Master Lock 421 lockout hasp

Lockout hasp for six padlocks

The Master Lock 421 is a steel lockout hasp coated in red vinyl, designed to keep equipment inoperative during maintenance. It accepts up to six padlocks so every worker on the job can apply their own lock. The snap-on style jaw closes securely over the energy-isolation point. Heavy-gauge steel construction resists prying and impact in industrial environments.

Suits teams needing group lockout

This hasp fits maintenance crews who require multiple-person lockout at a single isolation point. The 3/8-inch maximum shackle diameter accommodates standard safety padlocks used in many facilities. It is not for applications that need more than six locks or a larger jaw opening than 1 1/2 inches. Buyers who want a different colour code or a non-vinyl coating should look at other models.

Six-padlock capacity decides fit

The defining specification is the six-padlock limit, which determines whether the hasp matches your lockout procedure. If your safety plan calls for more authorised workers per energy source, this unit will not comply. Verify the 1 1/2-inch closed hasp hole size against your switch or valve dimensions before purchasing.