Master Lock 4ka-0712 Laminated Brass Padlock Keyed Alike

Product Description

The MASTER LOCK 4ka-0712 is a laminated brass pin tumbler padlock built for demanding environments where corrosion resistance is critical. The body measures 1-9/16 inches wide and is constructed from laminated brass, providing excellent resistance to rust and corrosion in marine, coastal, and other harsh outdoor settings. The hardened steel shackle measures 3/4 inches tall and 9/32 inches in diameter, delivering strong cut resistance. Dual ball bearing locking engages when the shackle closes to maximize pry resistance. A 4-pin W1 cylinder resists picking attempts. This padlock ships in a keyed alike configuration under key series 0712, meaning multiple locks share a single operating key.

This padlock is well suited for marine dock boxes, gate hasps, storage lockers, and outdoor utility enclosures where moisture and salt air degrade standard padlocks quickly. The keyed alike feature makes it a practical choice for facilities managers, maintenance crews, and service technicians who need a single key to operate multiple locks across a site. The laminated brass construction makes it appropriate for both residential and light commercial applications in corrosive environments.

Key Features

• 1-9/16 inch wide laminated brass body for excellent corrosion resistance in marine and harsh outdoor environments
• Hardened steel shackle at 3/4 inch tall and 9/32 inch diameter for strong cut resistance
• Dual ball bearing locking mechanism for maximum pry resistance
• 4-pin W1 cylinder designed to resist picking
• Keyed alike 0712 series — multiple locks operate with the same key for simplified key management

Compatibility

Keyed alike padlocks with the W1 cylinder can be ordered to match other locks sharing the W1 key series, allowing multiple units to operate from a single key.

Installation Notes

Installation requires no tools beyond correct hasp or shackle clearance for the 9/32 inch diameter shackle. Verify that the hasp slot or locking tab opening accommodates the shackle dimensions before securing the lock. In marine or salt-air environments, periodically inspect the shackle and body for wear and lubricate the cylinder with a dry lubricant to maintain smooth operation. Do not force the shackle closed if the hasp is misaligned, as this can damage the locking mechanism.

Technical Specifications

• Body Width: 1-9/16 inches (40 mm)
• Body Material: Laminated Brass
• Shackle Material: Hardened Steel
• Shackle Height: 3/4 inches (19 mm)
• Shackle Diameter: 9/32 inches (7 mm)
• Cylinder Type: 4-Pin W1
• Locking Mechanism: Dual Ball Bearing
• Key Series: 0712 (Keyed Alike)

Standard Information

• Brand: MASTER LOCK
• Manufacturer Part Number: 4ka-0712