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The HAMMOND HP22 is a 22mm hole plug used to seal unused knockouts and openings in electrical enclosures, junction boxes, and panels. It provides a clean, secure closure that keeps debris, moisture, and pests out of the enclosure interior. Installers use this plug to cap off any pre-punched or field-cut 22mm holes that are not needed for conduit or cable entry. The snap-in design allows for fast, tool-free installation in standard sheet metal enclosures.
This hole plug is suited for residential and commercial electrical installations where unused enclosure openings must be closed off to meet code requirements. Typical applications include panelboards, pull boxes, junction boxes, and control enclosures. Electricians and electrical contractors install this plug during panel assembly or service work whenever a knockout is left unused.
Designed as an OEM-style replacement or supplemental plug for standard 22mm knockout openings in electrical enclosures and junction boxes.
Installation is performed by licensed electricians or qualified electrical contractors. De-energize the enclosure and verify it is locked out before servicing any panel or junction box. Press the plug firmly into the 22mm opening until it seats securely. Verify the closure meets local code requirements under the NEC for unused enclosure openings.
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