[5-1-A] Zinc Plated Hex Bolt

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About this category

Zinc-plated carbon steel hex bolts - the most common and most economical structural fastener, driven with an ordinary spanner or socket. The zinc plating gives basic rust protection for indoor frames, machine bases and similar; for permanent outdoor or wet locations use the stainless hex bolts in the same section.

Standards DIN 933 · DIN 931

How to choose

• Check fully threaded (933) versus partly threaded (931) - the plain shank carries shear, full thread does not.
• Zinc plating scratches easily; avoid cheater bars, since damaged plating is where rust starts.
• Strength grade depends on the material - confirm the grade before substituting in structural joints.