[400 BULK] Grade 8 Zinc Yellow Plated Carriage Bolts 5/16-18 X 4

Mutual ScrewSKU: 3164C8KC

Price:
Sale price$452.37per 400( $1.13 each)
Pieces 400
Measurement type Inch
Thread size 5/16-18
Diameter 5/16
Length 4
Material Steel
Finish Zinc Yellow Plated
Grade 8
Head style Carriage
Threads per inch 18
Weight 32.0 lb

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

Description

Grade 8 Zinc Yellow Plated Carriage Bolts deliver exceptional strength for demanding wood-to-wood and metal-to-wood assemblies. Sized at 5/16-18 x 4, these bolts combine a high-strength Grade 8 steel core with a durable zinc yellow finish to resist corrosion in indoor and outdoor environments.

Designed with a domed head and square neck, they grip the workpiece to prevent turning during tightening, ensuring fast, reliable assemblies every time.

Product Details

  • Material: Grade 8 steel for high strength and durability.
  • Finish: Zinc yellow plated for corrosion resistance and long service life.
  • Size: 5/16-18 UNC thread, 4 inch length.
  • Head: Domed carriage bolt head with square neck to prevent turning in wood.
  • Applications: Wood-to-wood assemblies, furniture, cabinetry, decking, and other heavy-duty projects.
  • Compatibility: Use with corresponding nuts and washers as needed.

Installation tip: Align the pieces, insert the carriage bolt, and tighten with a nut on the opposite side. The square neck bites into the wood to resist turning, keeping your project square and secure.

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800-222-0324

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