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Box of fifty zinc-plated steel hex lag screws

Prime-Line

Prime-Line 9055515 Hex Lag Screws 50 Pack

SKU CH-MWB6-3F9DQ

Hex-head lag screws in A307 Grade A zinc-plated steel for heavy-load wood fastening, 50 pieces

  • Product typeStorage
  • Heavy-load mounting replaces standard wood screws
  • Hex head accepts higher torque than Phillips drive
  • A307 Grade A zinc-plated steel resists corrosion
  • 50-piece pack covers large deck projects
  • Single-sided install avoids access to opposite end

Heavy-Duty Wood Fasteners

Prime-Line 9055515 Hex Lag Screws come in a 50-pack of A307 Grade A zinc-plated steel. They are built for structural connections where the mounting surface must bear a heavy load. The hex head accepts higher torque than Phillips heads. These are thick wood screws with threads designed to cut into timber, not bolts that accept nuts.

Installation Requirements

A pilot hole is required before driving each screw to prevent splitting and ensure proper thread engagement. The hex head allows installation with a wrench or socket for strong tightening force. Because they are wood screws, they do not accept nuts and cannot be used in through-bolt applications. Access to only one side of the joint is needed, unlike standard hex bolts.

Deck Builders and Timber Framing

This pack suits contractors and DIYers fastening deck ledgers, posts or heavy timber frames where high shear strength is required. Buyers needing fasteners for metal-to-metal joints or applications requiring a nut on the opposite end should look at machine bolts instead. Those seeking smaller screws for light trim work will find these oversized.

How it compares

Measured against everything we stock in Kitchenware & Tableware, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 80% of the 2,144 comparable items (median $20.99).

Specifications

Product
Product typeStorage

Questions about this item

How do I confirm the 9055515 hex lag screws are holding the rated load after installation?

The A307 Grade A zinc plated steel hex head allows higher torque than Phillips screws; a properly drilled pilot hole and full thread engagement in wood indicate the 50 pack fasteners are working as intended.

What comes in the 50 pack box and what must I purchase separately for deck installation?

The box contains 50 hex lag screws; you must buy a matching drill bit for the pilot hole and a hex driver or socket, as no bits or tools are included.

Which grade and finish should I choose for outdoor deck use among the listed options?

The A307 Grade A zinc plated steel version is the one specified for heavy load deck mounting where access to only one side is needed.

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