

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The ORBIT INDUSTRIES KO-150 is a snap-in knockout seal designed to close unused open knockouts in electrical boxes. It inserts directly into the open hole without requiring removal of box devices, covers, or installed wiring. The seal protects exposed conductors from physical damage and keeps the enclosure code-compliant by eliminating open penetrations. Suitable for standard, air-tight, and dust-tight applications, this knockout seal is a common item carried by electricians for panel work, junction box finishing, and device box rough-in.
The KO-150 is sized for 1-1/2 inch trade size knockout openings, making it appropriate for residential and light commercial electrical enclosures where unused knockouts are present. Electricians use these seals during new construction, remodel work, and service calls to bring boxes into compliance without disassembling the enclosure. Its snap-in design speeds installation in tight spaces where conventional fittings would require additional clearance.
Designed as an OEM-style replacement or supplemental fitting for electrical boxes with 1-1/2 inch trade size knockout openings in standard, air-tight, or dust-tight configurations.
Installation is performed by licensed electricians or qualified personnel. De-energize the circuit and verify with a meter before working inside any enclosure. Align the seal with the knockout opening and press firmly until it snaps into place. Inspect the seated seal to confirm it is flush and fully engaged before closing the enclosure.
Thanks for subscribing!
This email has been registered!