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Silver hex-head lag screws in a clear 25-count package

Prime-Line

Prime-Line 9055040 Hex Lag Screws 18-8 Stainless Steel 25-Pack

SKU CH-0YBE-FYQ3V

Hex-head lag screws in 18-8 stainless steel for heavy-duty wood fastening, 25 per pack

  • TypeStorage
  • Hex head allows higher torque tightening than Phillips screws
  • 18-8 stainless steel resists corrosion in outdoor deck installations
  • 25-pack supplies enough fasteners for large structural projects
  • Lag screw threads cut into wood without requiring nut access
  • Pilot hole requirement ensures secure heavy-load mounting in timber

Heavy-duty deck fasteners

Prime-Line 9055040 Hex Lag Screws are 18-8 stainless steel wood screws built for structural loads on outdoor projects. The hex head accepts high torque so the joint stays tight under vibration and seasonal movement. A 25-pack supplies enough hardware for a typical railing or ledger board job. These are not general-purpose cabinet screws.

Upgrade from Phillips wood screws

Standard wood screws strip under the torque needed for load-bearing connections, especially in dense or treated lumber. The hex drive eliminates cam-out and lets you drive deeper without rounding the recess. Switch when the joint must carry shear weight such as deck framing, pergola posts or heavy gate hinges. Do not use where a through-bolt with a nut is required.

Pilot hole required

A clearance hole matching the shank must be drilled before driving, otherwise the screw will split the timber or snap the head. The threads cut into wood only; they do not accept a nut. Stainless steel is softer than hardened steel so drive slowly with a low-speed impact driver or ratchet to avoid galling. The pack contains no washers or bits.

Highlights

  • Hex head allows higher torque tightening than Phillips screws
  • 18-8 stainless steel resists corrosion in outdoor deck installations
  • 25-pack supplies enough fasteners for large structural projects
  • Lag screw threads cut into wood without requiring nut access
  • Pilot hole requirement ensures secure heavy-load mounting in timber

Specifications

TypeStorage

Questions about this item

What size pilot hole does the 1/4 in. lag screw need?

Drill a pilot hole slightly smaller than the 1/4 in. shank so the coarse threads can bite into the wood without splitting it.

Which tool fits the hex head on these 9055040 screws?

Use a socket or wrench that matches the hex head; it delivers the high torque the design requires without cam-out.

Will the 18-8 stainless steel need replacement on a deck?

The 18-8 alloy resists corrosion in outdoor exposure, so the fasteners typically last the life of the deck boards.

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