The nVent HOFFMAN AS056MLG is a reliable Hol-Sealers hole seal accessory designed to close unused pushbutton holes, conduit openings and knockout openings in electrical enclosures. As part of the nVent HOFFMAN Hol-Sealers range, it helps maintain enclosure integrity by protecting against dust, dirt, oil and water ingress.
Manufactured from durable mild steel with a light grey RAL 7035 powder-coated finish, the AS056MLG provides a neat and professional solution for sealing unused enclosure openings. The compact design allows easy installation while helping preserve the enclosure protection rating.
Designed for M16 / micro enclosure openings, the nVent HOFFMAN AS056MLG supports sealing applications with a maximum hole diameter of 14 mm and is suitable for industrial electrical cabinets, automation panels and control equipment.
Key Advantages
Provides a simple solution for sealing unused enclosure openings.
Helps protect against dust, dirt, oil and water ingress.
Mild steel construction provides durability and mechanical strength.
Light grey finish matches modern electrical enclosure installations.
Suitable for maintaining enclosure protection levels after modifications.
Designed by nVent HOFFMAN for industrial enclosure systems.
Key Features
nVent HOFFMAN Hol-Sealers hole seal series.
Model: AS056MLG.
Material: Mild steel.
Finish: Powder coated.
Colour: Light grey RAL 7035.
Maximum hole diameter: 14 mm.
Hol-Sealer diameter: 20 mm.
Includes oil-resistant gasket for improved sealing performance.
Suitable for enclosure walls up to 8 mm thick.
Reliable Enclosure Protection and Finishing Solution
Hole seals such as the nVent HOFFMAN AS056MLG provide an effective method for completing enclosure installations after drilling, modification or unused knockout points. By sealing unused openings, they help maintain protection against environmental contaminants and improve installation quality.
The nVent HOFFMAN Hol-Sealers range is designed for electrical engineers, panel builders and installers requiring dependable accessories for adapting and protecting industrial enclosure systems.
IP66 when installed correctly in a suitable enclosure
Frequently Asked Questions
What is the nVent HOFFMAN AS056MLG used for?
The AS056MLG is a hole seal accessory used to close unused pushbutton holes, conduit openings and knockout openings in electrical enclosures.
What size hole does the AS056MLG seal?
The AS056MLG seals openings with a maximum hole diameter of 14 mm.
What material is the AS056MLG made from?
The hole seal is manufactured from mild steel with a light grey powder-coated finish.
What protection rating can the AS056MLG help maintain?
When correctly installed in a suitable nVent HOFFMAN enclosure, the hole seal helps maintain enclosure protection levels including IP66 applications.
Where is the AS056MLG typically installed?
The AS056MLG is typically installed in industrial control cabinets, electrical panels and automation enclosures.
Trusted by Industrial Enclosure Professionals
nVent HOFFMAN Hol-Sealers are widely used by electrical engineers and panel builders to complete enclosure modifications while maintaining reliable protection and professional installation standards.
Country of Manufacture
United States
Manufacturer
nVent HOFFMAN
Series
AS0 / Hol-Sealers
Model
AS056MLG
Product type
Hole seal
Material
Mild steel
Finish
Powder coated
Colour
Light grey RAL 7035
Hole diameter
14 mm maximum
Seal diameter
20 mm
Thickness
1.5 mm
Protection rating
IP66 when installed correctly in a suitable enclosure
No documents available for this product.
Delivery
We offer fast UK delivery on all stocked items. Orders placed before 3pm Monday to Friday are eligible for next-day delivery.
Standard delivery: 2–3 working days
Next-day delivery: available on in-stock items when ordered before 3pm
Express options available — contact us for details
Returns
If you need to return an item, please contact our sales team within 30 days of receipt. Items must be returned unused in their original packaging.
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
Priority sourcing and supply support
Flexible payment terms for qualifying organisations
Support for engineering, maintenance, and operations
500 +
Stock lines ready to ship
1,000 +
Same day dispatches
3500 +
Customers supported
28
Trusted Manfacturers
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Common questions about our products and support
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
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We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...