Getting the right match comes down to diameter, thread, and length.

• Measure the bolt diameter: Metric sizes are labeled M5, M6, M8, etc. SAE/imperial might be #10, 1/4 in, and so on. Match the nut’s thread size to your bolt’s size—mixing metric and SAE typically won’t fit.
• Check thread pitch: Most furniture hardware uses standard pitches, but if you’re replacing hardware, confirm the pitch or test-fit.
• Consider the grip length: For cross dowels, pick a barrel length close to your panel thickness. For binding posts, make sure the post length accommodates the material stack.

On Walmart.com, you can use filters for size and material. A simple ruler or caliper can help you measure before you buy.

They solve similar problems in different ways:

• Barrel nuts (cross dowels): A cylindrical nut with a threaded hole across the body. You drill a through-hole for a connector bolt and a cross-hole for the barrel, then align the slot to catch the bolt. It’s popular in beds, cabinets, and other furniture where high clamping force is helpful.
• Insert nuts (threaded inserts): Create internal threads in wood or thin material. Many are screw-in, often with a hex drive or slot, and sit flush in a countersunk hole. They’re useful when you need a removable machine-screw connection in panels.

Both can be found in metric and SAE sizes, with different lengths and finishes to match your project.

1. Plan the layout: Choose matching connector bolts and cross dowel size. Mark your through-hole and cross-hole locations.
2. Drill the through-hole: Use the bolt’s diameter as your guide. Keep the holes square by clamping the workpiece.
3. Drill the cross-hole: Size it to the barrel OD and depth. A light chamfer can ease insertion.
4. Insert and align: Slide the barrel nut into the cross-hole and rotate the slot so the internal threads face the through-hole.
5. Join and tighten: Feed the connector bolt, engage the threads, and tighten gradually. Avoid overtightening to reduce the risk of crushing fibers.

Wearing eye protection and test-fitting parts can help you get a cleaner, more reliable assembly.

Material choice affects durability and appearance.

• Stainless steel (e.g., 304): Often preferred in humid or damp areas because it offers stronger corrosion resistance. It’s a good pick for bathrooms, basements, or projects near moisture.
• Zinc-plated carbon steel: Common for dry indoor furniture. It’s budget-friendly and resists light corrosion under normal indoor conditions.
• Zinc alloy or nickel-plated pieces: Suitable for light-duty indoor applications and decorative hardware where aesthetics matter.

Finishes and service conditions vary, so selecting a material that matches your environment can help extend hardware life. If the area sees frequent moisture, a corrosion-resistant option may offer better long-term performance.

You’ll find replacement barrel nuts, cross dowels, connector bolts, and assortments in this category on Walmart.com.

• Match the specs: Measure the thread size (e.g., M6, M8, #10), length, and diameter of your old hardware before ordering.
• Use filters: Sort by size, material, and finish to quickly narrow options.
• Check your assembly: If you’re replacing parts on existing furniture, compare the original manual’s specs when available.

Many items are offered in multi-packs for future spares, and you can choose delivery or store pickup options that fit your schedule. Verifying dimensions up front can help you avoid returns and keep your project moving.