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Cup Hd Bolt 3\8UNC x 3.1\2 304 x 1

Stock Code:
3160810
Price:
$11.28

Cup Head Bolt ⅜" UNC × 3½" – 304 Stainless Steel

This ⅜" UNC × 3½" Cup Head Bolt is expertly crafted from high-quality 304 stainless steel, delivering excellent strength, corrosion resistance, and a polished professional finish. The domed cup head with a square neck prevents rotation during tightening, ensuring a secure, flush installation — ideal for timber construction, marine fittings, fencing, decking, and general fabrication work.

The Unified National Coarse (UNC) thread provides easy installation and dependable fastening, while the 304-grade stainless steel offers long-term protection against rust, pitting, and staining. Perfect for use in indoor, outdoor, and marine environments, this bolt combines strength and reliability with a refined appearance.

Key Features

  • Size: ⅜" UNC × 3½" (9.5mm diameter × 90mm 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 neat, professional look

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

A robust 304 stainless steel cup head bolt offering superior corrosion resistance, strength, and a clean polished finish — perfect for marine, outdoor, and structural applications.

Details

  • Diameter:
    3\8UNC
  • Length:
    3.1\2
  • Thread Pitch:
    16 TPI
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