Pins, Brads or Trim Nails: What’s the Difference?... Read More
Unlike screws, nails use a counterintuitive gauging system whereby the larger the number, the smaller the fastener. A 23-gauge pin is 0.025 in. in diameter, an 18-gauge brad is 0.041 in. in diameter with a 0.075 in. head, and a 15-gauge trim nail is 0.072 in. in diameter with a 0.10 in. head. Collated pins and brads are generally square in cross-section for easier collation and to reduce feeding problems. Pins are headless and are generally used for very light assembly or to position things while an adhesive dry. However, installing crown molding and baseboards with a 23-gauge pin is becoming more common. Brads have small heads and are generally used to fabricate built-up moldings or for light assembly. Trim nails have a larger head than brads, usually "D" shaped or clipped, and are used for more structural applications, such as trimming doors or windows.