Master Lock
Master Lock 25KALF Keyed Padlock 3/8 in Steel
Steel padlock with 3/8 in shackle, 5-pin cylinder and keyed-alike convenience for lockout or security use
- 3/8 in steel shackle resists cutting attempts
- Laminated steel body adds layered strength
- 5-pin cylinder provides pick resistance
- Keyed-alike convenience simplifies multi-lock management
- Two bumpers protect shackle from corrosion
Steel laminated padlock for lockout-tagout
The Master Lock 25KALF is a steel-bodied padlock with a 3/8 in diameter steel shackle and a five-pin cylinder keyed alike. It is intended for lockout-tagout programmes and general security where multiple locks must share one key.
Practical limits of the keyed-alike system
All locks in the set open with the same key, so a single lost key compromises every lock in the group. The laminated steel body and 2 in body diameter resist cutting but the shackle clearance of 1 1/2 in height by 15/16 in width limits the hasp or chain links it can pass through.
Installation and common issues
No tools are needed; the shackle snaps into the hasp and the key turns to lock. The non-removable key can be left in the lock while open, which prevents accidental lock-out but means the key stays exposed. The lock is not weather resistant, so outdoor use will cause corrosion on the steel body and shackle over time.
Highlights
- 3/8 in steel shackle resists cutting attempts
- Laminated steel body adds layered strength
- 5-pin cylinder provides pick resistance
- Keyed-alike convenience simplifies multi-lock management
- Two bumpers protect shackle from corrosion
Specifications
| Brand | MASTER LOCK |
|---|
Questions about this item
Should I choose the keyed-alike version or a different keying option for multiple locks?
The keyed-alike version uses the same K27 keyway across every padlock, so one key opens all of them. Choose it when you want a single key for several locks; pick a different keying option if each lock needs its own unique key.
How does the 3/8-inch hardened steel shackle perform when the lock is installed on a hasp or chain?
The 3/8-inch diameter steel shackle provides a 1 1/2-inch vertical clearance and 15/16-inch horizontal opening, fitting standard hasps and chains while the laminated steel body resists cutting and prying.
What does the 5-pin K27 keyway mean for key control and duplication?
The 5-pin Master K27 keyway is a restricted profile; keys can only be cut by authorised locksmiths, preventing unauthorised duplication and supporting formal key-control procedures.
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