• Macsim Hex Bolt and Nut 3/8" x 5 1/2" Zinc Plated
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Macsim 3/8 x 5 1/2 HEX BOLT & NUT Zinc Plated

Macsim 3/8 x 5 1/2 HEX BOLT & NUT Zinc Plated

14 in stock

$3.20 AUD
$0.00 AUD $3.20 AUD
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When you're bolting a frame together or hanging a bracket, a bolt that turns up with its own nut saves you hunting through the drawer for a partner. This 3/8 inch one comes matched and ready.

It's a Grade 4.6 zinc-plated bolt, made for everyday framing and bracket work where you want a solid, dependable fix rather than high-tensile strength. The hex head takes a standard spanner or socket, so it pulls up clean and tight.

Worth knowing before you buy. The zinc plating handles moisture indoors and under cover, but for anything coastal or out in the weather long-term, go galvanised instead. It's imperial sizing too, so it matches older fittings and existing holes.

Full sizes and specs are in the tabs below. If you're not sure which length you need, pop in or give us a call and we'll sort it out.

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Bolt specs

  • Type: Hex bolt with matching nut
  • Diameter: 3/8"
  • Length: 5 1/2"
  • Thread: Imperial UNC coarse
  • Grade: 4.6 general-purpose mild steel
  • Finish: Zinc plated
  • Head: Hex
  • Best suited to: Indoor or sheltered use

Why reach for this one

  • Turns up with its own nut, so there's no second trip to the fastener wall
  • Hex head drives with a standard spanner or socket you already own
  • Zinc coating keeps surface rust off in dry, covered spots
  • Grade 4.6 steel is plenty for general framing and bracket jobs
  • Imperial sizing drops straight into older fittings and pre-drilled holes
  • One bolt does timber-to-timber or metal-to-metal

Shipping and Returns

We pack and send your order with care, right here from our Strathalbyn store. Most parcels leave within 1-2 business days, and you'll get tracking as soon as it's on the way. If you're local, you can choose click-and-collect or our delivery service at checkout.

If something arrives damaged or not quite right, let us know within 14 days and we'll sort it quickly. You can return unused items in their original condition for a refund or store credit. For safety reasons, we can't accept returns on gas bottles, cut materials, or custom orders.

We're here to make things easy, so if you ever have a question about your delivery or a return, our team is only a call away.

Why you'll love shopping with us

  • Trade-grade, job-tested

    This gear is selected for daily use on real job sites, not light-duty or one-off projects.

  • Right gear, first time

    We help you get the correct product and spec upfront so you’re not redoing work later.

  • In and out fast

    Call ahead and we'll set your order aside so you spend less time at the counter.