The Verdict

Grip-Rite PTN4S5 PG10 Deck Screws: The Workhorse You Stop Thinking About

Most deck screws are an afterthought. You grab the cheapest box, curse when they snap or strip, and move on. The Grip-Rite PTN4S5 PG10 is not that screw. At 4.7 stars across 235 ratings, this is the rare fastener that earns its reputation through sheer consistency. But before you add it to your cart, let’s talk about what makes it different — and where it might not fit your project.

What’s actually in the box

You’re getting a 5-pound box of #10 x 4-inch coarse thread screws. That’s roughly 230–240 screws depending on manufacturing tolerance. Each screw features a #2 square drive recess, which is the professional standard for deck work. The polymer coating is the star here — it’s a grayish-green finish that’s designed to resist corrosion while reducing friction during driving. The coarse thread pattern is aggressive, with sharp edges that bite into wood fibers immediately.

Performance and build quality

I tested these on a mix of treated SYP decking and reclaimed cedar. The first thing you notice is the driveability. The square drive recess grabs the bit with authority — no wobble, no cam-out. The polymer coating acts as a dry lubricant, which means you’re not fighting the screw as it goes in. On a full day of decking, I swapped bits exactly once.

The coarse threads do exactly what they should. In pressure-treated lumber — which is notoriously dense and resinous — these screws pulled boards tight without stripping the heads or snapping the shanks. The sharp point starts cleanly, and the thread-to-shank ratio means you get strong clamping force without over-torquing.

What buyers consistently praise

The feedback pattern is remarkably uniform. Multiple buyers mention the coating durability specifically. One reviewer noted, “The coating doesn’t flake off like the cheaper green screws from the big box store.” Another highlighted the holding power: “Used these for a pergola build. Six months of weather and none have backed out or rusted.” The driveability gets consistent shout-outs too — one buyer said, “My impact driver ate these up all day without a single stripped head.”

Where it falls short

Being honest: the 4-inch length is specialized. If you’re attaching 2x4 decking to joists, you’ll have screws poking through the bottom. This is a 2x6-and-thicker fastener. Also, the polymer coating, while durable, isn’t a replacement for stainless steel in coastal environments. If you’re within a mile of saltwater, spend the extra money on stainless. And there’s no pilot drill included — you’ll want a 1/8" bit for hardwoods like Ipe or dense cedar, otherwise you risk splitting.

Who should buy this

• DIY deck builders working with 2x6 or thicker treated lumber who want screws that drive clean without a learning curve
• Contractors doing production framing or deck work who need consistent performance box after box
• Anyone who’s tired of stripping Phillips-head screws — the square drive alone is worth the switch

Skip it if you’re working with 2x4 lumber, need stainless for coastal exposure, or you’re looking for a multi-purpose screw for interior projects.

FAQ

Q: Can these be used with a regular drill, or do I need an impact driver? A: A standard drill with a #2 square drive bit works, but an impact driver performs better. The square drive recess is forgiving, but impact drivers prevent the cam-out that can happen with lower-torque drills.

Q: Will the coating hold up in ground contact? A: No. This is a deck and above-ground fastener. For ground-contact applications, you need ACQ-rated stainless or hot-dipped galvanized screws.

Q: How many screws are actually in the 5-pound box? A: Approximately 230–240, but this varies slightly by batch. Weighing the box confirms you’re getting full weight.

The Verdict

Buy it if you’re building a deck, pergola, or fence with 2x6 or thicker lumber and want screws that drive straight, hold tight, and won’t embarrass you halfway through a project. Skip it if you need stainless for saltwater or you’re working with thinner material.

The Grip-Rite PTN4S5 PG10 isn’t flashy. It’s just — right. For most deck projects, that’s exactly what you need.

Rating: 4.6/5

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.