The Simpson Strong-Tie Shake and Shingle Siding/Roofing Nail, 1-1/4-in. x .083-in. Type 316, 25 lb. (T3SN7B) is a corrosion-resistant exterior nail for fastening wood siding, shakes, and shingles. This is a siding and roofing nail designed for exterior wood fastening in exposed weather conditions. Model Number: T3SN7B. If you are working on cedar, siding, trim, or coastal exterior work, this nail matters because the fastener is often the part that decides whether the job still looks good years later.

The basic specs are what make it practical on the job. The 1-1/4 in. length and 0.083 in. shank diameter put it in the range for shake, shingle, and siding fastening where you need solid holding power without using an oversized nail that can beat up the material. The annular ring-shank is there for a reason: it increases withdrawal resistance, so boards and shingles stay put better over time. That is especially important on exterior walls and roof areas where movement, moisture, and seasonal changes can work lesser fasteners loose.

Simpson also built this nail to drive cleaner in wood. The slender shank helps minimize splitting, which is a big deal when you are fastening thinner siding pieces or working with materials that can crack at the edges. The diamond point makes hand-driving easier by helping the nail start cleanly instead of skating around. On a repetitive exterior fastening job, details like that save time and reduce frustration.

The head design is worth paying attention to as well. This nail uses a full round, flat head with a 7/32 in. diameter for solid bearing surface on shakes and shingles. The checkered head pattern is not just cosmetic. It helps the head blend better with wood grain, cuts glare from sunlight, and accepts surface finishes more naturally. If the finished look matters, that is a useful detail instead of a throwaway spec.

Material is the real story here. Type 316 stainless steel is the upgrade you buy when the environment is hard on fasteners. It is a smart choice for severe exterior exposure and seaside applications where extra corrosion resistance is needed. If you are putting good money into cedar shakes, premium siding, or other exterior wood products, using the right stainless fastener is the difference between protecting the investment and creating problems later.

This bulk pack is set up for real project volume. The 25 lb. quantity works well for contractors, remodelers, and serious homeowners handling bigger siding or roofing jobs. With approximately 470 nails per pound, you are getting a large-count package intended more for production work than for a one-hour repair. That makes the T3SN7B a better fit for planned installs, replacements, and larger exterior upgrades than for casual patch work.

Who should buy it? This nail makes the most sense for siding installers, roofers working with shakes or shingles, remodelers, builders doing exterior trim and cladding work, and homeowners in coastal or high-moisture regions who do not want to redo a job because the fasteners were the weak link. If you need an exterior wood fastener with strong holding power, reduced splitting, and marine-grade corrosion resistance, this is the right kind of nail to buy once and use with confidence.

Simpson Strong-Tie Shake and Shingle Siding/Roofing Nail That Actually Matches the Job

This is the kind of fastener you buy when you care more about the finished exterior holding up than saving a few bucks on the box.

• Who it's for: Contractors, remodelers, roofers, and serious homeowners doing exterior wood siding, shake, or shingle work, especially in wet or coastal environments.
• Why it stands out: Type 316 stainless steel, ring-shank holding power, a slender shank to help limit splitting, and a checkered head that looks cleaner in finished wood.
• Worth knowing: This is a 25 lb. bulk pack, so it makes the most sense for real project volume rather than a tiny repair. If you are paying for premium exterior materials, this is the right place to not cut corners.

• What is this nail designed for? It is designed for fastening wood siding, shakes, shingles, and related exterior applications.
• Is this a good choice for coastal or seaside jobs? Yes. The Type 316 stainless steel construction is specifically positioned for seaside applications and severe corrosion resistance.
• What helps this nail stay in place? The annular ring-shank increases withdrawal resistance for a more secure attachment.
• Will it be easier on wood than a heavier shank nail? It is built with a slender 0.083 in. shank that helps minimize splitting in wood materials.