• M8 Hex Flange Bolt 16mm Zinc Plated
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FLANGE BOLTS 8 X 16

FLANGE BOLTS 8 X 16

Low stock: 2 left

$8.45 AUD
$0.00 AUD $8.45 AUD
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A flange bolt does the washer's job before you've even reached for one.

The wide serrated flange sits under the head and bites into the surface as you tighten it, spreading the load so the bolt stops working loose under vibration. That's the difference between a fastener that holds on a trailer or a mower deck and one you're re-tightening every fortnight.

This is the M8 x 16mm, Class 8.8 high tensile and zinc plated to shrug off a shed floor or a wheel arch. It drives with a standard spanner or socket, no special tooling needed, and it's the size for trailer chassis, machinery mounts and anything towing-related where you want more grip. It's a shorter length, right for bracket work and thinner stock where you don't want the thread poking out the back.

Thread pitch and the full spec sheet are in the tabs below if you need to match it exactly.

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The technical bits

  • Thread size: M8
  • Length: 16mm
  • Thread pitch: 1.25mm (coarse)
  • Head type: Hex flange, serrated
  • Standard: DIN 6921
  • Grade: Class 8.8 high tensile
  • Finish: Zinc plated
  • Drive: External hex (spanner or socket)
  • Material: Carbon steel

Why these earn their place in the kit

  • Built-in flange spreads the load so you can skip the separate washer
  • Serrated face bites in as you tighten and resists shaking loose
  • Class 8.8 steel holds torque on metal without stretching
  • Zinc plating keeps rust off in the shed or under a vehicle
  • Hex head drives with a standard spanner or socket
  • Sized to a common metric thread for repairs and bolt-ups

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.

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