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Cup Hd Bolt 5\16UNC x 2.1\2 304 x 1

Stock Code:
3160818
Price:
$2.43

Cup Head Bolt 5⁄16" UNC × 2½" – 304 Stainless Steel

This 5⁄16" UNC × 2½" Cup Head Bolt is made from premium 304 stainless steel, providing excellent strength, corrosion resistance, and a smooth polished finish. The domed cup head with a square neck prevents rotation during tightening and ensures a secure, flush fit — ideal for timber construction, marine fittings, fencing, decking, and general engineering applications.

The Unified National Coarse (UNC) thread provides easy installation and reliable engagement, while the 304-grade stainless steel guarantees long-lasting protection against rust, pitting, and staining. Perfect for indoor, outdoor, and coastal environments, this bolt combines durability, performance, and clean aesthetics.

Key Features

  • Size: 5⁄16" UNC × 2½" (7.9mm diameter × 64mm 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

  • Smooth polished finish for a professional appearance

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

A durable 304 stainless steel cup head bolt designed for strength, corrosion resistance, and a clean finish — perfect for marine, outdoor, and structural applications.

 

Details

  • Diameter:
    5\16UNC
  • Length:
    2.1\2
  • Thread Pitch:
    18 TPI
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