Metallics BTJ3SS Anchor 3/8-16 x 3-3/4 J-Blt 18-8 SS (Jar 10)

The BTJ3SS is a 3/8-16 J-bolt measuring 3-3/4 inches, so it takes a standard 3/8-16 UNC nut and washer. The 3-3/4 inch figure is the bolt dimension, and the hooked J end is what anchors into poured concrete or wraps a rod or structural member, leaving the threaded leg exposed for the nut.

It's 18-8 stainless steel, the common austenitic grade used for general corrosion resistance, which makes it suitable for exterior and damp interior work where a plain or zinc plated J-bolt would rust. For chloride heavy environments like coastal splash or pool chemical rooms, 316 stainless is the step up from 18-8.

Ten per jar. That's the package quantity, so an electrician hanging strut or a pipe rack ordering by the jar gets 10 bolts per unit and should order nuts and washers separately, since they are not included with the bolts.

A J-bolt is a hooked anchor bolt: the J end is embedded in wet concrete or hooked around steel, and the threaded end sticks out to receive a nut. On electrical work that's typically anchoring equipment pads, transformer and generator bases, strut and channel supports, or hanging conduit racks. Since the BTJ3SS is 18-8 stainless, it's the choice where the anchor will see moisture. If you're fastening into already cured concrete instead, a wedge anchor or sleeve anchor is the correct part, not a J-bolt.

Yes, for supports sized to 3/8 inch hardware. 3/8-16 is the standard thread on strut nuts, rod couplings, and most channel hardware, so the BTJ3SS threads straight into that system, and the 3-3/4 inch length gives you the hook plus enough thread for a nut and washer. Check your embedment or hook-around requirement against that 3-3/4 inch overall before committing, because a deeper embedment needs a longer bolt.