Master Lock Co 3UPLF Universal Pin Padlock

Product Description

The MASTER LOCK CO 3UPLF is a Universal Pin padlock designed for use with the Master Lock Universal Pin keying system. The shackle measures 1-1/2 inches in length and 3/4 inches in diameter, making it suitable for standard hasp and chain applications. No keys are included with this padlock. Rekeying is performed using punch tool 376, which allows the lock to be pinned to a specific key without removing the cylinder. Compatible key blanks include the Master Lock K1BOX and the Ilco blank M1 TV 320-952. This lock is installed and serviced by locksmiths and security professionals.

The 3UPLF is suited for commercial and light industrial access control applications where a rekeyable padlock is required. The Universal Pin system allows facilities managers, locksmiths, and security technicians to key multiple locks alike on-site without specialized equipment beyond the punch tool. Typical installations include tool cribs, storage units, job-site trailers, and gate hardware. The unit is sold individually and packaged in a boxed format, with a package quantity of six units per case.

Key Features

• 1-1/2 inch shackle length for standard hasp and chain compatibility
• 3/4 inch shackle diameter for durability in light industrial use
• Compatible with Master Lock Universal Pin keying system for on-site rekeying
• Rekey using punch tool 376 without removing the cylinder
• Accepts Master Lock key blank K1BOX or Ilco blank M1 TV 320-952
• No keys included — intended for pinning to an existing key system

Compatibility

Designed for use with the Master Lock Universal Pin system. Accepts key blanks Master Lock K1BOX and Ilco M1 TV 320-952. Rekeying requires punch tool 376.

Installation Notes

Installation and rekeying of this padlock should be performed by a qualified locksmith or security technician familiar with pin tumbler lock systems. Before rekeying, ensure no load is applied to the shackle and the lock is in the open position. Use only punch tool 376 to seat Universal Pin components — do not attempt to drive pins with improvised tools, as this can damage the cylinder. Follow all applicable site security and access control guidelines when deploying rekeyable hardware.

Technical Specifications

• Shackle Length: 1-1/2 inches
• Shackle Diameter: 3/4 inches
• Weight: 2.93 pounds
• Keying System: Master Lock Universal Pin
• Rekeying Tool Required: Punch Tool 376
• Compatible Key Blanks: Master Lock K1BOX, Ilco M1 TV 320-952
• Keys Included: None
• Package Quantity: 6 per case
• Unit of Measure: EA

Standard Information

• Brand: MASTER LOCK CO
• Manufacturer Part Number: 3UPLF