Master Lock 3KALF-3727 Laminated Steel Padlock Keyed Alike

Product Description

The MASTER LOCK 3KALF-3727 is a laminated steel padlock designed for light industrial, commercial, and trade applications requiring reliable keyed-alike access control. The body measures 1-9/16 inches wide and is constructed from laminated steel with a silver finish, providing solid resistance to tampering and everyday wear. The shackle diameter is 9/32 inches with 1-1/2 inches of clearance, making it suitable for standard hasps, chains, and lockout-tagout (LOTO) applications. The lock is keyed to key number 3727, allowing multiple units to be operated by the same key.

This padlock is used in facility maintenance, electrical and mechanical lockout-tagout procedures, storage security, and gate or cabinet locking. Its keyed-alike configuration makes it practical for service teams that need to operate multiple locks with a single key, reducing the need to carry multiple keys on a job. Typical installers include electricians, facilities technicians, and maintenance personnel following OSHA LOTO requirements.

Key Features

• Laminated steel body construction for durability in demanding environments
• 1-9/16 inch body width fits standard hasps and lockout devices
• 9/32 inch shackle diameter with 1-1/2 inches of shackle clearance
• Keyed alike to key number 3727 for multi-lock single-key convenience
• Silver finish laminated steel resists corrosion and surface wear

Compatibility

Designed as an OEM-style replacement or addition for keyed-alike lock sets using key number 3727. Compatible with standard hasps, lockout-tagout devices, chains, and gate hardware accepting a 9/32 inch shackle diameter.

Installation Notes

Installation requires no tools beyond verifying hasp or anchor hardware is compatible with the shackle dimensions. Always confirm the lock is fully engaged before applying tension to the shackle. When used in lockout-tagout procedures, follow OSHA 29 CFR 1910.147 energy control requirements. Verify that all keyed-alike locks in the set are matched to the correct key number before deploying in the field.

Technical Specifications

• Body Style: Laminated steel
• Body Width: 1-9/16 inches
• Material: Steel
• Color: Silver
• Keying: Keyed Alike
• Key Number: 3727
• Shackle Diameter: 9/32 inches
• Shackle Clearance: 1-1/2 inches
• Weight: 0.49 pounds
• Unit of Measure: Each

Standard Information

• Brand: MASTER LOCK
• Manufacturer Part Number: 3KALF-3727