Abus 55/45B KA 5453 Solid Brass Padlock

The ABUS 55/45B KA 5453 is a solid brass padlock rated at ABUS Security Level 4, keyed alike to key number 5453, with a hardened steel shackle and a precision pin tumbler cylinder. The 1-11/16-inch brass body houses non-corrosive internal components and self-locks when the shackle is pushed down without a key. It measures 2-31/64 inches in overall height and weighs 0.35 lbs. Two keys are included. A padlock hasp or cable is required and is sold separately.

How the ABUS 55/45B fits the Security Level 4 range

ABUS uses a numerical security level system across its padlock line. Level 4 sits in the mid-range of the scale and is appropriate for outdoor applications where the threat profile is opportunistic rather than targeted. The 55/45B is suited to gates, storage sheds, lockers, toolboxes, cellar windows, switchgear panels, and barriers where a solid brass body and hardened shackle provide meaningful deterrence without over-specifying for the risk level.

For applications requiring a higher security rating, ABUS offers padlocks at Level 6, 8, and above with reinforced shackles, additional shackle locking points, and hardened bodies designed to resist determined attack. The correct tier depends on what is being secured and the realistic exposure of the installation site. The 55/45B's Level 4 rating places it above basic entry-level hardware while keeping it practical for everyday commercial and residential use.

What keyed alike to 5453 means for this padlock

The KA 5453 designation means this padlock is factory-cut to key number 5453. Any other ABUS 55/45B KA 5453 padlock opens with the same key, making it the correct choice when multiple locks on a single property, storage facility, or job site need to operate from one key without a formal master key system. A property manager or maintenance technician can carry a single key and access every secured point on the route. Two keys are included with each padlock at time of purchase.

Shackle dimensions, body construction, and application compatibility

The shackle is 15/64 inch in diameter and 15/16 inch in height, which fits standard hasps, cobra loop cables, and chain links without requiring an oversized staple opening. The 15/64-inch diameter threads cleanly through hasp staples sized for small to medium padlocks. Confirm that the hasp staple opening accepts a 15/64-inch shackle diameter and that the shackle height provides adequate clearance for the hardware being secured before ordering.

The solid brass body resists corrosion in outdoor and high-humidity environments without surface treatment. Inner components are non-corrosive throughout, including the pin stacks and springs, so the cylinder operates consistently over time without binding from moisture infiltration. The self-locking mechanism closes the shackle without a key, which prevents the lock from being left open accidentally. For compatible padlock hasps and security cable hardware, browse the padlocks section on this site. For the full range of ABUS and other security hardware, the miscellaneous locks catalog covers the complete selection. For additional door hardware and security accessories, builders hardware is available for comparison.

Confirm the shackle diameter is compatible with the hasp staple opening before ordering. Two keys are included. A hasp or cable is required and is not included.