The Ilco 1556 key blank is designed for ESP-style locks, commonly used in cabinet locks, cam locks, mailbox locks, and light-duty commercial or industrial applications. It is widely identified by the references 1556 and ES1, making it a recognizable and frequently stocked blank for locksmiths and maintenance teams.

This blank is commonly used in office furniture, lockers, utility panels, and mailbox systems where compact cam or wafer locks are installed. Its consistent profile and availability across multiple manufacturers make it a reliable choice for duplication and replacement work.

Detailed cross-reference research confirms strong equivalents across major brands, including JMA ESP-1D, Silca ESP1, Curtis ES-1, and several additional manufacturer codes, making it easy to match against existing keys or alternate blank numbers.

Key Features:

• Ilco 1556 key blank
• Commonly referenced as ES1
• Designed for ESP-style cam and cabinet locks
• Suitable for mailbox, locker, and utility lock applications
• Reliable for duplication and replacement keys
• Broad multi-brand cross-reference support

Applications:

• Cabinet and cam locks
• Mailboxes and locker systems
• Office furniture locks
• Utility panels and enclosures
• Locksmith and maintenance key duplication

Cross Reference:

• Ilco: 1556
• Ilco EZ: ES1
• JMA: ESP-1D
• Silca: ESP1
• Curtis: ES-1
• Taylor: E61
• Cole: ES1
• Jet: ES1
• Dominion: ES1