Bolts, Nuts and Washers
Bolts, Nuts and Washers
Bolts, Nuts and Washers for Structural Connections
Bolts, nuts, and washers are the reliable choice for structural connections that need to be strong, adjustable, or removable. We stock galvanised bolts in M6 through to M20, matched with the right nuts and washers for each size and application, covering everything from decking posts and pergola frames through to fencing, structural steel, and formwork connections. Delivery across Sydney, the Blue Mountains, Wollongong, and the Central Coast.
Choosing the Right Bolt for the Job
For most structural outdoor applications, galvanised hex head bolts are the standard choice. The galvanised coating provides corrosion resistance suited to treated timber connections and exposed outdoor environments. Pair with galvanised hex nuts and flat washers to protect the timber surface and prevent pull-through.
Bolt diameter and length determine the load capacity of the connection. M8 and M10 bolts cover most domestic decking and pergola applications. M12 through to M20 are for heavier structural work including retaining walls, steel-to-timber connections, and commercial builds.
Where you need a bolt-style fixing that goes into masonry rather than through a timber connection, our sleeve anchors handle structural loads into concrete and block from M6 to M20. For continuous threaded connections, threaded rod (also called allthread) is available in standard metric lengths. Both are part of our full fasteners range.
Why Buy From Blacktown Building Supplies?
Why shop with Blacktown Building Supplies:
- Fast delivery across Sydney and beyond: We deliver to Sydney, the Blue Mountains, Wollongong, and the Central Coast. Order online and we will take care of the rest.
- Click and collect from Arndell Park: Order online and pick up from our Western Sydney warehouse at a time that suits you.
- Trade pricing and bulk packs available: Competitive pricing for tradies and contractors, with bulk packs across most product lines. Ask us about a trade account.
- Huge range, one supplier: Fasteners, timber, sheet products, cladding, doors, and cement, all under one roof. Sort the whole job without switching suppliers.
- Australian-owned family business: Based in Western Sydney, we have been serving tradies and homeowners for years. Real people, real stock, real advice.
- Order online 24/7: Browse the full range, check stock, and place your order any time. Pickup or delivery, we will have it sorted.
Yes We Can.
Need help specifying bolt sizes for a structural connection? Call us on 1300 554 775 or get a fast online quote and we will sort it out.