Securing Safety: The Importance of Lockout Tagout Hasps in the Workplace
Posted by ZING Safety on May 2nd 2023
Quick Definition A LOTO hasp is a metal connector placed through an energy-isolating device during maintenance or repair. It provides multiple padlock holes so every authorized worker can apply their own lock or tag—preventing re-energization until all locks are removed.
Why Hasps Are Essential
Hasps enable group lockout—each worker controls their own safety by adding a personal lock or tag to the hasp. This:
- Prevents accidental startup while work is performed.
- Creates clear accountability for every worker involved.
- Improves efficiency by centralizing multiple locks at a single isolation point.
Common Types of LOTO Hasps
Steel or Aluminum
Heavy-duty, cut-resistant, ideal for rugged environments and higher temperature areas.
Non-Conductive/Nylon
Electrical applications; helps reduce conductivity near energized components.
Scissor / Clamp Style
Wide jaw opening for valves and oversized isolation points; up to 6–12 lock holes.
Snap-On / Spring Hasp
Fast one-hand application; good for frequent changeovers and shift work.
High-Visibility
Colored or labeled for department, shift, or asset identification to support audits.
Car-Seal / Cable Hasps
Long reach and irregular isolation points; pairs well with group lock boxes.
Implementing Hasps Effectively
- Choose the right hasp: Match jaw size, material, and lock-hole count to the isolation device and environment.
- Train authorized & affected employees: Applying/removing locks, verifying isolation, and when LOTO is required.
- Audit regularly: Inspect hasps for wear; confirm procedures and sign-offs are followed.
- Update procedures: Reflect equipment changes, alternative methods, and new risk assessments.
Quick FAQ
How many locks fit on a hasp? Commonly 6; extended styles support 8–12 for larger crews.
When should I use a group lock box? When multiple isolation points exist—locks go on each point, then keys are secured in a lock box that every worker locks.
Steel vs. nylon? Use steel/aluminum for durability and heat; use non-conductive nylon for electrical work.
Build Your LOTO Kit
Hasps & Tags
Scissor, clamp, non-conductive and high-vis options to fit any isolation point.
Safety Padlocks
Non-conductive bodies, unique keys, engraving, and color coding.
Stations & Group Lock Boxes
Wall stations and lock boxes to manage multi-point, multi-person lockout.
Reminder: Ensure every authorized employee applies their own lock to the hasp. Equipment should remain in a zero-energy state until all locks are removed.