A21KD) Brass Body Rekeyable Padlock (Hidden Shackle) Catalog
Manufacturer Resources
Product Specs
- Subcategory:
- Solid Body Padlocks
- Shelf Pack Qty:
- 6
- Master Carton Qty:
- 24
- Shackle Width:
- 3/4"
- Shackle Diameter:
- 5/16"
- Keyed:
- Yes
- Product Group:
- Other / Miscellaneous Hardware
- Product Subgroup:
- Padlocks
- Product Type:
- Padlocks
- Commercial/Residential:
- Commercial
- Product Model:
- A21
- Product Color:
- Gold
- Product Shackle Length:
- 2"
- Product Style:
- Non-Rekeyable Padlocks
- Product Category:
- Other / Miscellaneous Hardware
- Product Substrate:
- Brass
- Product Width:
- 1-3/4"
- Department:
- Door Hardware
American Lock AME-A21KD 2KEY – Frequently Asked Questions
1) Will the American Lock A21 padlock fit my hasp opening?
Check the shackle clearance before ordering. The A21 gives a 3/4 inch shackle width (the horizontal gap between the shackle legs) with a 5/16 inch diameter shackle, so the hasp staple has to accept a 5/16 inch shank and the loops must sit inside that 3/4 inch span. Shackle height is 2 inches and the brass body is 1-3/4 inches wide, so you also need that much room around the staple.
2) Can the American Lock A21 be rekeyed to my existing key system?
No. The A21 uses a 5-pin APTC12 non-rekeyable cylinder, so it cannot be repinned to an existing system. If you need keys matched, order the keying variant you want up front: the family covers keyed different (A21), keyed alike (A21KA), keyed different master keyed (A21MK) and keyed alike master keyed (A21KAMK). The plain A21 ships keyed different, meaning each lock has its own key.
3) What should I use instead of the American Lock A21 for lockout/tagout on electrical equipment?
The A21 is a solid brass security padlock and is not a safety lock. For lockout/tagout, 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 72/30 is an anodized aluminum safety padlock with a 1-1/4 inch body and 3/16 inch shackle. Both are lighter-bodied than the A21's 1-3/4 inch brass body with 5/16 inch shackle.
4) What is the closest brass padlock to the American Lock A21 if I need the same 5/16 inch shackle diameter?
The Schlage KS23D/KS23F is a brass padlock with a 5/16 inch diameter shackle, matching the A21's 5/16 inch shackle diameter and brass body substrate. The A21 body is 1-3/4 inch wide with a 2 inch shackle length and a hidden-shackle solid body, so the two differ in body profile even where the shackle diameter lines up.
5) I need a padlock that takes my facility's interchangeable core. Is the American Lock A21 the right pick?
No. The A21 uses a non-rekeyable 5-pin APTC12 cylinder, so it cannot accept a facility core. For a core-based system, the Sargent 60-858-2 is a removable core padlock with a 2 inch stainless steel shackle, which matches the A21's 2 inch shackle length while letting you key it into an existing core system.
6) How many keys come with the American Lock A21, and can I order it with none?
Key count is a choice you make on the order. Options run 0, 1, 2 (standard), 3 or 4 keys per lock. Locksmiths and facilities that stamp and issue their own keys often take the 0-key version; property managers issuing to tenants usually want 2 or more.
7) Can I get the A21 padlock with a chain so it stays attached to the gate?
Yes. Every key-count version can be ordered with a #40 sash chain, 9 inches (229mm) long, zinc plated, or with no chain at all. The chain keeps the lock tethered to the hasp or gate so it does not walk off when the lock is open, which is why self-storage and yard applications ask for it.
8) What is the difference between the American Lock A20, A21 and A22 brass padlocks?
They are the same solid brass body and non-rekeyable cylinder platform, separated by shackle height. The A21 carries a 2 inch tall, 5/16 inch diameter hardened boron alloy shackle. The A20 and A22 are the shorter and longer shackle versions of the same series. Pick by how much hasp or chain you need to pass through, then pick your keying: KD, KA, MK or KAMK.
