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Master Lock 427 Lockout hasp
CAH427
$26.45
This item is not stocked: allow 5 to 7 days for delivery.
Master Lock 427 red snap-on lockout hasp in anodized aluminum and stainless steel. Its spring-loaded locking arm is applied with one hand and fits more lockout points than a rivet-hinge labeled hasp. It accepts up to 5 padlocks. Its high-visibility permanent labels, in English, French and Spanish, can be written on to identify the person in charge, then erased for the next job. Sold individually.
Return conditions:
No returnable if used. For more information about our return policy, please refer to the Orders and Returns.
Master Lock 427 Lockout hasp
This item is not stocked: allow 5 to 7 days for delivery.
Master Lock model: 427. This hasp combines multiple-person lockout and tag identification in a single accessory. Its spring-loaded locking arm snaps onto the lockout point, and its anodized aluminum and stainless steel construction combines corrosion resistance and strength. Up to 5 workers apply their padlocks: the equipment stays locked until the last one is removed.
The hasp accepts up to five padlocks, with a maximum 9/32 in shackle according to Master Lock. The geometric hole diameter does not replace this compatibility limit. Energy isolation and verification remain essential.
Design of the snap-on hasp
- Spring-loaded locking arm that snaps on for quick application.
- Fits more lockout points than rivet-hinge labeled hasps, according to the manufacturer.
- Anodized aluminum and stainless steel: corrosion resistance and strength.
- Up to 5 padlocks.
- High-visibility permanent labels in English, French and Spanish, write-on and erasable.
- Red, sold individually.
| Feature | Detail |
|---|---|
| Manufacturer | Master Lock |
| Model | 427 |
| Materials | Anodized aluminum and stainless steel |
| Mechanism | Spring-loaded locking arm, snap-on |
| Number of padlocks | Up to 5 |
| Height | 7.03 in (178.5 mm) |
| Maximum width | 2.87 in (73 mm) |
| Maximum depth | 0.51 in (13.06 mm) |
| Lockout hole diameter | 0.33 in (8.3 mm) |
| Weight | 0.36 lb (162.6 g) |
| Labels | Permanent, write-on and erasable, in English, French and Spanish |
| Colour | Red |
| Sold by | Unit |
Applications of the snap-on hasp
The Master Lock 427 is used whenever several workers service the same equipment: electricians and mechanics on a machine, a maintenance crew on a disconnect, contractors and employees on a valve. Its trilingual labels suit workplaces where French, English and Spanish speakers work side by side. The name of the person in charge is written on it, then erased for the next job.
Installing and inspecting the snap-on hasp
After shutting down the equipment and isolating the energy source, snap the hasp onto the lockout point of the energy-isolating device. Each worker applies a padlock and the person in charge writes his or her name on the label. The hasp is removed only once the last padlock has been taken off; then erase the writing for the next job. Replace a hasp whose spring no longer closes the arm.
FAQ about the snap-on hasp
How many padlocks can be applied to the hasp?
Up to 5 padlocks, one per worker.
What does snap-on mean?
The spring-loaded locking arm closes onto the lockout point in a single motion, with no complicated handling.
What languages are the labels in?
English, French and Spanish. They are permanent, highly visible and can be written on, then erased.
What is it made of?
Anodized aluminum and stainless steel, to combine corrosion resistance and strength.
What is the delivery time?
This item is not stocked: allow 5 to 7 days for delivery.
Suggestions for the snap-on hasp
Based on task-specific risks, consider 3M Centurion 454 splash goggles (YG454), SuperiorTouch nylon knit gloves (GS13GPU) with polyurethane coating, a 3M SecureFit safety hardhat (RH701SFRUV), a black Pioneer 7729 ARC 2 arc-rated vest (V7729) and 3M E-A-R 25 dB push-to-fit earplugs (OA2100). PPE selection depends on hazards and the procedure; the listed items do not authorize energized work.
Under “Accessories” at the bottom of the page. Looking for complementary equipment? Consider the padlock (CA1ARG) by American Lock with keyed-different operation and a red aluminum body, the labels (CAET2) in plastic with French do-not-start wording, in a pack of 5, and the lockout (CACV2) by Brady with an 8 ft nylon cable. Verify compatibility with the installation and site procedure.
CAH427
Data sheet
- Product group
- Safety equipment
- Main category
- Industrial accessories
- Sub category
- Locking and lockout
- Name of the product
- Hasp (locking clip)
- Product code
- CAH427
- Sort by keywords
- Hasps
- Product use
- Locking energy-isolating devices during lockout
- Manufacturer
- Master Lock
- Country of origin
- United States of America
- Features
- Accepts up to 5 padlocks
- Additional Features
- Spring-loaded snap-on locking arm; labels in French, English and Spanish.
- Property of the material
- Writable area
- Material1
- Aluminium
- Material2
- Stainless steel
- Length (in/cm)
- 2.87 in / 7.3 cm
- Width (in/cm)
- 0.5 in / 1.27 cm
- Height (in/cm)
- 7.03 in / 17.9 cm
- Weight (lb/kg)
- 0.36 lb / 0.16 kg
- Sold by
- Unit
- Color
- Red
- Return conditions
- Not returnable if used. For more information about our return policy, please refer to the "Orders and Returns" link on the home page
- Compatible padlocks
- Padlock shackle up to 9/32 in (7.14 mm)
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This item is not stocked: allow 5 to 7 days for delivery.
Master Lock 427 red snap-on lockout hasp in anodized aluminum and stainless steel. Its spring-loaded locking arm is applied with one hand and fits more lockout points than a rivet-hinge labeled hasp. It accepts up to 5 padlocks. Its high-visibility permanent labels, in English, French and Spanish, can be written on to identify the person in charge, then erased for the next job. Sold individually.