45mm x 5.5mm Coloured Hex Head Tek Bolt - BZP Steel

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45mm x 5.5mm Coloured Hex Head Tek Bolt

The 45mm x 5.5mm is the longest standard Tek bolt in the light section range — 34mm of effective thread engagement, Self-Drilling No.3 point, rated for steel up to 5.0mm. When the 38mm doesn't reach far enough, this is the correct choice. Drive it with an 8mm hex socket, no pilot hole.

It is specified for structural connections where maximum thread depth matters: thick assemblies with standoff layers or packers, heavy-duty bracket fixing, and multi-layer steel subframes where pull-out resistance is a design consideration. The full 34mm of thread in the substrate means this bolt stays put under load, vibration, and thermal movement in a way that shorter options cannot guarantee.

Powder coated to your RAL specification. At 45mm, the bolt is a prominent visual element on any finished installation — the head colour needs to be right, and on a structural connection it also needs to hold. This does both.

Colour Matched to Your RAL Specification

40 stocked RAL colours for standard 3–5 working day lead times. Browse the full stocked range. Any RAL Classic colour to order — if your project has a specific colour requirement that falls outside our stocked range, contact us. We can match it. That's not a special service here — it's what we do.

Typical Applications

The 45mm x 5.5mm is the maximum-engagement option for demanding structural connections:

  • Thick multi-layer steel assemblies and sandwich panel subframes
  • Structural bracket fixing with significant standoff or packer layers
  • Heavy-duty sign frame and sign rail connections
  • Steel RHS and SHS connections requiring deep thread engagement
  • Secondary steelwork where pull-out resistance is a design requirement
  • High-load architectural metalwork and structural cladding systems

Specification

Size (mm) 5.5 x 45
Head Type Hex Washer Head
Socket Size 8.0mm
Fixed Washer Ø 12.0mm
Point Type Self-Drilling No.3
Thread Type 60° Self-Tapping, Fully Threaded
Effective Thread Length 34mm
Max Drill Thickness 5.0mm
Material Case & Core Hardened Carbon Steel
Finish Bright Zinc Plated (BZP) — head powder coated to specified RAL colour
Substrates Steel up to 5.0mm
Fire Classification A1
Standard BS EN 14566:2008 | BS EN 10666 (DIN 7504)

Frequently Asked Questions

When would I specify the 45mm over the 38mm?

When you need maximum thread depth — thick multi-layer assemblies, structural connections with a standoff or packer, or heavy bracket fixing where the 38mm's 27mm thread engagement is insufficient. The 45mm gives 34mm of thread in the substrate.

Is it still rated for the same steel thickness?

Yes. The 45mm shares the same Self-Drilling No.3 point rated for steel up to 5.0mm. The longer length increases thread engagement, not drill capacity.

Can I order a bespoke RAL colour?

Yes. 40 stocked RAL colours for standard lead times. Any RAL Classic colour to order. Contact us with your reference and project quantity.

What drive tool should I use?

An 8mm hex socket on a standard corded or cordless drill at 1,000–1,800 RPM. Keep the driver perpendicular to the substrate. Avoid impact drivers at this length — tip damage before full penetration is a real risk.

Powder Coated Tek Bolts

The 45mm Tek bolt is a prominent fastener — both visually and structurally. RALfixings powder coats every head to your RAL specification using an in-house electrostatic process: colour bonded to the metal, heat cured, and matched to the standard your project references. The finish is durable enough to survive installation, site conditions, and long-term service without fading or chipping.

The coating is applied to the head. The BZP shank and Self-Drilling No.3 point are unaffected — the bolt performs exactly to specification from the first drive to the last.

Benefits of powder coated Tek bolts:

  • Scratch resistant
  • Rust resistant
  • UV resistant
  • Weather resistant
  • Colourfast

Other Coloured Hex Head Tek Bolt Sizes

45mm x 5.5mm Coloured Hex Head Tek Bolt

The 45mm x 5.5mm is the longest standard Tek bolt in the light section range — 34mm of effective thread engagement, Self-Drilling No.3 point, rated for steel up to 5.0mm. When the 38mm doesn't reach far enough, this is the correct choice. Drive it with an 8mm hex socket, no pilot hole.

