Prime-Line 5/16 X 5 Inch Hex Lag Screws – A307 Grade A Zinc Plated Steel, 25-Pack For Heavy-Duty Wood Framing, Decks & Structural Projects

About This Product

These lag screws are the heavy hitters of the wood screw world.
When you're building a deck, a pergola, or anything that needs serious load-bearing strength, these 5/16-inch by 5-inch screws are what you reach for.
They've got a six-sided hex head, which means you can crank them in with a wrench or socket with way more torque than a Phillips head can handle.

Unlike standard bolts, lag screws don't need a nut on the other end – they're basically thick wood screws with aggressive threads that bite deep into wood.
Just drill a proper pilot hole first (don't skip that step), then drive 'em in.

You get 25 pieces in this pack from Prime-Line – enough for a decent-sized project.

These aren't for hanging a picture frame – they're for serious work.

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