Master Lock 81KALF-12R11 Laminated Steel Padlock

Product Description

The MASTER LOCK 81KALF-12R11 is a laminated steel padlock designed for industrial and commercial security applications where multiple locks must operate on a single key. The body is constructed from laminated steel for superior resistance to drilling and prying. The shackle is steel with a 5/16-inch diameter, 3/4-inch width, and 1-1/2-inch clearance height. At 3-1/4 inches tall and 1-3/4 inches wide, this lock suits standard hasp and chain applications. The 5-pin cylinder provides added pick resistance. Weighing 0.649 pounds, it is a solid, dependable lock for job-site, facility, and equipment security.

This padlock is suited for use in facilities where keyed-alike convenience is required across multiple access points — storage units, equipment enclosures, gate hasps, and lockout/tagout (LOTO) programs. The keyed-alike configuration allows a single key to operate multiple locks in the same series, reducing key management burden for maintenance technicians, contractors, and facility managers. The laminated steel body and steel shackle provide durability in outdoor and industrial environments.

Key Features

• Keyed alike — one key operates all locks in the same series
• Laminated steel body resists drilling and prying
• 5-pin cylinder for improved pick resistance
• Steel shackle: 5/16-inch diameter, 3/4-inch width, 1-1/2-inch clearance height
• Body dimensions: 3-1/4 inches high, 1-3/4 inches wide, 3/4 inches thick
• Gray and silver finish suited for industrial environments

Compatibility

Designed as an OEM-style replacement and standard fitment for hasps, chains, and enclosure latches requiring a 1-3/4-inch wide laminated steel padlock body with a keyed-alike cylinder configuration.

Installation Notes

Installation requires no tools — the shackle inserts directly into compatible hasps or chain links. Confirm hasp slot and shackle clearance dimensions before installation to ensure proper fit. For lockout/tagout applications, verify compliance with applicable OSHA 29 CFR 1910.147 requirements before placing the lock into service. Inspect shackle and body for wear or damage at regular intervals when used in corrosive or high-cycle environments.