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Cup Hd Bolt 3\8UNC x 1.1\4 304 x 1
Cup Head Bolt â " UNC × 1¼" – 304 Stainless Steel
This â " UNC × 1¼" Cup Head Bolt is made from high-quality 304 stainless steel, offering excellent strength, corrosion resistance, and a polished finish. The domed cup head with a square neck design prevents rotation during tightening, providing a secure, flush fit — ideal for timber construction, marine fittings, fencing, decking, and general engineering applications.
The Unified National Coarse (UNC) thread ensures strong engagement and reliable fastening, while the 304-grade stainless steel composition provides long-term resistance to rust, pitting, and staining. This makes it suitable for indoor, outdoor, and coastal environments where durability and a professional appearance are essential.
Key Features
Size: â " UNC × 1¼" (9.5mm diameter × 32mm length)
Thread type: Unified National Coarse (UNC)
Material: 304 stainless steel
Domed cup head with square neck for anti-rotation
Excellent corrosion and weather resistance
Smooth, polished finish for a clean, professional look
Ideal for timber joints, marine fittings, fencing, and light construction
A reliable 304 stainless steel cup head bolt designed for strength, corrosion resistance, and a refined finish — perfect for marine, architectural, and general-purpose fastening.
Details
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Diameter:3\8UNC
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Length:1.1\4
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Thread Pitch:16 TPI