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AMERICAN LOCK A31MK SOLID ALUMINUM BODY NON-REKEYABLE PADLOCK OVERVIEW
A31MK Solid Aluminum Body Non-Rekeyable Padlock. Non-Rekeyable Padlocks - Solid Brass.
The American Lock No. A31MK Solid Body Padlock features a 1-1/2in (38mm) wide solid aluminum body and a 1-1/2in (38mm) tall, 1/4in (6mm) diameter chrome shackle for extra corrosion resistance. Ideal for corrosive environments, the non-rekeyable 5-pin APTC12 cylinder can be factory keyed to your requirements.
Buy the American Lock A31MK Solid Aluminum Body Non-Rekeyable Padlock for easy installation and dependable door hardware solution.
AMERICAN LOCK A31MK SOLID ALUMINUM BODY NON-REKEYABLE PADLOCK PRODUCT FEATURES
- 1-1/2in (38mm) wide solid aluminum body offers strong protection against the elements
- 1-1/2in (38mm) tall, 1/4in (6mm) diameter chrome shackle for extra corrosion resistance
- Non-rekeyable 5-pin APTC12 cylinder prevents picking
- Harsh Outdoor Conditions
- Manufacturing Environments
- Self-Storage Units & Lockers
- Edge® Key Control
- Keying Options
- Laser Engraving & Custom Marking
- Shackle Options
AMERICAN LOCK NON-REKEYABLE PADLOCKS - SOLID ALUMINUM COLLECTION
American Lock A30 (A30KD) Solid Aluminum Body Non-Rekeyable Padlock, Keyed Different
American Lock A30KA Solid Aluminum Body Non-Rekeyable Padlock, Keyed Alike
American Lock A30MK Solid Aluminum Body Non-Rekeyable Padlock, Keyed Different (Master Keyed)
American Lock A30KAMK Solid Aluminum Body Non-Rekeyable Padlock, Keyed Alike (Master Keyed)
American Lock A31 (A31KD) Solid Aluminum Body Non-Rekeyable Padlock, Keyed Different
American Lock A31KA Solid Aluminum Body Non-Rekeyable Padlock, Keyed Alike
American Lock A31MK Solid Aluminum Body Non-Rekeyable Padlock, Keyed Different (Master Keyed)
American Lock A31KAMK Solid Aluminum Body Non-Rekeyable Padlock, Keyed Alike (Master Keyed)
American Lock A32 (A32KD) Solid Aluminum Body Non-Rekeyable Padlock, Keyed Different
American Lock A32KA Solid Aluminum Body Non-Rekeyable Padlock, Keyed Alike
American Lock A32MK Solid Aluminum Body Non-Rekeyable Padlock, Keyed Different (Master Keyed)
American Lock A32KAMK Solid Aluminum Body Non-Rekeyable Padlock, Keyed Alike (Master Keyed)
RESOURCES & DOWNLOADS
American Lock A31MK Solid Aluminum Body Non-Rekeyable Padlock Catalog
Manufacturer Resources
Product Specs
- Subcategory:
- Solid Body Padlocks
- Shelf Pack Qty:
- 6
- Master Carton Qty:
- 24
- Shackle Width:
- 3/4"
- Shackle Diameter:
- 1/4"
- Keyed:
- Yes
- Product Group:
- Other / Miscellaneous Hardware
- Product Subgroup:
- Padlocks
- Product Type:
- Padlocks
- Commercial/Residential:
- Commercial
- Product Model:
- A31MK
- Product Color:
- Grey
- Product Shackle Length:
- 1-1/2"
- Product Style:
- Non-Rekeyable Padlocks
- Product Category:
- Other / Miscellaneous Hardware
- Product Substrate:
- Aluminum
- Product Width:
- 1-1/2"
- Department:
- Door Hardware
American Lock AME-A31MK 2KEY – Frequently Asked Questions
1) What does the MK in American Lock A31MK mean, and how is it different from the A31KA?
MK means master keyed. The A31MK ships keyed different, so every lock has its own change key, but all of them also operate under a master key you specify at the factory. The A31KA is keyed alike instead, meaning a group of locks share one common key. If you need a maintenance supervisor to open every padlock on site while each crew or tenant carries only their own key, the A31MK is the version to order. American Lock also lists an A31KAMK, which is keyed alike and master keyed together.
2) Can the A31MK padlock be rekeyed later by a locksmith?
No. The A31MK uses a non-rekeyable 5-pin APTC12 cylinder, so the keying is set at the factory and cannot be changed in the field. If a key is lost or a tenant turns over, you replace the lock rather than repin it. Buyers who need field rekeying or a facility-wide interchangeable core program should look at a removable core padlock such as the Sargent 60-858-2 instead.
3) What is the closest aluminum-body padlock to the American Lock A31MK if I need the same 1-1/2 inch body and 1/4 inch shackle diameter?
The A31MK has a 1-1/2 inch aluminum body with a 1/4 inch diameter shackle. The closest aluminum match on shackle diameter and body width is the ABUS 74/40 insulated safety padlock, which uses a 1/4 inch shackle diameter and a 1-1/2 inch body width with a 6-pin cylinder. The ABUS 76/40 also runs a 1/4 inch shackle but has a plastic-covered aluminum core and a 1-37/64 inch width. The A31MK differs from both in that its 5-pin APTC12 cylinder is non-rekeyable and factory keyed, and it can be supplied master keyed.
4) I need a padlock I can rekey in-house instead of the American Lock A31MK - what should I order?
