Metallics HG3132 31/32 x 1-1/2 Hole Grommet Vyl

The HG3132 is a 31/32 x 1-1/2 inch hole grommet. The 31/32 inch figure is the hole size it seats into, and 1-1/2 inches is the overall outside dimension, so you need roughly a one inch knockout or drilled opening with about 1-1/2 inches of clear flat surface around it for the flange to seat.

If the opening has a raw or sharp edge and conductors pass through it, yes, something has to protect the insulation. A vinyl grommet like the Metallics HG3132 snaps into the hole and gives the wire a rounded bearing surface. For the 31/32 inch opening size, that is what this one covers. If you need the wire mechanically secured rather than just protected, you want a connector or bushing with a clamp instead of a grommet.

Order Metallics HG3132. That is the manufacturer part number for the 31/32 x 1-1/2 vinyl hole grommet, and it is the only configuration under that number, so there is no size or color option to specify.

It is an electrical item, sold as part of Metallics' electrical supplies line, and the intended use is lining knockouts and drilled holes in boxes, panels and sheet metal where wire passes through.