Master Lock Co 3KA-3447 Laminated Padlock Keyed Alike

Product Description

The MASTER LOCK CO 3KA-3447 is a 1.5-inch laminated padlock designed for keyed-alike applications where multiple locks must operate from a single key. The lock is keyed alike to key 3447, making it a practical choice for facilities, job sites, or equipment rooms where one key needs to operate several locks. The shackle measures 0.75 inches in length and 9/32 inches in diameter, providing a compact, secure fit across a range of hasp and latch hardware. Compatible key blanks include the Master Lock K1BOX or the Ilco blank M1 TV 320-952, useful information when copies are needed in the field.

This padlock is suited for light to medium-duty commercial and industrial applications. Typical install scenarios include securing electrical panel disconnects, toolboxes, gate hasps, storage lockers, and equipment cabinets. The keyed-alike configuration is especially useful on job sites where multiple technicians need access to the same secured points without carrying separate keys. Each unit is individually boxed and sold in packages of six, making it easy to deploy a matched set across a single site or service vehicle.

Key Features

• Keyed alike to key 3447 — one key operates all locks in the set
• 1.5-inch laminated body construction for durability
• Shackle length of 0.75 inches and shackle diameter of 9/32 inches
• Compatible with Master Lock key blank K1BOX or Ilco blank M1 TV 320-952
• Sold in a package of six individually boxed units

Compatibility

Designed for use with standard hasps, latches, and staples accepting a shackle diameter of 9/32 inches. Key blanks K1BOX (Master Lock) and M1 TV 320-952 (Ilco) are confirmed compatible for key duplication.

Installation Notes

Installation requires no special tools — align the shackle with the hasp or staple and close until the shackle clicks into the locked position. Before deploying on electrical equipment or disconnect panels, de-energize the circuit and follow applicable NFPA 70E lockout/tagout procedures. Verify shackle clearance against the hasp opening before purchase, as laminated padlocks have fixed shackle dimensions. Key duplication should be performed using the confirmed compatible blanks listed above to ensure proper fit and operation.

Technical Specifications

• Body Width: 1.5 inches
• Shackle Length: 0.75 inches
• Shackle Diameter: 9/32 inches
• Keying: Keyed Alike to Key 3447
• Compatible Key Blanks: Master Lock K1BOX, Ilco M1 TV 320-952
• Weight: 2.58 pounds
• Package Quantity: 6 per package
• Unit of Measure: EA

Standard Information

• Brand: MASTER LOCK CO
• Manufacturer Part Number: 3KA-3447