It is specified for structural connections where maximum thread depth matters: thick assemblies with standoff layers or packers, heavy-duty bracket fixing, and multi-layer steel subframes where pull-out resistance is a design consideration. The full 34mm of thread in the substrate means this bolt stays put under load, vibration, and thermal movement in a way that shorter options cannot guarantee.

Powder coated to your RAL specification. At 45mm, the bolt is a prominent visual element on any finished installation — the head colour needs to be right, and on a structural connection it also needs to hold. This does both.

Colour Matched to Your RAL Specification

40 stocked RAL colours for standard 3–5 working day lead times. Browse the full stocked range. Any RAL Classic colour to order — if your project has a specific colour requirement that falls outside our stocked range, contact us. We can match it. That's not a special service here — it's what we do.

Typical Applications

The 45mm x 5.5mm is the maximum-engagement option for demanding structural connections:

  • Thick multi-layer steel assemblies and sandwich panel subframes
  • Structural bracket fixing with significant standoff or packer layers
  • Heavy-duty sign frame and sign rail connections
  • Steel RHS and SHS connections requiring deep thread engagement
  • Secondary steelwork where pull-out resistance is a design requirement
  • High-load architectural metalwork and structural cladding systems

Specification

Size (mm) 5.5 x 45
Head Type Hex Washer Head
Socket Size 8.0mm
Fixed Washer Ø 12.0mm
Point Type Self-Drilling No.3
Thread Type 60° Self-Tapping, Fully Threaded
Effective Thread Length 34mm
Max Drill Thickness 5.0mm
Material Case & Core Hardened Carbon Steel
Finish Bright Zinc Plated (BZP) — head powder coated to specified RAL colour
Substrates Steel up to 5.0mm
Fire Classification A1
Standard BS EN 14566:2008 | BS EN 10666 (DIN 7504)

Frequently Asked Questions

When would I specify the 45mm over the 38mm?

When you need maximum thread depth — thick multi-layer assemblies, structural connections with a standoff or packer, or heavy bracket fixing where the 38mm's 27mm thread engagement is insufficient. The 45mm gives 34mm of thread in the substrate.

Is it still rated for the same steel thickness?

Yes. The 45mm shares the same Self-Drilling No.3 point rated for steel up to 5.0mm. The longer length increases thread engagement, not drill capacity.

Can I order a bespoke RAL colour?

Yes. 40 stocked RAL colours for standard lead times. Any RAL Classic colour to order. Contact us with your reference and project quantity.

What drive tool should I use?

An 8mm hex socket on a standard corded or cordless drill at 1,000–1,800 RPM. Keep the driver perpendicular to the substrate. Avoid impact drivers at this length — tip damage before full penetration is a real risk.

Powder Coated Tek Bolts

The 45mm Tek bolt is a prominent fastener — both visually and structurally. RALfixings powder coats every head to your RAL specification using an in-house electrostatic process: colour bonded to the metal, heat cured, and matched to the standard your project references. The finish is durable enough to survive installation, site conditions, and long-term service without fading or chipping.

The coating is applied to the head. The BZP shank and Self-Drilling No.3 point are unaffected — the bolt performs exactly to specification from the first drive to the last.

Benefits of powder coated Tek bolts:

  • Scratch resistant
  • Rust resistant
  • UV resistant
  • Weather resistant
  • Colourfast

Other Coloured Hex Head Tek Bolt Sizes

Delivery & Shipping Terms

1. Where We Deliver

We currently ship to addresses within the United Kingdom only.

If you require delivery outside the UK, this must be arranged in advance. Where international delivery is agreed:

  • You are fully responsible for all import duties, taxes, and customs charges, including any fees for customs paperwork.
  • RALfixings accepts no liability for customs delays or additional costs associated with international shipments.

2. Delivery Timescales

Our products fall into two categories: in-stock and made-to-order (bespoke) items.

