IDEAL Industries 30-171 Wire-Nut® Wire Connector, Model 71B® Gray, Carton of 1,000, Pack of 1000

Yes. The IDEAL 30-171 Wire-Nut, model 71B gray, is rated for use in air handling spaces, so it can go in a plenum or return air cavity where many connectors are not permitted.

They are. The 71B Wire-Nut is approved for bonding and grounding applications, so you can use the same connector for your equipment grounding conductor splices as you do for your circuit conductors instead of stocking a separate green grounding nut.

Yes, the 71B is called out as excellent for fine stranded wire applications. The fixed square-wire spring bites into the strands rather than relying on a tapered coil that can let fine strands slip back out, which is why it gets used on luminaire whips and low-voltage control splices as well as solid building wire.

Part 30-171 is a carton of 1,000 gray 71B Wire-Nut connectors, sold as a single pack of 1000. It's a bulk buy for shops, service fleets, and MRO cribs doing repeat device and fixture work, not a contractor pack of a few dozen.

The gray 71B is a general purpose twist-on connector with a refined range that handles the common splice combinations an electrician runs into, so one bin covers most device, switch leg, and fixture splices instead of chasing a separate color for each combination. Check the wire range marked on the connector or carton against the conductors in your box before splicing.

No tool is needed. The 71B has a positive grip shell made to be twisted on with your fingers, which matters when you're splicing overhead in a box or working one-handed in a ceiling. It's the gray Wire-Nut IDEAL has built since 1928.