Mutual Screw & Supply

5/16" X 4-1/2" Hex Head Lag Screws | 18/8 Stainless Steel (300 / Pkg.)

5/16" X 4-1/2" Hex Head Lag Screws | 18/8 Stainless Steel (300 / Pkg.) - Main image
$102.03 $159.42 In stock

These 5/16" x 4-1/2" lag screws are manufactured from 18/8 Stainless Steel for corrosion resistance. They deliver strong holding power for heavy-duty wood-to-wood and structural timber connections.

  • Material and finish: 18/8 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: 18/8 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: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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)

William K. ★★★★★

I was worried about finding enough corrosion-resistant fasteners for my outdoor deck project, but these 18/8 stainless steel lag screws arrived in a full 300-count package. They drove in smoothly with a socket wrench and the hex heads grabbed perfectly without stripping. Feels solid knowing these ti

Claire ★★★★★

Installed these on a timber retaining wall and they drove in cleanly without any stripping. The stainless steel heads look great and I’m confident they’ll hold up against the weather.

Timothy K. ★★★★★

Used these for building a heavy-duty garden bench, and the 18/8 stainless steel held up perfectly in the damp weather without a hint of rust. The hex head made driving them into pressure-treated lumber a breeze with my impact driver.