








Simpson Strong-Tie MPB66Z MPBZ ZMAX Galvanized Moment Post Base for 6x6 w/SDS Screws
Key specs
Full details ↓- Internal tabs provide the code-required 1 in. post standoff to help protect wood from rot caused by standin...
- Stamped indicators and internal tabs identify the required concrete embedment depth for accurate positionin...
- Strategically placed holes allow template attachment to simplify installation.
- Optional obround holes provide attachment points for trim material.
Key specs
Full details ↓- Internal tabs provide the code-required 1 in. post standoff to help protect wood from rot caused by standin...
- Stamped indicators and internal tabs identify the required concrete embedment depth for accurate positionin...
- Strategically placed holes allow template attachment to simplify installation.
- Optional obround holes provide attachment points for trim material.
MPB66Z · MPBZ series
- Finish ZMAX
- Sold individually
ZMAX (G185) galvanized – rated for treated lumber and outdoor use
More Simpson post bases & caps →Fasteners
Simpson rates each connector with specific nails or screws (see the fastener schedule on the spec sheet). Most hangers and ties take Strong-Drive SD connector screws as a listed alternative to 10d/16d nails. Fasteners are sold separately.
Manufacturer documents
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The Simpson Strong-Tie MPB66Z is a ZMAX galvanized moment post base designed for 6x6 posts. It provides a post-to-concrete connection with features that support proper installation, moisture management, and attachment of trim material.
Key features
- Internal tabs provide the code-required 1 in. post standoff to help protect wood from rot caused by standing water and ground moisture.
- Stamped indicators and internal tabs identify the required concrete embedment depth for accurate positioning during installation.
- Strategically placed holes allow template attachment to simplify installation.
- Optional obround holes provide attachment points for trim material.
- Additional holes at the embedment line allow standing water to drain and provide a visual inspection point.
- ZMAX galvanized construction provides a protective finish for the post base.
Specifications
- Brand: Simpson Strong-Tie
- Model: MPB66Z
- UPC: 707392343783
- Category: Post/Column Bases & Caps
- Package weight: 11.09 lb
- Package dimensions: 16.1 x 6.9 x 6.9 in
Compatibility and notes
- Includes SDS screws for installation.
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- Tabs inside the MPBZ provide the code-required 1 in. post standoff to help prevent rot from standing water and ground moisture
- Stamped indicators and internal tabs identify the required concrete embedment depth
- Strategically placed holes simplify installation to allow template attachment
- Optional obround holes have been added for attaching trim material
- Additional holes at the embedment line allow standing water to exit and a point of visual inspection
Significant Services Inc. is an independent retailer, not the manufacturer. All products are new unless otherwise specified. Brand names and trademarks belong to their respective owners, and unless stated otherwise we are not affiliated with or endorsed by the manufacturer.
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Order by 2:30 PM ET, Monday–Friday, and it leaves our Pompano Beach, FL warehouse the same business day.
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Every order, no minimum, via USPS, UPS or FedEx. Most orders arrive in 1–5 business days.
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Significant Services Inc.
1580 NW 27th Ave, Ste 12, Pompano Beach, FL 33069
Support: Monday–Friday, 9:00 AM–5:00 PM ET · 954-932-6568 · support@significantservices.com
Significant Services is an independent retailer. Brand names and trademarks belong to their respective owners, and unless stated otherwise we are not affiliated with or endorsed by the manufacturers whose products we sell.

