American Lock Round Body Padlocks

American Lock round body padlocks are the circular-profile solid steel padlocks from American Lock, a Master Lock Company brand. The round body shape is machined from case-hardened solid steel and provides 360-degree protection against attack from any angle. Unlike rectangular padlock bodies that have exposed edges and flat face surfaces, the round body design eliminates corners and grip points that prying tools, bolt cutters, and cut-off saws use to gain purchase. This is the reason round padlocks are specified on applications where the padlock itself is the last line of physical security.

If you've been searching for "american lock," "american lock company," "american padlocks," "round locks," "round padlocks," "circle locks," or "round lock," this is the correct category at American Locksets, trusted since 2001.

Why Round Body Padlocks Resist Attack Better Than Rectangular Locks

The geometry of a round padlock body is not cosmetic. Case-hardened solid steel in a circular form distributes applied force across the entire body surface rather than concentrating stress at corners or edges. When a prying bar or bolt cutter jaw contacts a round body, it slides off rather than catching. Saws lose their angle of attack. The rounded profile also shrouds a larger portion of the shackle, reducing exposed shackle length even on models with longer clearance.

American Lock round body padlocks add dual ball bearing locking mechanisms, which means the shackle is retained on both heel and toe at the same time. Single-bolt locking mechanisms can be attacked by driving the shackle sideways out of the heel hole. Dual ball bearing locks block both insertion points simultaneously, so the shackle can't be popped by pulling, prying, or shimming.

American Lock A700 – Chrome Plated Round Body, Short Shackle

The American Lock A700 is the most widely specified model in this series. It features a 2-1/2-inch (64mm) wide case-hardened chrome plated solid steel body, a 1-1/16-inch (27mm) tall shackle with 7/16-inch (11mm) diameter boron alloy construction, dual ball bearing locking, and a rekeyable 5-pin APTC12 cylinder with serrated pins. The serrated pin design is what makes this cylinder picking-resistant in practical use, not just on paper.

Available in multiple keying configurations:

The A700 KD is keyed different, one lock per unique key. The A700 KZ is zero-bitted, shipped without a key cut, for facilities that combinate cylinders in-house. Multiple KA (keyed alike) variants including the A700KA 32457, 32521, 32526, 35852, 56636, and 63773 allow ordering groups of round padlocks that all open with the same key, which is the standard specification for multi-lock facility applications.

American Lock A701 – Chrome Plated Round Body, Long Shackle

The A701 uses the identical 2-1/2-inch chrome plated round body as the A700 but with a 2-inch (51mm) tall shackle. The longer shackle provides the clearance needed for thicker hasps, wider chain links, and mounting hardware that requires more travel for the shackle to engage. The 7/16-inch boron shackle diameter and dual ball bearing mechanism are the same as the A700.

KD and multiple KA variants (A701KA 32244, 32457, 35257, 35724, 35852, 63387, 63773) follow the same keyed alike pattern for multi-door or multi-station installations. Ordering padlocks with matching KA key numbers means every lock in a batch opens with a single key, which is the correct approach for storage facilities, fleet yards, utility access points, and anywhere a single supervisor needs one key to open every padlock in the system.

American Lock A702 – Zinc Plated Round Body

The A702 is the zinc-plated variant of the A700 body profile. The 2-1/2-inch (64mm) wide case-hardened solid steel body uses a zinc finish rather than chrome, which is specified when the application requires a lower-cost finish option or when the zinc plating aesthetically matches other hardware on the installation. The A702 KD and A702KA 23457 carry the same 1-1/16-inch boron shackle and 5-pin APTC12 rekeyable cylinder as the chrome-plated models.

American Lock AH10 and AH11 – Round Body with Blade Tumbler Cylinder

The AH10 and AH11 are the round body padlocks with a debris-resistant ABTC1 disc tumbler (blade) cylinder instead of the pin tumbler APTC12. The blade cylinder design is engineered for outdoor applications where dirt, dust, ice, and moisture can clog a pin tumbler cylinder over time. The disc tumbler design is less susceptible to debris intrusion, which makes the AH10 and AH11 the correct specification for outdoor utility enclosures, remote access points, outdoor storage facilities, and coastal or agricultural environments.

The AH10 body is 2 inches (51mm) wide with a 1-1/16-inch (27mm) shackle. The AH11 uses the same 2-inch body with a 2-inch (51mm) tall shackle for applications needing longer clearance. Both use the same nickel-plated 7/16-inch boron alloy shackle and dual ball bearing locking mechanism. Available as AH10-KAE159 (keyed alike) and AH11-KD (keyed different).

Browse the complete American Lock round body padlocks catalog at American Locksets. For the American Lock A3700 Series door-key-compatible solid brass padlocks, see the A3700 Series. For the full American Lock padlock catalog and all commercial padlock options, browse the padlock section. For all padlock and cylinder hardware, see commercial locks.

Frequently Asked Questions About American Lock Round Body Padlocks

Q: What is an American Lock round body padlock?

A circular-profile case-hardened solid steel padlock with dual ball bearing locking, a boron alloy shackle, and a rekeyable cylinder. The round body resists prying, shimming, and cutting attacks better than rectangular padlock bodies.

Q: What is the difference between the A700 and A701?

Shackle height only. The A700 has a 1-1/16-inch short shackle. The A701 has a 2-inch long shackle. Both use the same 2-1/2-inch chrome plated round body and 5-pin rekeyable cylinder.

Q: What does KA mean on American Lock padlocks?

KA = Keyed Alike. All padlocks ordered with the same KA key number open with the same key. This allows a facility to use one key across multiple padlocks, which is the standard specification for multi-lock commercial applications.

Q: What is the difference between the A700 and AH10 series?

The A700 uses a 5-pin APTC12 pin tumbler cylinder. The AH10 uses an ABTC1 disc tumbler (blade) cylinder that's debris-resistant for outdoor use. The AH10 is the correct choice for outdoor, dusty, or marine environments.

Q: What does zero-bitted mean on the A700 KZ?

Zero-bitted means the cylinder ships without a key cut. All pin heights are set to zero. Facilities that key cylinders in-house order zero-bitted padlocks and combinate the cylinder themselves to their existing key system.