These hanger bolts are headless bolts designed to hang materials from wooden structures, walls or overhead. One half has a lag thread wood screw with a pointed tip, and the other half has standard machine thread with a blunt tip. Commonly used to hang wiring and ceiling hooks, the assembly is complete when the lag end is screwed into a pre-drilled. The item is threaded or attached on the opposing end and a nut is added. Offered in various materials and finishes.
especially in view of the fact that I have never purchased a pack of Crown Bolt #8-32 X 1-1/2 in. Coarse Plain Steel Hanger Bolts. I can only assume that they are perfectly suitable for their intended task and, should I ever need to hang any sheet metal, I will hunt them out at my local Home Depot.
The Kidde Silhouette is a low profile AC/DC powered, ionization smoke alarm that operates on a 120 volt power source with a sealed rechargeable battery backup. This alarm uses ionization sensing technology. This unit is a UL Listed product with a 10-year limited warranty. This innovative low-profile alarm fits in most common electrical 2-gang and plastic, round boxes with 3-1/2 in. hole spacing.
This Smoke Alarm was very easy to install and has a full set of installation instructions. One slight problem, it does not fit into every 2" electrical box. Some have mounting screw bolt holes in different places. Apart from that, from start to finish the whole installation took around 30 minutes. (Power already in place) Like: The 10 year battery, ease of installation, the ability to link several together. Dislike: The bright green LED power indicator. One in a dark bedroom will light up the room!