15-gauge vs 16-gauge vs 18-gauge?

18-gauge brads for thin trim and small molding. 16-gauge for most trim work. 15-gauge for heavy trim, thick casings, and where maximum hold is needed.

Do I need a specific nailer for each gauge?

Yes, each gauge requires its own nailer - they are not interchangeable.

Finish Nails

Hardware & Fasteners

Nails

Budget: $5-$10/pack 1000 ct (18-gauge brads) | Mid-range: $10-$20/pack 1000 ct (16-gauge finish) | Premium: $15-$30/pack (15-gauge or stainless)

Finish Nails: Brad & Finish Nails for Trim & Millwork (2026)

Prepared by Lumberama's Building Materials Team

|Last updated May 25, 2026|Sources & methodology

Finish nails are thin-gauge nails designed for trim work, molding, cabinetry, and other finish carpentry where appearance matters. They leave small holes that are easily filled. Available in 15-gauge (finish), 16-gauge (finish), and 18-gauge (brad) sizes for use with pneumatic or cordless nailers.

Key Features

Small head for minimal visibility; 15
16
and 18 gauge options; Lengths from 5/8" to 2-1/2"; Angled and straight magazine styles; Galvanized and stainless options

Specifications

15-gauge: 1" to 2-1/2" (angled) | 16-gauge: 1" to 2-1/2" (straight) | 18-gauge brad: 5/8" to 2" | Material: steel

galvanized

stainless | Magazine: 15° angled or straight

Applications

Baseboard and crown molding installation; Door and window casing; Cabinet face frame assembly; Chair rail and wainscoting; Decorative trim attachment

Installation Overview

Load collated strips into finish nailer magazine. Position nailer on trim surface and fire. Set nail slightly below surface. Fill holes with matching wood filler or caulk. Sand flush when dry.

Pros & Cons

Pros

✓ Nearly invisible nail holes; Easy to fill and hide; Fast installation with nailer; Excellent holding in trim applications

Cons

✗ Less holding power than framing nails; Require a specific gauge nailer; Small heads can pull through soft wood; Must match gauge to nailer exactly

Top Brands

DEWALT

Hitachi/Metabo HPT

Paslode

Code Requirements

No specific code requirements for finish nails in trim applications. Not rated for structural connections. Use appropriate gauge and length for material thickness.

Buying Tips

18-gauge brads are best for light trim and small moldings; 16-gauge is the most versatile for general trim work; Buy the gauge that matches your nailer and stock up - you will use thousands