HOFFMAN AS050 Conduit Hole Seal 0.87 In Steel

Conduit hole seal for 0.87 inch openings

The Hoffman AS050 is a steel plug designed to close unused pushbutton or conduit holes in electrical enclosures. It fits a hole diameter of 0.87 in and corresponds to a 0.5 in conduit size. The component maintains the integrity of the box by preventing dust, moisture or debris from entering through open knockouts. It is a new replacement part supplied by NVENT HOFFMAN.

Suited for panel builders closing standard knockouts

This seal suits electricians and panel builders who need to blank off a 0.87 in hole left by a removed pushbutton or 0.5 in conduit fitting. It is not for users who need to pass cables through the opening, nor for applications requiring a non-metallic or hazardous-location rated plug. Buyers looking to seal larger or smaller diameter holes will need a different size.

0.87 inch hole diameter is the critical fit

The single specification that decides compatibility is the 0.87 in hole diameter. The seal is manufactured to snap into or cover this exact opening. If the enclosure knockout or drilled hole measures a different diameter, the part will not seat correctly and the enclosure rating will be compromised. Verify the hole size before ordering.