M12 x 300mm Hot Dip Galvanised Cup Head Bolts & Nuts

Rely on serious strength for heavy timber projects with these M12 x 300mm Cup Head Bolts and Nuts. The extra-long 300mm length and 12mm shaft deliver deep, high-load fastening for oversized posts, beams, and structural timber, helping your build stay solid from end to end.

The hot dip galvanised coating provides robust rust protection for outdoor longevity, even in wet, coastal, or exposed environments. The rounded cup head offers a clean, tamper-resistant finish that looks professional on any timber joinery.

Shipping options available. In‑store pickup available — contact us for pickup location & hours.