Bralo 371114006 Grooved Large Head Dome Insert Nut M4 12.25mm - Pa...

Zinc - A chemical element, a silver metal. Corrosion resistant. Combined with Copper makes Brass

Steel - An alloy made predominately of Iron combined with <2% carbon

Large - something that takes up more space than normal.

Dome - A curved shape usually seen on building structures.

Head - The upper part of a body typically separated by the neck.

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