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UBS 4-in Polymer Porch Post Plinth 17004

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4.5

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Mon, Oct 5

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Quick-mount porch post fastener, provides ventilating moisture barrier between post and ground. Securely fastens to top and bottom of post in seconds.

Provides a ventilating moisture barrier between post and ground
Securely fastens top and bottom of post in seconds
Prevents water damage, increasing life of post by years
Fits 4-in nominal (3-3/8-in x 3-3/8-in) porch post
Easy installation with common woodworking tools

Dimensions
Size - Measurement (Inches)	3.38	Fits Common Size	4-in

Features
Use	Interior/Exterior

Certifications
CA Residents: Prop 65 Warning(s)	No

Warranty
Warranty	None

General
Material	Polymer	Part Name	17004

Miscellaneous
UNSPSC	30161900

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Review

4.5 out of 5

65 Reviews

94% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise the ease of installation and effectiveness at preventing wood rot by elevating posts off concrete surfaces. Most highlight quick setup requiring no specialized skills, with many noting installation takes roughly ten minutes. Reviewers credit the bracket with extending post life, with some reporting ten years without decay and describing it as creating a protective vapor barrier. A small group expresses concerns about plastic durability, particularly the center locking mechanism breaking under pressure during installation. Despite minor issues with documentation and sourcing replacement parts, most customers consider it essential for long-term structural protection.

Customer review summary generated by AI, including incentivized reviews.

65 Customer Reviews

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Would Recommend

arrived on time in good shape

ValiSeptember 23, 2026
From 6-in Polymer Porch Post Plinth 17006 Verified Purchaser

Was this Review Helpful ?

Nice product

Easy to use. A must to protect the bottom of your wooden post.

WaynoHSeptember 22, 2026
From 5-in Polymer Porch Post Plinth 17005 Verified Purchaser

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works perfectly

Would Recommend

product worked as described

The HandymanJune 22, 2026
Verified Purchaser

Was this Review Helpful ?

additional parts needed

This is just a plate we needed to fasten the posts

MaddieApril 24, 2026
From 6-in Polymer Porch Post Plinth 17006 Verified Purchaser

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		Name	Current Item UBS4-in Polymer Porch Post Plinth 17004
		Ratings	65
		CA Residents: Prop 65 Warning(s)
		UNSPSC	30161900
		Material	Polymer
UBS5-in Polymer Porch Post Plinth 17005	Turncraft4-in Composite Porch Post Plinth Post Saver	UBS6-in Polymer Porch Post Plinth 17006	Turncraft5-in Composite Porch Post Plinth Post Saver	Turncraft6-in Composite Porch Post Plinth Post Saver	PATIKIL6Pcs Flag Swivel Snap Clips 3.9 Inch Heavy Duty Alloy Flag Pole Snaps Hooks Stainless Flagpole Accessories for Rope Hardware Key Chain Leash Leather Craft Silver Tone
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30161900	30161900	30161900	30161900	30161900	30161900
Polymer	Composite	Polymer	Composite	Composite