Master Lock 1KA 3374 OEM Produced Padlocks

While Nearly Universal ... There Are A Few Locks Your Existing M1-System Inspired "3374" Key Number Cannot Be Transferred Into For Segregated Safety Concerns:

Laminated Brass Series:

• 4KD: No Cross-Compatability
• 4KA-3374: Can Be Matched To Existing KA3374 Key System

Solid Brass (Pro Series):

• 6850KD: No Cross Compatability
• 6850KA-M1-3374: Keyed Alike To Existing System

Laminated Steel Series:

• No. 1KD: No Cross-Compatability
• No. 1KA-3374: Can Be Keyed Alike To Existing "3374" System
• No. 1KALF-3374: Can Be Keyed Alike To Existing "3374" System
• No. 1KALJ-3374: Can Be Keyed Alike To Existing "3374" System
• No. 3KA-3374: Can Be Keyed Alike To Existing "3374" System
• No. 3KALF-3374: Can Be Keyed Alike To Existing "3374" System
• No. 3KALH-3374: Can Be Keyed Alike To Existing "3374" System
• No. 5KA-3374: Can Be Keyed Alike To Existing "3374" System
• No. 5KALF-3374: Can Be Keyed Alike To Existing "3374" System
• No. 5KALJ-3374: Can Be Keyed Alike To Existing "3374" System
• No. M1-3374: Cut Keys Can Match Existing "3374" Keying System