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Granatex solid surface filler products are now
Marshall Gruber Company product.

View Granatex products on the
Marshall Gruber website at

These products continue to be available
from Gruber Systems as well.
Products | Supplies | Lavatory Bowl Setup
Captive Nut Assembly Print

A real time saver, Gruber Captive Nut Assembly fits directly onto the modular bowl mold. Then, an eye bolt fits through the polydome and screws directly into the captive nut holding the polydome securely in place. This eliminates the need to bend over and reach under the mold to hold the bolt while you tighten down on the wingnut above the polydome.

The Captive Nut portion of the assembly, once tightened into place, becomes an integral part of the mold. Simple.

Because this assembly is permanently affixed to the drain end of the mold, there is no need for a stem assembly. The polydome attaches with an eyebolt for easy removal. Time and materials are saved for a more efficient production process.

We've got plenty in stock, so call and order a supply.

Order Information (Assembly)
Captive Nut Assembly - Ea - #01131

Order Information (Components)
Bolt Only for Captive Nut Assembly (Ea) - #011311
Jam Nut Only for Captive Nut Assembly (Ea) - #0113212
5/16" Flat Washer Only for Captive Nut Assembly (Per Lb) - #0113213
Lock Washer Only for Captive Nut Assembly (Ea) - #0113214

See Drain Boss with Captive Nut Assembly Included here