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Cup Hd Bolt 5\16UNC x 3 304 x 1

Stock Code:
3160819
Price:
$2.89

Cup Head Bolt 5⁄16" UNC × 3" – 304 Stainless Steel

This 5⁄16" UNC × 3" Cup Head Bolt is crafted from high-quality 304 stainless steel, providing excellent strength, corrosion resistance, and a smooth polished finish. The domed cup head with a square neck design prevents rotation during tightening and ensures a secure, flush fit — ideal for timber construction, marine fittings, decking, fencing, and general fabrication applications.

The Unified National Coarse (UNC) thread ensures strong fastening performance and easy installation, while the 304-grade stainless steel construction delivers long-lasting protection against rust, pitting, and staining. Perfect for indoor, outdoor, and coastal environments, this bolt offers both strength and a professional appearance.

Key Features

  • Size: 5⁄16" UNC × 3" (7.9mm diameter × 75mm length)

  • Thread type: Unified National Coarse (UNC)

  • Material: 304 stainless steel

  • Domed cup head with square neck for anti-rotation grip

  • Excellent corrosion and weather resistance

  • Smooth polished finish for a clean, professional look

  • Ideal for timber joints, marine fittings, decking, and construction

A dependable 304 stainless steel cup head bolt combining strength, corrosion resistance, and a refined finish — perfect for marine, outdoor, and structural applications.

Details

  • Diameter:
    5\16UNC
  • Length:
    3
  • Thread Pitch:
    18 TPI
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