Grade 4.8 Cup Square Hex Bolts and Nuts DIN 603/555 BZP

Grade 4.8 cup square hex bolts and nuts, manufactured to DIN 603/555 standards and finished in bright zinc plate (BZP). Designed for heavy-duty fastening where secure connections between metal components or timber are required. The square head provides excellent grip for spanner or wrench application, whilst the cup provides load distribution and a neat finish.

Key Features

• Grade 4.8 — suitable for general engineering and structural applications
• DIN 603/555 specification — cup square hex bolt and nut pairing
• Bright zinc plated finish — corrosion resistance for outdoor and damp environments
• Square head design — excellent tool grip and turning torque
• Load-distributing cup head — reduces marking and improves bearing surface

Typical Applications

Construction frameworks, timber connections, structural steelwork assemblies, agricultural structures, machinery fixings, industrial assembly work, and general engineering projects where reliable fastening and corrosion resistance are required.

Material and Finish

Steel, bright zinc plated. The BZP finish offers protection in outdoor, agricultural, and damp industrial environments without the cost of stainless steel.