Cup Square Carriage Bolts with Hex Nut — Zinc Plated, M4 to M12 Packing Quantity (Kit):10 ✅ Metric variant fits M6

✅ Metric variant fits M6

kits are available in quantities of 2

300# (ultra-fine/black) — 10 pieces per grit so you always have the right abrasive at hand

Perfect for garages

5mm diameters with roll lengths from 18m to 100m

Cup Square Carriage Bolts with Hex Nut — Zinc Plated, M4 to M12 Packing Quantity (Kit):10 ✅ Metric variant fits M6Cup Square Carriage Bolts with Hex Nut Zinc Plated, M4 to M12 for Timber & General Fastening Whether you're building a deck, assembling garden furniture, or framing a shed, loose or spinning fasteners slow every job down. These cup square carriage bolts are designed for woodworkers, contractors, and serious DIYers who need a bolt that seats cleanly, stays put while you tighten the nut, and won't rust out after the first rainy season. Each kit includes