Typhoon Performance Products Ltd

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Typhoon Bolt Protection Cap
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In Stock — Ready to dispatch

Typhoon Bolt Protection Cap

High-visibility Typhoon bolt protection caps designed to protect exposed bolt heads from corrosion, weather damage, and impact. Durable push-fit plastic caps suitable for structural steel, construction, and infrastructure applications.

Fast UK Dispatch
Up to 4hr Fire Rated
Bulk Discounts
Fast UK Dispatch
Bulk Discounts
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Price range: £7.96 through £88.94

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Need 1,000+ units? Request a Trade Quote
Once you approve your quote, we email your invoice to complete your order.
Estimated Delivery
1-2 Working Days
Order before 4pm (UK) for same-day dispatch after invoice has been paid.
Complete Range of Bolt Cap Sizes & Variations

Typhoon Bolt Caps are available in a comprehensive range of metric sizes from M12 to M64, including specialised options such as nut side, bolt head side, and extra grip variants. This ensures a precise fit across a wide range of applications and installation types.

Each cap is engineered to protect exposed bolts and threads from damage, corrosion, and environmental exposure. Ideal for demanding environments, Typhoon Bolt Caps help maintain structural integrity and reduce long-term maintenance costs.

Our online store is designed for smaller quantity orders, with simple checkout and fast processing.
For orders over 1,000 units, we provide a tailored service via direct enquiry, ensuring the most cost-effective solution for large-scale projects.

We offer delivery across the UK and internationally (EXW UK), using trusted couriers such as DHL Express and freight services. Shipping is calculated based on order requirements, urgency, and delivery method to ensure reliable fulfilment.

Manufactured to a high standard, Typhoon Bolt Caps are built for durability and consistent performance. With options including standard caps, extra grip versions, and specialised fittings, they are suitable for a wide range of industrial and construction applications.

Fitting Types & Sizes
Nut Side
UCNH
Bolt Head
UCBH
Available Metric Sizes — Click for dimensions
M12 M16 M20 M24 M27 M30 M36 M42 M45 M48 M52 M64
M12 Bolt Cap
H Ø
Bolt Size M12
Cap Diameter (Ø) 22mm
Cap Height (H) 18mm
Fits Bolt Thread M12 × 1.75
M20 Extra Grip version also available
Up to 4 hours fire protection, including jet fire
Earthquake-resistant protection for critical bolted connections
Lasting corrosion protection, proven to 1,000 hours of salt-spray testing
Protection in seconds, fitted in any weather to keep your build on schedule
Safer for your team, with no on-site VOCs and less time working at height

How It Works

Get your fire-rated bolt caps in three simple steps

1

Select Your Size

Choose from our range of metric sizes (M12 – M64) and select nut side or bolt head fitting

2

Choose Quantity

Choose your options and fill in the form for bulk pricing and freight options tailored to you.

3

Fast Delivery

UK stock ships fast. International orders via DHL Express or sea freight depending on urgency

Fire Rated Protection
Corrosion Resistant
UK Stock - Fast Dispatch
International Shipping
Fire Rated Protection
Corrosion Resistant
UK Stock - Fast Dispatch
International Shipping

Typhoon bolt protection caps shield exposed bolt heads and nuts from fire, corrosion, weather and impact damage. Engineered from durable, high-visibility impact-resistant plastic, each cap forms a tough protective cover over one of the most crucial parts of any structure: the bolted connection, helping extend the service life of structural fixings and reduce long-term maintenance.

Tested and demonstrated to provide up to 2 hours jet fire, 3 hours cellulosic and 4 hours hydrocarbon fire protection, with corrosion resistance proven through 1,000 hours of salt-spray testing, Typhoon caps deliver protection well beyond a standard cover. They install by push-fit in seconds, in any weather, with no on-site VOCs, keeping your build moving and your site cleaner and safer.

Available in metric, imperial and custom sizes and shapes, Typhoon bolt caps suit a wide range of bolt types and applications, protecting critical fastening points while improving site safety and visibility. Each cap fits securely over exposed bolts, helping prevent water ingress, corrosion, and accidental contact with sharp edges.

Key Features

  • Up to 4 hours fire protection, including jet fire and hydrocarbon ratings
  • Earthquake-resistant protection for critical bolted connections
  • Corrosion resistance proven to 1,000 hours of salt-spray testing
  • Push-fit installation in seconds, in any weather
  • No on-site VOCs for a cleaner, safer site
  • High-visibility safety yellow finish for improved hazard visibility
  • Durable, impact-resistant plastic construction
  • Available in metric, imperial and custom sizes and shapes

Typical Applications

  • Structural steel connections
  • Bridge and highway infrastructure
  • Rail installations
  • Oil, gas and petrochemical facilities
  • Offshore and energy infrastructure
  • Industrial frameworks
  • Construction projects
Weight N/A
Size

M12, M16, M20, M24, M27, M30, M36, M42, M45, M48, M52, M64
Cap Type

Bolt, Nut, Bolt Head, Extra Grip

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Why Choose Typhoon Products?

See how our certified bolt caps compare to generic alternatives

Feature Typhoon Products Generic Alternatives
Up to 4hr fire protection, incl. jet fire
Earthquake-resistant protection
1,000hr salt-spray corrosion tested
No on-site VOCs
Metric, imperial & custom sizes
UK stock, fast dispatch

Not Sure Which Size You Need?

Our bolt caps come in metric sizes from M12 through to M64, with options for both nut side (UCNH) and bolt head side (UCBH) fittings. If you’re unsure which size or fitting type you need, our technical team can help you find the right product for your application.

Contact Our Technical Team
We Can Help With
Sizing & Fit
Find the right cap for your bolts
Caps are available from M12 to M64, with nut side, bolt head and custom options. Tell us your bolt sizes and we will help you find the right fit. Get sizing help
Bulk & Trade Orders
Large quantities, tailored pricing
Ordering in volume? We offer competitive pricing for bulk and trade orders. Send us your sizes and quantities and we will prepare a tailored quote. Request a quote
Technical Advice
Fire, corrosion & application guidance
Not sure which protection you need? Our team can advise on fire ratings, corrosion protection and the right cap for your application and environment. Speak to our team