Knurled Brass Inserts for Stainless Steel Bottle Stoppers – 5 Pack | 3/8”-16 Thread

Make your bottle stopper projects stronger, easier to assemble, and easier to remove with these Knurled Brass Inserts for Stainless Steel Bottle Stoppers. Designed for use with 3/8”-16 threaded bottle stopper hardware, honey dippers, and other compatible project kits, these precision-machined brass inserts create a durable threaded connection that protects your wood or acrylic while making assembly and disassembly quick and effortless.

The aggressive knurled exterior provides outstanding holding power when epoxied into your blank, while the precision-cut 3/8”-16 internal threads allow your project to be repeatedly installed and removed without wearing out the material. These inserts are especially recommended for SpectraPly, but they’re equally effective in hardwoods, stabilized woods, acrylics, hybrid blanks, and resin castings.

Each package includes five premium brass inserts manufactured to a true 1/2” outside diameter for consistent, reliable installation.

Features & Highlights

• Package includes 5 brass threaded inserts
• Designed for Stainless Steel Bottle Stopper Kits
• Compatible with Honey Dippers and other 3/8”-16 threaded projects
• Knurled exterior provides exceptional grip when epoxied in place
• True 1/2” outside diameter for accurate installation
• Precision 3/8”-16 internal threads
• Brass construction offers excellent corrosion and rust resistance
• Makes assembly and disassembly fast and easy
• Helps protect delicate materials from thread wear
• Highly recommended for SpectraPly® blanks

Perfect For

Use these inserts with:

• Stainless Steel Bottle Stopper Kits
• Honey Dipper Kits
• Bottle Stopper Mandrel (BSM)
• Universal Mandrel (UM)
• Wood bottle stoppers
• Acrylic bottle stoppers
• Hybrid bottle stopper blanks
• Resin bottle stopper projects

Why Use Brass Inserts?

Installing a brass insert creates a permanent threaded anchor inside your blank, allowing you to easily remove and reinstall your project without damaging the wood or acrylic. This is especially beneficial when sanding, finishing, or making future repairs.

They’re particularly useful when working with SpectraPly, acrylics, resin, and stabilized woods, helping prevent thread wear while providing a stronger, longer-lasting connection between your project and the hardware.

Specifications

Insert Specifications

• Material: Brass
• Outside Diameter: 1/2”
• Length: 5/8”
• Internal Thread: 3/8”-16
• Style: Knurled
• Quantity: 5 Inserts

Installation Instructions

1. Drill a 1/2” diameter hole approximately 3/4”–7/8” deep.
2. Apply a quality two-part epoxy inside the hole.
3. Insert the brass insert while slowly twisting back and forth to evenly distribute the adhesive.
4. Seat the insert slightly below the surface so the finished bottle stopper hardware contacts the wood—not the insert.
5. Allow the epoxy to cure completely before installing your hardware.

Why Choose Stainless Stoppers Brass Inserts?

These precision-machined brass inserts are manufactured specifically for 3/8”-16 bottle stopper hardware, providing a secure, professional-quality installation every time. Their aggressive knurling and corrosion-resistant brass construction create a dependable threaded connection that makes your bottle stopper projects easier to build, easier to finish, and easier to maintain.

Complete Your Bottle Stopper Project

Pair these inserts with our ExoticBlanks Premium Bottle Stopper Kits, Bottle Stopper Mandrels, wood blanks, stabilized woods, premium acrylic blanks, and hybrid casting blanks to create beautiful handcrafted bottle stoppers.