Ratings & Reviews for Sigma ProConnex 2-in Zinc-plated steel Knockout Seal Conduit Fittings
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise these plugs for their snug fit into knockout holes, requiring no tools and effectively sealing out pests, dust, and moisture. The snap-in design is consistently described as easy to install and removable for future upgrades. Reviewers highlight the sturdy, zinc-plated steel construction as durable and professional-grade, making them a reliable, affordable solution for closing unused electrical box openings. A few note sizing discrepancies between labeled and actual dimensions, and some mention difficulty installing if holes are slightly misaligned. Overall, most customers consider these an essential, go-to product for both professionals and DIYers.
Customer review summary generated by AI, including incentivized reviews.I did not return as I may need it elsewhere
Would RecommendProduct was what I ordered, but was not a fit. Operator error
From 1_SLASH_2-in Zinc-plated steel Knockout Seal Conduit Fittings Verified Purchaser
Durable and Easy to Use
Would RecommendI am glad to know that an electrical box with an unwanted knockout hole can be effectively plugged using this item. The metal finish is nice and it easily snaps into place. My complaint with this item is that it is only available in a single pack. I was looking for a multi pack of some kind, but was unable to find one. I had to buy five or six of these (individual packs) to make sure I had enough to use. Generally, multi-packs are cheaper per piece, so I was disappointed that that was not a...
From 1_SLASH_2-in Zinc-plated steel Knockout Seal Conduit Fittings Verified Purchaser
usual component for electrical use
usual part for covering vacant holes in electrical boxes to keep out fingers, pests.
From 1_SLASH_2-in Zinc-plated steel Knockout Seal Conduit Fittings Verified Purchaser
hit with hammer
Would Recommendi found the hole cover
From 1_SLASH_2-in Zinc-plated steel Knockout Seal Conduit Fittings Verified Purchaser
Can we agree on a standard size?
Would Not RecommendDidn't fit. Returned it.
From 3_SLASH_4-in Zinc-plated steel Knockout Seal Conduit Fittings Verified Purchaser
Right size? Not as simple as you'd think...
Would Not RecommendNot impressed. So hard to determine what size is needed to plug a standard electrical outlet hole. The hole opening measures 7/8". This looked like the right size (0.5"), but I had to hammer the f()c& out of it to get it to fit in the hole. Even then I'm not sure it this is really going to stay. It would be nice if it would say "fits most standard electrical box knock-outs".
From 1_SLASH_2-in Zinc-plated steel Knockout Seal Conduit Fittings Verified Purchaser
We apologize that this item was not suitable for your project. For this Knockout Seal, we also offer sizes ranging from 1/2 inch to 2 inches, so you ...
Small quantity available
Would RecommendSmall quantity availbility
From 3_SLASH_4-in Zinc-plated steel Knockout Seal Conduit Fittings Verified Purchaser
No Broken Tangs
Would RecommendTangs are not brittle like some that break off. Fit is a little loose as usual for plugs but steel is malleable so a couple tangs can be bent a little to tighten. Like these Sigma plugs.
From 1_SLASH_2-in Zinc-plated steel Knockout Seal Conduit Fittings Verified Purchaser
Electrical part
Would RecommendIt was exactly what we wanted. It is on the bottom shelf. Get an associate to help you; they can find it.
From 1_SLASH_2-in Zinc-plated steel Knockout Seal Conduit Fittings Verified Purchaser
We apologize that this item was not suitable for your project. For this Knockout Seal, we also offer sizes ranging from 1/2 inch to 2 inches, so you ...