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Trusted by Builders and Subbies. +50,000 products shipped to sites Australia wide.
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Guard Rail Post Bolt – Mushroom Head 50mm x 16mm Galvanised

Guard Rail Post Bolt – Mushroom Head 50mm x 16mm Galvanised

Delivery in 3 - 5 days. MAX 5 day delivery guarantee! Metro BNE, SYD, MEL.

ASNZ 2890.1:2004 compliant for car parks.

60 day returns. No re-stocking fees.

100% money back guarantee. Not satisfied? Full refund, no questions asked.

$150 inc GST minimum order

Buy now!

$1.82 inc GST

Notify me when back in stock

Guard Rail Post Bolt – Mushroom Head – Galvanised

Engineered for durability and safety, the Mushroom Head Post Bolt is an essential component of the Car Parks and Roads Guardrail system. Designed to fix guardrail beams to posts, this 50mm x 16mm bolt features a mushroom head for a smooth finish and reduced snag risk, ideal for high-traffic environments and industrial applications.

Made from galvanised steel, the bolt provides excellent resistance to corrosion and weathering, ensuring long-term performance whether used in roadside, warehouse, or factory installations.


Key Features:


  • Mushroom Head Design: Reduces catching hazards and creates a flush finish
  • Corrosion Resistant: Galvanised to meet AS 4680:2006 standards
  • Heavy Duty: Ideal for securely fixing W-beam guardrails to C-posts
  • Compatible: Works with standard Car Parks and Roads guardrail systems


Applications:


  • Fixing W-beam guardrails to in-ground or surface-mounted C-posts
  • Use in road safety barriers, warehouse pedestrian protection zones, and car parks


Frequently Asked Questions (FAQ)


What size hole is required for installation?
A 16mm mounting hole is suitable for this 50mm x 16mm mushroom head bolt.


Is the nut included with the bolt?
Yes, the nut is included with the bolt for convenience and complete installation.


Can this bolt be used with powder-coated guardrail systems?
Yes, it is fully compatible with both galvanised and powder-coated W-beam guardrails.


Contact us and we’ll help you select the right fittings for your project.

Who we've worked with

Description

Guard Rail Post Bolt – Mushroom Head – Galvanised

Engineered for durability and safety, the Mushroom Head Post Bolt is an essential component of the Car Parks and Roads Guardrail system. Designed to fix guardrail beams to posts, this 50mm x 16mm bolt features a mushroom head for a smooth finish and reduced snag risk, ideal for high-traffic environments and industrial applications.

Made from galvanised steel, the bolt provides excellent resistance to corrosion and weathering, ensuring long-term performance whether used in roadside, warehouse, or factory installations.


Key Features:


  • Mushroom Head Design: Reduces catching hazards and creates a flush finish
  • Corrosion Resistant: Galvanised to meet AS 4680:2006 standards
  • Heavy Duty: Ideal for securely fixing W-beam guardrails to C-posts
  • Compatible: Works with standard Car Parks and Roads guardrail systems


Applications:


  • Fixing W-beam guardrails to in-ground or surface-mounted C-posts
  • Use in road safety barriers, warehouse pedestrian protection zones, and car parks


Frequently Asked Questions (FAQ)


What size hole is required for installation?
A 16mm mounting hole is suitable for this 50mm x 16mm mushroom head bolt.


Is the nut included with the bolt?
Yes, the nut is included with the bolt for convenience and complete installation.


Can this bolt be used with powder-coated guardrail systems?
Yes, it is fully compatible with both galvanised and powder-coated W-beam guardrails.


Contact us and we’ll help you select the right fittings for your project.

Shipping

Shipping Information

Domestic Shipping (Australia)

Due to the size and weight of most orders, shipping is automatically calculated at checkout. Below is a guide to our freight charges:

  • Order value $1 – $299: $69 shipping
  • Order value $300 – $599: $99 shipping
  • Order value $600 – $849: $139 shipping
  • Order value $850 – $1,099: $169 shipping
  • Order value $1,100 – $1,500: $199 shipping
  • Order value $1,501 – $2,499: $239 shipping
  • Order value $2,500 and above: $299 shipping

Please note: We operate a freight-only model. We do not offer customer pick-up from our warehouses. All orders are dispatched via courier or freight carrier to your site or depot. This ensures faster delivery times, tighter quality control, and minimal disruption to warehouse operations.

Order Confirmation

Once your order is placed, you’ll receive an order confirmation email. This confirms that your order has been received and your payment has been pre-authorised.

We will then verify stock availability. If an item is unavailable or on back-order, we’ll void the pre-authorisation and contact you to discuss alternative options.

If your item is in stock and available for immediate shipment (within 5 business days), we will finalise payment and prepare your order for dispatch.

Order Dispatch & Shipping Notifications

If your order is in stock, it will be shipped within 3 business days of order confirmation.

All orders are shipped via freight only — no pick-up is available. You’ll receive a shipping confirmation email with tracking details within 24 hours of dispatch.

If you haven’t received a shipping notification within 4 business days, please contact us at orders@carparksandroads.com.au.

International Orders

We do ship internationally, but please note:

  • Our products are built for the Australian market (240V electrical systems).
  • They may not meet overseas electrical safety certifications.

We can provide a shipping quote for international orders upon request. If you’re happy with the quote, we’ll send a secure payment link and process your order manually.

Damaged Deliveries

Please inspect your items immediately upon delivery.

  • If you notice damage on arrival, note it on the delivery docket or reject the shipment.
  • If you do accept a damaged delivery, take photos of the packaging and product immediately.

To lodge a damage claim, send photos to orders@carparksandroads.com.au and visit our Returns page to submit a claim online.

Why Buy From Us

With 18 years serving the construction industry, we know exactly what you're going through at the end of a job.

 

Here's why you should shop with us at Car Parks and Roads.

 

  • Product knowledge. We know what you need to finish the job and get certified.

 

  • On time deliveries. You'll get priority shipping Australia wide from our closest dispatch warehouse. Next day shipping for orders before 3pm.

 

  • 60 day easy returns. Not happy with your product, we'll take it back no questions asked.

 

  • Your satisfaction guaranteed. We handpick our products for compliance and quality. If there is ever something wrong, we'll fix it straight away.

We get it . . .

We've got 18 years experience

in the Construction Industry.

Buy online - fast and easy.

Or send us your plans for a project quote.

orders@carparksandroads.com.au

30 day accounts upon application.