Master Lock
Master Lock M15XLF Keyed Padlock 7/16 in Shackle Steel
A laminated steel padlock with a 7/16 in boron shackle and five-pin cylinder for high-security lockout applications
- High security rating protects valuable assets
- Boron shackle resists cutting and sawing attacks
- Five-pin cylinder increases pick resistance
- Laminated steel body withstands physical abuse
- 1-1/2 inch shackle clearance fits various hasps
Padlock for Lockout and Security
This Master Lock M15XLF padlock is designed for lockout/tagout procedures and general security applications. Its laminated steel body and boron shackle provide physical resistance for industrial or commercial use. The five-pin cylinder uses a Master K1 keyway with keys cut differently for each lock. Buyers who need weather-resistant construction or interchangeable cores should look elsewhere.
Sustained Physical Resistance
The hardened boron shackle resists cutting and sawing during prolonged attack attempts. Laminated steel body layers absorb impact and prying forces over time without structural failure. The single bumper reduces internal wear from repeated shackle cycling in high-frequency use. High-security rating reflects performance under sustained mechanical stress rather than brief exposure.
Straightforward Installation Steps
The 7/16 inch shackle diameter fits standard hasps and chain links without modification. Insert the shackle through the attachment point and press down until the locking mechanism engages audibly. The 1 1/2 inch shackle height clears most staple thicknesses encountered in typical lockout points. Misalignment between the shackle and body holes is the most common cause of difficult locking or key rotation.
Highlights
- High security rating protects valuable assets
- Boron shackle resists cutting and sawing attacks
- Five-pin cylinder increases pick resistance
- Laminated steel body withstands physical abuse
- 1-1/2 inch shackle clearance fits various hasps
Specifications
| Brand | MASTER LOCK |
|---|
Questions about this item
Does the 5-pin cylinder generate any noise or heat during continuous outdoor use?
The lock is a purely mechanical device with no moving electronics, so it produces no operational noise or heat.
What door or hasp thickness can the 7/16 in boron shackle fit through?
The shackle clears openings up to 1 1/2 in high and 1 3/16 in wide, so the mounting hole or hasp must be within those dimensions.
Will the Master K1 keyway work with the same key as my older Master Lock No. 3 padlocks?
Only if those older locks also use the Master K1 keyway; different keyways cannot share a key.
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