In-Stock Items

  • Usually dispatched within 1–2 working days.
  • Delivery typically takes 1–3 working days from the dispatch date.

Powder Coated / Made-to-Order Items

  • Typically dispatched within 3–5 working days, but may take up to 10 working days during busy periods.
  • Delivery typically takes 1–3 working days after dispatch.

All quoted times are estimates, not guarantees. Delivery times may be affected by stock availability, courier performance, weather, or other factors beyond our control.

3. Shipping Costs

  • Shipping charges are based on order weight and destination.
  • The exact shipping cost will be shown at checkout before payment.
  • Additional shipping charges may apply to remote areas or multiple consignments.

4. Tracking and Responsibility

All orders are shipped via tracked courier services to ensure maximum security and visibility.

Once your order has been dispatched:

  • You will receive an order dispatch email letting you know your order is on it's way, and another email from Royal Mail or the chosen courier with your tracking information. If you have supplied a UK phone number you may also recieve a tracking text from Royal Mail or the chosen courier.
  • Responsibility for the goods passes to you upon dispatch.
  • RALfixings is not liable for loss or damage in transit. Please contact the courier directly with your tracking number if issues arise.

5. Missed Deliveries or Delays

If your parcel cannot be delivered and is returned to us:

  • We can resend it, but an additional delivery charge will apply.
  • We are not responsible for courier delays or failed delivery attempts.

If your order hasn’t arrived within the estimated delivery window, please contact us as soon as possible at info@ralfixings.com.

Order Amendments & Cancellations

Changing an Order

We begin preparing orders quickly — especially made-to-order items.

  • If you need to amend your order, please contact us within 24 hours or as soon as possible.
  • After this period, it may be too late to make changes as your order may already be in production or dispatched.
  • If you wish to add items, and your order hasn’t yet shipped, we may be able to combine them. Otherwise, a new order (and delivery charge) will apply.

Returns & Refunds

1. Your Right to Cancel – B2C Customers Only

Under the Consumer Contracts Regulations 2013, B2C customers have the right to cancel certain purchases made online within 14 days of delivery.

However, this does not apply to:

  • Bespoke or made-to-order goods — including all powder coated screws and fixings manufactured specifically for your order.

If your order includes stocked items only, you may cancel and return those goods within 14 days of receipt. You must:

  • Inform us in writing via email within 14 days.
  • Return the goods at your own cost, in their original condition and packaging.
  • Ensure the items are received by us within 30 days of delivery.

We recommend using a tracked and insured delivery service for any returns, as we are not responsible for items lost or damaged in return transit.

2. Faulty or Incorrect Items

If you receive goods that are:

  • Faulty, or
  • Incorrectly supplied (e.g. wrong size, colour, or product)

Please notify us within 30 days of receiving the goods.

We will:

  • Replace the items where possible, or
  • Issue a refund if replacement is not appropriate.

You may be asked to return the faulty items for inspection before a refund or exchange is processed.

Once screws have been installed or used, they cannot be returned or refunded, unless faulty.

3. Refund Processing

  • Refunds (where applicable) are processed within 5 working days of receiving the returned items.
  • Refunds are only issued to the original payment method.
  • Refunds cannot be made to a different card or by other means.
  • Delivery charges are non-refundable unless your entire order was cancelled before dispatch or the goods were faulty or incorrect.

Returns Address

To return items, please send them to:

FAO: Jon Lett
RALfixings Ltd
26a Queens Road
Knaphill
Surrey
GU212DX

B2B Orders & Restocking Fee

The rights described above apply primarily to consumers (B2C). If you are a business customer (B2B), statutory cancellation rights under the Consumer Contracts Regulations do not apply.

Returns from business customers are accepted at our sole discretion, and only if agreed in writing before the goods are returned.

All authorised B2B returns are subject to a 15% restocking fee, which will be deducted from the final refund amount. This fee covers the cost of inspection, repackaging, and administrative processing.