9) How does the A21 resist someone prying or pulling the lock open?
A dual stainless steel ball bearing locking mechanism holds the shackle on both legs, which resists pulling and prying rather than relying on a single latch. The 5-pin APTC12 cylinder uses serrated pins to fight picking, and the boron alloy shackle handles cutting attacks. It is a commercial-duty padlock, not a residential one.
10) What are the alternatives to the American Lock A21 if I need a removable core or a brass-body padlock on a different key system?
A few directions depending on what drives the choice. For interchangeable core so your locksmith controls keying, the Sargent 60-858-2 is a removable core padlock with a 2 inch stainless steel shackle, the same shackle height as the A21. For another brass-body padlock with a 5/16 inch shackle, the Schlage KS23D/KS23F matches on both counts. The Medeco 5260 is a 52 Series brass body padlock with a heavier 7/16 inch shackle and M3 key technology if you want high-security keying. The A21 stays the choice when you want a fixed, non-rekeyable cylinder and low cost per opening.
11) For a marina or dockside application, how does the American Lock A21 compare with other corrosion-resistant padlocks?
The A21 uses a solid brass body specifically to resist caustic, corrosive and salty environments, with a hardened boron alloy shackle. Alternatives built for wet exposure include the Medeco 521 G8R weather-tight padlock with a solid stainless steel body, and the ABUS T84MB/30 Nautic with a black sleeve over the body and a 13/64 inch shackle diameter on a 1-17/64 inch body. The T84MB/30 is a much smaller body than the A21's 1-3/4 inch width.
12) Is there a brass padlock with a heavier shackle than the American Lock A21?
Yes. The Medeco 5260 is a 52 Series brass body padlock with a 7/16 inch shackle diameter and M3 key technology in satin chrome, a larger shackle than the A21's 5/16 inch diameter, 2 inch tall boron alloy shackle. The A21 keeps its shackle enclosed in a solid brass body for a shrouded application.
13) Does the American Lock A21 retain the key when unlocked, or do I need a key-retaining padlock?
The A21 is a keyed padlock and is supplied keyed different in chain and no-chain configurations. If your procedure requires the key to stay captive while the lock is open, the Sargent 758 is a key retaining standard padlock in US4 satin brass. If you specifically want the key removable when open, the Sargent 858 is the non-key-retaining version with a stainless steel shackle, also US4 satin brass.
14) We want audit trail and scheduled access on a padlock. Can the American Lock A21 do that?
No. The A21 is a mechanical padlock with a 5-pin APTC12 cylinder and no electronics. For electronic credential control, the Medeco 54515G XT is an electronic indoor/outdoor padlock, non-key retaining, with a 5/16 inch shackle diameter and cylinder included, so it matches the A21's 5/16 inch shackle diameter on a keyed-electronic platform.
15) What looks like a substitute for the American Lock A21 but is not?
The ABUS 76/40 is a plastic-covered aluminum core padlock with a 1/4 inch shackle diameter and 1-37/64 inch width, close to the A21 in size but built on an aluminum core rather than the A21's solid brass body with a 5/16 inch hardened boron alloy shackle. Likewise the Sargent 82-856 is a KESO Series non-key-retaining padlock with a 2 inch by 2 inch brass case and stainless steel shackle, brass like the A21 but on an exposed-shackle case rather than the A21's hidden shackle design.
16) I need to standardize padlocks across a facility. How does the A21 pack?
The A21 ships 6 per shelf pack and 24 per master carton, which is convenient when you are rolling out one lock type across storage units, lockers or gate hardware. Since the cylinder is non-rekeyable, decide the keying scheme first: keyed alike if maintenance staff should carry one key, master keyed if you want a supervisory key over individually keyed locks.
How fast can I get the American Lock AME-A21KD 2KEY 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 American Lock AME-A21KD 2KEY come with a warranty?
Absolutely. The American Lock AME-A21KD 2KEY 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 American Lock AME-A21KD 2KEY?
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 American Lock AME-A21KD 2KEY 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.