The A31MK uses a non-rekeyable 5-pin APTC12 cylinder that is factory keyed to your requirements, so field rekeying is not part of how it works. If you want the cylinder changed on site, look at the Sargent 60-858-2 removable core padlock with a 2 inch stainless steel shackle, which accepts an interchangeable core so the keying can be swapped without replacing the lock. Note that it is a steel-shackle padlock rather than the A31MK's aluminum body with 1/4 inch chrome shackle, so its corrosion behavior and dimensions are different.
5) For a marine or washdown application, is the American Lock A31MK the right choice or is there a better-suited padlock?
The A31MK is built for corrosive environments: a solid aluminum body with a chrome-plated 1/4 inch shackle for added corrosion resistance. Two alternatives target wet service differently. The Medeco 521 G8R is a weather-tight padlock with a solid stainless steel body, supplied less pop-out cylinder. The ABUS T84MB/30 Nautic uses a black protective sleeve over a 1-17/64 inch body with a 13/64 inch shackle. The A31MK remains the option if you need the larger 1-1/2 inch body and master keying into an existing system.
6) Is an aluminum body padlock strong enough for outdoor gates and coastal sites?
The A31MK is built around a solid aluminum body with a chrome plated shackle, and that combination is aimed at corrosion resistance rather than maximum attack resistance. It suits harsh outdoor conditions, manufacturing plants, self storage units and lockers, where rust is the thing that kills a padlock. For a high security outdoor opening where cut resistance is the priority, a solid stainless steel body lock like the Medeco 521 G8R weather-tight padlock is the different tool for the job.
7) How many keys come with each American Lock A31MK padlock?
Key count is something you choose when ordering. The A31MK is offered with 0, 1, 2 (the standard), 3, or 4 keys per lock. Property managers issuing keys to tenants often take 2 or 3; facilities running a strict key control program where all keys are cut centrally often take 0 keys per lock.
8) Can I get the A31MK padlock with a chain attached for gates or valves?
Yes. There is a chain option: a #40 sash chain, 9 inches (229mm) long, zinc plated, factory fitted to the lock. That keeps the padlock tethered to a gate post, valve, or locker so it does not walk off when the opening is unlocked. If you do not want it, order the NONE chain option.
9) How do I standardize a whole building on American Lock A31 padlocks with different shackle heights?
The solid aluminum non-rekeyable family shares one body style across three models: the A30, the A31, and the A32. They differ in shackle height, so you can mix heights on the same keying system while keeping the same 1-1/2 inch aluminum body and the same keys across doors, lockers, and gates. Each of the three comes in keyed different, keyed alike, master keyed, and keyed alike master keyed versions.
10) Which padlock has a heavier shackle than the American Lock A31MK for higher-security gates?
The A31MK carries a 1/4 inch diameter shackle, 1-1/2 inch tall. If the opening calls for a thicker shackle, the Schlage KS23D/KS23F brass padlock and the Medeco 54515G XT electronic indoor/outdoor padlock both use a 5/16 inch diameter shackle, and the Medeco 5260 brass body padlock steps up to a 7/16 inch shackle with M3 key technology in satin chrome. Those are brass or steel-bodied locks rather than aluminum, so they weigh more and behave differently in corrosive service.
11) Do I need a key-retaining padlock instead of the American Lock A31MK for lockout or locker use?
If your procedure requires the key to stay captive while the lock is open, look at the Sargent 758 key retaining standard padlock in US4 satin brass. The non-key-retaining counterparts are the Sargent 858 with a stainless steel shackle in US4 satin brass, the Sargent 82-856 with a 2 inch by 2 inch brass case and stainless shackle, and the Medeco 54515G XT electronic padlock, which is non-key retaining with a 5/16 inch shackle. The A31MK's appeal for self-storage, lockers and manufacturing environments is its aluminum body and available master keying.
12) What should I use instead of the American Lock A31MK if I want electronic audit and access control on the padlock?
The A31MK is a mechanical padlock with a 5-pin APTC12 cylinder, factory keyed and master keyed on request. For an electronically credentialed padlock, the Medeco 54515G XT is an electronic indoor/outdoor padlock, non-key retaining, with a 5/16 inch shackle diameter and supplied with cylinder. It is a different operating platform, so plan the credential management alongside any mechanical keys still in use.
13) How are American Lock A31MK padlocks packed for a bulk order?
They come 6 to a shelf pack and 24 to a master carton, which is the practical unit if you are outfitting a storage facility or a fleet of utility cabinets in one go.
14) What color and finish is the A31MK padlock body?
Grey. The body is bare solid aluminum, and the shackle is chrome plated, so a row of them reads as plain metallic grey rather than the painted or colored bodies used for lockout tagout identification. If you need color coded safety padlocks for a LOTO program, an anodized or plastic covered lock like the ABUS 72/30 or ABUS 76/40 is the style to look at.
15) Is a brass-body padlock a better match than the American Lock A31MK for a coastal property?
The A31MK answers corrosion with a solid aluminum body and a chrome-plated shackle. Brass-body options include the Schlage KS23D/KS23F with a 5/16 inch shackle, the Medeco 5260 52 Series brass body with a 7/16 inch shackle in satin chrome, and the Sargent 858 non-key retaining padlock with a stainless steel shackle in US4 satin brass. Brass bodies are heavier for the same footprint, while the A31MK is the lighter aluminum choice at a 1-1/2 inch body with a 1/4 inch shackle.
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Does the American Lock AME-A31MK 2KEY come with a warranty?
Absolutely. The American Lock AME-A31MK 2KEY is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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