Fasteners 101: A Complete Guide to Finishing Nails

Finishing nails are an essential component for carpenters, framers, and finishers alike. Unlike coil or stick nails, finishing nails are designed to leave a cleaner, more refined appearance, making them the preferred choice for trim and delicate woodwork. This guide will help you understand the different types and gauges of finishing nails, their applications, and how to select the right fastener for your job.

What Are Finishing Nails?

Finishing nails are collated nails with smaller heads than traditional loose nails, allowing for a cleaner finish that minimizes visible nail marks. These nails are categorized by gauge- the thickness of the steel- where a smaller gauge number indicates a thicker nail.

At Bissett Fasteners, we offer finishing nails in gauges 15, 16, 18, 21, and 23 to cover a wide range of applications.

Understanding Finishing Nail Gauges and Their Uses

15 and 16 Gauge Finishing Nails

• Thickness & Strength: These thicker nails resemble traditional finishing nails and are ideal for fastening heavier trim or structural indoor and outdoor applications.
• Types of 15 Gauge Nails:
  • FN Nails: Rectangular head, collated at a 25° angle, compatible exclusively with Bostitch FN nail guns.
  • DA Nails: Rounded head, collated at a 34° angle, designed for most other brands of nail guns.
    Important: FN and DA nails are not interchangeable, and using the wrong type can cause gun jams.
• 16 Gauge Nails: Available in both angled and straight magazine collations. The straight magazine type remains the most popular, offered in seven lengths from 1 inch to 2½ inches.

18 Gauge Brad Nails

The most popular finishing nail, the 18 gauge brad is versatile for both professional and DIY users.

• Available in 11 sizes ranging from ½ inch to 2 inches.
• Offered in electro-galvanized and stainless steel options.
• Stainless steel packs are available in 1,000 and 5,000 counts.
• Broad compatibility with various nail guns and tools.

21 Gauge Brad Nails

Primarily favored by finishing professionals, 21 gauge nails provide precision and a high-quality finish, ideal for detailed woodwork.

23 Gauge Headless Pins

• These fine pins leave the cleanest possible finish since they are headless.
• Offered in 10 different sizes from ½ inch to 2 inches long.
• Caution: Using longer pins in harder materials increases risk of bending or failure.

Finishing Nails Coatings and Outdoor Use

• Electro-Galvanized Coating: Offers minimal rust protection; not recommended for outdoor or moisture-exposed applications.
• Stainless Steel Finishing Nails: Recommended for exterior use due to superior corrosion resistance.

How to Choose the Right Finishing Nail

Selecting the correct finishing nail depends on the application, wood type, and nail gun compatibility. To avoid costly mistakes like gun jams or weak fastening:

• Use heavier gauges (15, 16) for thick or outdoor trim.
• Use lighter gauges (18, 21, 23) for fine indoor trim to prevent splitting.
• Always check compatibility with your nail gun using the Bissett Fastener Finder.

Where to Buy Bissett Finishing Nails

Looking to purchase Bissett finishing nails locally? Contact us or visit our website to find the nearest building supply store carrying our products.

Safety Reminder

Always wear appropriate Personal Protective Equipment (PPE) when operating nail guns or any pressurized tools. Safety on the jobsite is paramount.

Final Thoughts

From heavier gauge nails for structural trim to ultra-fine headless pins for detailed finishing, Bissett Fasteners has the right nail for your project. For compatibility, availability, and expert advice, trust Bissett- Canada’s trusted source for professional-grade fasteners.