24PCS Bolt Nut Protection Cap Black Hexagon Dome Nylon Bolt Nut Protection Cover M8x14 mm

Snugly fits our 14mm lag bolt head (when measured from flat edge to opposite flat edge) despite other reviews. It took some effort to install the caps on the bolt, but also means it will take some effort to get the caps off the bolt, which is ideal for my application. Measurement out of the box doesn’t appear to match the bolt head size, but it stretched to fit when aligned properly with the hex bolt and with significant force applied. We have had these installed for three weeks in high traffic area (stairwell) with none of the caps coming loose or falling off even without using adhesive. Gives our stair brackets a finished look without having to mess with paint or other aesthetic remedies. Very satisfied.

I hated the silver bolt heads securing the gazebo to my trex deck. These were perfect. Very tight fit (just tapped on using a rubber mallet though) and now the hardware blends in perfectly.

I needed one to replace a missing piece on my windshield wiper arm. It did the job but now I have 23 spares.

Works for what I needed

I used these to cover nuts on an outside metal porch railing. These are 14mm (by 8) caps. I used them on 9/16 inch nuts. The caps are made of (I think) nylon so they can “stretch” a bit. I had to use a hammer to get them on but they fit perfect and very tight so they won’t come off. Looks great with the black railing.

The products are of good quality, but they were mislabeled i.e., not the dimensions of the M8x14 Bolt Cap.

They worked great to keep our rabbits from being able to chip their teeth on the steel nuts suspending the cages.

Used on the drivers and passengers seat to cover the bolts mounting the seats to the floor board. Yes, It a truck, but the attention to detail to cover the bolts could have been done at the factory. install was easy. They fit snug so I don't expect them to ever come off by accident. I only needed four. So I have plenty if I do ever need to replace!