M5 (Nut Depth 15mm) Hex Coupling Nut - 316 Stainless Steel

The Metric Hex Coupling Nut - 316 Stainless Steel is a 316 stainless steel hex coupling nut for joining threaded rod sections in marine and structural assemblies. Supplied in A4 / 316 Stainless Steel, it is suited to professional installation and long-service applications in marine, coastal, and industrial environments.

Where this product is used

• Marine and coastal construction requiring superior corrosion resistance.
• Architectural metalwork and outdoor structures in harsh environments.
• Industrial applications where standard zinc-plated fasteners would corrode.

Key specifications

Selecting the right option

For marine, coastal, and outdoor applications, always specify 316 (A4) grade for maximum corrosion resistance. 304 (A2) is suitable for indoor and sheltered outdoor use. Pair stainless fasteners with stainless washers and nuts to avoid galvanic corrosion between dissimilar metals.