Returned goods must be:

  • In resaleable, unused condition
  • In their original packaging
  • Returned at the buyer’s expense via a tracked delivery service

We do not accept returns of any bespoke or made-to-order products under any circumstances unless the item is faulty.

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45mm x 5.5mm Coloured Hex Head Tek Bolt

The 45mm x 5.5mm is the longest standard Tek bolt in the light section range — 34mm of effective thread engagement, Self-Drilling No.3 point, rated for steel up to 5.0mm. When the 38mm doesn't reach far enough, this is the correct choice. Drive it with an 8mm hex socket, no pilot hole.

It is specified for structural connections where maximum thread depth matters: thick assemblies with standoff layers or packers, heavy-duty bracket fixing, and multi-layer steel subframes where pull-out resistance is a design consideration. The full 34mm of thread in the substrate means this bolt stays put under load, vibration, and thermal movement in a way that shorter options cannot guarantee.

Powder coated to your RAL specification. At 45mm, the bolt is a prominent visual element on any finished installation — the head colour needs to be right, and on a structural connection it also needs to hold. This does both.

Colour Matched to Your RAL Specification

40 stocked RAL colours for standard 3–5 working day lead times. Browse the full stocked range. Any RAL Classic colour to order — if your project has a specific colour requirement that falls outside our stocked range, contact us. We can match it. That's not a special service here — it's what we do.

Typical Applications

The 45mm x 5.5mm is the maximum-engagement option for demanding structural connections:

  • Thick multi-layer steel assemblies and sandwich panel subframes
  • Structural bracket fixing with significant standoff or packer layers
  • Heavy-duty sign frame and sign rail connections
  • Steel RHS and SHS connections requiring deep thread engagement
  • Secondary steelwork where pull-out resistance is a design requirement
  • High-load architectural metalwork and structural cladding systems

Specification

Size (mm) 5.5 x 45
Head Type Hex Washer Head
Socket Size 8.0mm
Fixed Washer Ø 12.0mm
Point Type Self-Drilling No.3
Thread Type 60° Self-Tapping, Fully Threaded
Effective Thread Length 34mm
Max Drill Thickness 5.0mm
Material Case & Core Hardened Carbon Steel
Finish Bright Zinc Plated (BZP) — head powder coated to specified RAL colour
Substrates Steel up to 5.0mm
Fire Classification A1
Standard BS EN 14566:2008 | BS EN 10666 (DIN 7504)

Frequently Asked Questions

When would I specify the 45mm over the 38mm?

When you need maximum thread depth — thick multi-layer assemblies, structural connections with a standoff or packer, or heavy bracket fixing where the 38mm's 27mm thread engagement is insufficient. The 45mm gives 34mm of thread in the substrate.

Is it still rated for the same steel thickness?

Yes. The 45mm shares the same Self-Drilling No.3 point rated for steel up to 5.0mm. The longer length increases thread engagement, not drill capacity.

Can I order a bespoke RAL colour?

Yes. 40 stocked RAL colours for standard lead times. Any RAL Classic colour to order. Contact us with your reference and project quantity.

What drive tool should I use?

An 8mm hex socket on a standard corded or cordless drill at 1,000–1,800 RPM. Keep the driver perpendicular to the substrate. Avoid impact drivers at this length — tip damage before full penetration is a real risk.

Powder Coated Tek Bolts

The 45mm Tek bolt is a prominent fastener — both visually and structurally. RALfixings powder coats every head to your RAL specification using an in-house electrostatic process: colour bonded to the metal, heat cured, and matched to the standard your project references. The finish is durable enough to survive installation, site conditions, and long-term service without fading or chipping.

The coating is applied to the head. The BZP shank and Self-Drilling No.3 point are unaffected — the bolt performs exactly to specification from the first drive to the last.

Benefits of powder coated Tek bolts:

  • Scratch resistant
  • Rust resistant
  • UV resistant
  • Weather resistant
  • Colourfast

Other Coloured Hex Head Tek Bolt Sizes

£6.99

In Stock

Adding to basket... The item has been added
Bulk Discount
No reviews have been written yet, be the first. Write a Review

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