U Shims

Plastic U shims are lightweight, durable shims designed to fit around bolts, anchors, and fasteners for accurate leveling, spacing, and alignment. Commonly used for window installation, curtain walls, glazing, precast, tilt-up, and glass applications, U-shaped plastic shims help installers make precise adjustments without removing hardware.

Tanner’s plastic U shims are available in multiple sizes and color-coded thicknesses for fast identification on the jobsite. Their rounded shape provides flexibility during alignment with no protruding corners, and the plastic construction will not rot like wood shims or rust like metal shims.

U-Shaped Plastic Shims for Windows, Curtain Walls & Anchor Alignment

Plastic U Shim Features

Typically withstanding ten tons of compressed force, lightweight plastic U-shaped shims are designed to fit around bolts and anchors.
Often used for aligning windows and curtain walls.
The rounded shape allows greater flexibility in aligning the plastic U shims with no protruding corners.
Offered in eight sizes as well as four color-coded thicknesses. Ideal for the Precast, Tilt-Up, and Glass industries.

All of our plastic shims are made from high-quality plastic.
Our wide variety of color-coded shims and solid thicknesses are easily applied for easy alignment every time.
Plastic shims won’t rot like wooden shims and won’t rust like metal shims.

SKU	Product Type	Width	Length	Thickness	Bolt Hole	Pieces Per Unit	Price
SHIM SPREADER						500/Box	$83.53
SHIM US14HS	U Shims	1-1/2"	2"	1/4"	1/2"	1000/Box	$69.90
SHIM US16HS	U Shims	1-1/2"	2"	1/16"	1/2"	1000/Box	$34.55
SHIM US18HS	U Shims	1-1/2"	2"	1/8"	1/2"	1000/Box	$41.10
SHIM US23HS	U Shims	2-5/16"	3"	3/8"	13/16"	150/DES	$43.30
SHIM US24HS	U Shims	2-5/16"	3"	1/4"	13/16"	500/DES	$74.68
SHIM US26HS	U Shims	2-5/16"	3"	1/16"	13/16"	1000/Box	$47.35
SHIM US28HS	U Shims	2-5/16"	3"	1/8"	13/16"	1000/Box	$69.90
SHIM US32HS	U Shims	1-1/2"	3-1/2"	1/2"	1/2"	150/DES	$59.75
SHIM US33HS	U Shims	1-1/2"	3-1/2"	3/8"	1/2"	500/Box	$85.45
SHIM US34HS	U Shims	1-1/2"	3-1/2"	1/4"	1/2"	1000/Box	$101.00
SHIM US36HS	U Shims	1-1/2"	3-1/2"	1/16"	1/2"	1000/Box	$41.85
SHIM US38HS	U Shims	1-1/2"	3-1/2"	1/8"	1/2"	1000/Box	$69.90

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<div itemscope itemtype="https://schema.org/FAQPage"><h2>Frequently Asked Questions</h2> <table style="width:100%; border-collapse:collapse;"> <tr itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" style="border-bottom:1px solid #000;"> <td style="padding:12px 0;"> <strong itemprop="name">What are U shims used for?</strong> <div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer" style="margin-top:8px;"> <div itemprop="text">U shims are used to level, align, space, and support materials during construction and installation. Their U-shaped design allows them to fit around bolts, anchors, and fasteners, making them useful for windows, curtain walls, glazing, precast, tilt-up, and glass applications.</div> </div> </td> </tr> <tr itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" style="border-bottom:1px solid #000;"> <td style="padding:12px 0;"> <strong itemprop="name">Why use plastic U shims instead of wood shims?</strong> <div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer" style="margin-top:8px;"> <div itemprop="text">Plastic U shims are often preferred because they will not rot like wood shims or rust like metal shims. They also come in consistent sizes and color-coded thicknesses, which helps installers make precise alignment and spacing adjustments.</div> </div> </td> </tr> <tr itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" style="border-bottom:1px solid #000;"> <td style="padding:12px 0;"> <strong itemprop="name">Are U shims used for window and curtain wall installation?</strong> <div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer" style="margin-top:8px;"> <div itemprop="text">Yes. Plastic U shims are commonly used to align windows and curtain walls. Their shape allows them to fit around bolts and anchors while helping installers keep frames, panels, and related materials properly positioned.</div> </div> </td> </tr> <tr itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" style="border-bottom:1px solid #000;"> <td style="padding:12px 0;"> <strong itemprop="name">What is the benefit of the rounded shape on plastic U shims?</strong> <div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer" style="margin-top:8px;"> <div itemprop="text">The rounded shape gives plastic U shims more flexibility during alignment and helps avoid protruding corners. This can make placement easier in window, curtain wall, glazing, and other installation applications.</div> </div> </td> </tr> <tr itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" style="border-bottom:1px solid #000;"> <td style="padding:12px 0;"> <strong itemprop="name">Do plastic U shims come in different thicknesses?</strong> <div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer" style="margin-top:8px;"> <div itemprop="text">Yes. Tanner plastic U shims are available in multiple sizes and color-coded thicknesses, making it easier to choose the right shim for leveling, spacing, and alignment on the jobsite.</div> </div> </td> </tr> </table> </div>