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5/16 x 3-1/2 in galvanized carriage bolt kit (50) with washers & nuts

Makers Bolt ★ 3.7/5 · ItemOracle Score Budget

$37 USD
Price subject to change
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5/16" x 3-1/2" (50 Pack) Galvanized Carriage Bolt Kit Grade 307A Includes 5/16" USS Flat Washers (50 pcs) and 5/16"-18 Hex Nuts (50 pcs), Hot Dip Galvanized for Exterior Use by Makers Bolt

Galvanized carriage bolt kit includes 50 bolts, 50 washers, and 50 hex nuts. Hot-dip galvanized for exterior use; suitable for decks and heavy-duty projects. Customer notes mixed sentiment on overall value

Highlights

  • hot dip galvanized exterior rating
  • includes 50 bolts, 50 washers, 50 nuts
  • flat head for semi-flush finish

Pros

  • includes bolts, washers, and nuts
  • hot-dip galvanized coating for exterior use
  • semi-flush flat head design
  • meets multiple ASME and ASTM standards
  • kit size supports large assemblies

Cons

  • customer insights show mixed sentiment
  • no mention of torque specs customization
  • weight or package dimensions not provided

Best For

  • deck construction
  • gazebo framing
  • pergola assembly
  • outdoor furniture builds
  • fence or railing projects
  • heavy-duty timber connections

Features

  • Diameter 5/16 inch and length 3-1/2 inch for each bolt
  • Includes 50 Grade 307A carriage bolts with 50 USS flat washers and 50 hex nuts
  • Hot dip galvanized coating provides corrosion resistance for exterior use
  • Flat head design yields a semi-flush finish for decks and outdoor structures
  • Meets or exceeds ASME B18.5, ASTM A307, and ASME B18.2.2 specifications

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