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Friday: 6am - 3pm PST

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Round & Square 3.5" Threaded Grate

Quick Overview

These 6" round or 6"x6" square grates will work with most standard Thunderbird Products 3.5" threaded drains. They are made of cast brass and include optional finishes such as polished chrome and oil-rubbed bronze. The options from this grate selection can easily fit into your desired deck or patio style and add a high-quality look to any drain top.

To place an order, please call us at (800) 658-2473 for pricing and availability.
(Part Numbers located in the table below, under Technical Specifications)


  • Our 3.5" threaded grates are designed for use with our BD6-A Series drains
  • 6" round or 6" x 6" square designs, with 2" of threads for adjustment
  • Made out of cast brass
  • Available in the following finishes: brass, oil-rubbed bronze, polished chrome
  • Developed with a standard thread pattern for most 3.5" thread diameter drains

Technical Specifications

Product Drawing No
Installation No
Material No
Part Numbers
A-6RN 6" Round Brass Grate for BD6 Series Drains
A-6RN-CG 6" Round Chrome Grate for BD6 Series Drains
A-6RN-ORB 6" Round Oil Rubbed Bronze Grate for BD6 Series Drains
A-6SQ 6" x 6" Square Brass Grate for BD6 Series Drains
A-6SQ-CG 6" x 6" Square Chrome Grate for BD6 Series Drains
A-6SQ-ORB 6" x 6" Square Oil Rubbed Bronze Grate for BD6 Series Drains

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