Mutual Screw & Supply

5/16" X 4-1/2" Hex Head Lag Screws | 316 Stainless Steel (300 / Pkg.)

5/16" X 4-1/2" Hex Head Lag Screws | 316 Stainless Steel (300 / Pkg.) - Main image
$173.98 $285.22 In stock

These 5/16" x 4-1/2" lag screws are manufactured from 316 Stainless Steel for corrosion resistance. They deliver strong holding power for heavy-duty wood-to-wood and structural timber connections.

  • Material and finish: 316 Stainless Steel
  • Size: 5/16" x 4-1/2"
  • Applications: Heavy-duty wood and structural timber connections

Specifications

  • Product type: Lag Screws
  • Head style: Hex
  • Material: 316 Stainless Steel
  • Finish: Plain
  • Diameter: 5/16"
  • Length: 4-1/2"
  • Thread size: 5/16
  • Measurement type: Imperial
  • Pack quantity: 300 per package
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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

John N. ★★★★★

Used these for a deck railing project in a coastal area, the 316 stainless steel is already proving its worth against the salt air. Each screw bites into the wood cleanly with a pre-drilled hole, and the hex head grips the socket securely without stripping.

James C. ★★★★★

These were used to tie our pergola beams to the posts and they sunk in straight without any stripping. The 316 stainless finish gives me real peace of mind for coastal weather, and the box of 300 is enough for a whole project plus spares.

Jason ★★★★★

Went through a whole box building a dock in saltwater, and not a single one showed any rust after six months. The 316 stainless really holds up better than the standard ones I used before.