Lockout and tagout
Master Lock 503YLW
Group lock box, wall-mount or portable, steel, yellow
Master Lock 503YLW: Group lock box: the keys of the locks on the isolation points go inside, and each worker adds a personal padlock to the box; the keys stay inside until the last worker unlocks. For lockout / tagout programmes under OSHA 29 CFR 1910.147 and site isolation procedures.
Need a cross-reference?Send the part number or a nameplate photo and we confirm an approved equivalent and availability.Ask about this part
- Genuine partsor approved equivalents on request
- Quotation on requestone offer for mixed lists
- Saudi company, Jeddahdelivery to sites across the Kingdom
- Documents on requestdatasheets, certificates of origin, SABER

Specifications
| Category | Safety equipment and PPE |
|---|---|
| Product group | Lockout and tagout |
| Product type | Group lock box |
| Colour | Yellow |
Datasheet, stock and lead time on request. If this part is discontinued or on long lead time we offer an approved equivalent.
More in Lockout and tagout
- Master Lock 485Gate valve lockout set, all five sizes (480 to 484) for handwheels 25 to 330 mm
- Master Lock 496BWall switch lockout cover for toggle and paddle switches
- Master Lock 503REDGroup lock box, wall-mount or portable, steel, red
- Master Lock 506Circuit breaker lockout set: one 491B (tall / wide toggles) and one 493B (standard toggles)
- Master Lock 1457E410KAPREElectrical lockout kit in toolbox, premium device set and 4 keyed-alike thermoplastic padlocks
- Master Lock 1457VE410KAPREValve and electrical lockout kit in toolbox, premium device set and 4 keyed-alike thermoplastic padlocks
