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Cup Hd Bolt 5\16UNC x 4 304 x 1

Stock Code:
3160820
Price:
$4.02

Cup Head Bolt 5⁄16" UNC × 4" – 304 Stainless Steel

This 5⁄16" UNC × 4" Cup Head Bolt is precision-engineered from premium 304 stainless steel, providing exceptional corrosion resistance, strength, and a clean polished finish. The domed cup head with a square neck design prevents rotation during tightening and ensures a secure, flush installation — perfect for timber construction, decking, fencing, marine fittings, and general engineering work.

The Unified National Coarse (UNC) thread ensures strong engagement and smooth assembly, while the 304-grade stainless steel offers lasting resistance to rust, pitting, and staining. Suitable for indoor, outdoor, and coastal environments, this bolt provides durability and a professional finish for structural and decorative projects.

Key Features

  • Size: 5⁄16" UNC × 4" (7.9mm diameter × 100mm length)

  • Thread type: Unified National Coarse (UNC)

  • Material: 304 stainless steel

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

  • Excellent corrosion and weather resistance

  • Polished finish for a professional appearance

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

A high-quality 304 stainless steel cup head bolt designed for strength, corrosion resistance, and a clean finish — perfect for marine, outdoor, and general construction applications.

Details

  • Diameter:
    5\16UNC
  • Length:
    4
  • Thread Pitch:
    18 TPI
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