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Yellow laminated steel padlock with open steel shackle

Master Lock

Master Lock 3YLW Lockout Padlock Yellow 1-1/4"H

SKU CH-GNNZ-A47QC

Safety padlock with a 5/16 in steel shackle, laminated yellow body and keyed-different cylinder for lockout procedures

  • Product typeSafety
  • Bright yellow finish aids quick visual identification on busy job sites
  • Pry-resistant steel body protects against forced-entry attempts
  • Keyed-different cylinder ensures each worker holds a unique key
  • Laminated steel construction resists impact and harsh environments
  • Compact 1-1/4 inch body fits tight lockout points easily

Safety Padlock for Lockout Procedures

The Master Lock 3YLW is a yellow laminated steel padlock designed for industrial lockout and tagout programs. Its keyed-different cylinder ensures each worker holds a unique key, preventing accidental removal by another person. The 1-1/4 inch body height and 5/16 inch steel shackle fit standard lockout hasps and energy isolation points.

Pry-Resistant Steel Construction

The laminated steel body and hardened steel shackle provide pry-resistant strength for demanding environments. A 3/4 inch vertical shackle clearance accommodates thick valve handles or oversized breaker toggles. Non-removable key operation keeps the key captive while the shackle is open, reducing the chance of leaving a lock unlocked.

High-Visibility Yellow Finish

The bright yellow coating on both body and bumper improves visual identification during group lockout scenarios. Standard key style allows straightforward key management without proprietary keyways. No additional accessories or software are bundled with this padlock.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $6.99
Cheaper than about 93% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMaster Lock
Product typeSafety

Questions about this item

How do I install the 5/16 in shackle through my lockout hasp, and what step is often missed?

Insert the 5/16 in steel shackle through the hasp holes, close the shackle fully, then turn the standard key to lock; the step often missed is verifying the shackle clicks into both locking notches before removing the key.

What maintenance or replacement will this yellow laminated steel padlock need over time?

Apply a light dry lubricant to the keyway and shackle pivot occasionally; replace the padlock if the 5/16 in shackle shows bending, the laminated body delaminates, or the keyed-different cylinder no longer turns smoothly.

What limit appears first when this lockout padlock sees repeated daily use on a busy panel?

The 5/16 in steel shackle and laminated body resist prying, but frequent cycling wears the keyed-different cylinder pins first, leading to sticky key rotation before the shackle or body shows fatigue.

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