91 products
Washers, Caps & Sheet Fixings
washers-caps-sheet-fixings
TIMCO Hex Head Cover Caps Flame Red - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Jade - 16mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Aztec - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Metallic Silver - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Pure White - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Dark Silver - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Anthracite - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps White Aluminium - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Slate Grey - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Sargasso - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Ultra Marine - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Cornflower - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Wedgewood Blue - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
TIMCO Hex Head Cover Caps Ocean Blue - 19mm (1000pcs)
- Pack quantity
- 1000 Pieces
- Price
- £16.80Incl. VAT
Washers, Caps & Sheet Fixings For Trade Professionals
Shop our full range of cover caps, sealing washers, and corrugated sheet fixings. Trusted by roofers, cladding installers, and contractors across the UK.
What This Collection Includes
This collection covers all the accessories you need to finish a metal roofing or cladding job properly. From plastic tek screw cover caps to sela washers for corrugated sheets, every product here serves a clear, practical purpose.
You will find products suited to exposed fixings on metal panels, corrugated sheet roofing, and structural cladding systems. Choosing the right accessory makes your fixing points weatherproof, secure, and neat.
Tek Screw Cover Caps
Plastic caps that snap over the head of a hex-head tek screw. They conceal the fixing point and help prevent water sitting on the screw head. Available in a wide range of RAL colours.
BAZ Washers
Large-diameter washers that spread load across a wider area. Used in roofing and cladding where standard screw bearing area is not sufficient. Available in stainless steel for corrosion resistance.
Corrugated Sheet Fixings
Purpose-made fixings for securing corrugated sheets to timber or structural supports. Available in black and clear plastic versions. Sold in packs of 50.
Sela Washers And Cover Caps
Sealing washers designed for use with corrugated sheet fixings. The washer creates a weatherproof seal around the fixing hole. The matching sela cap then covers the fixing for a clean result.
Bonded Washers
A metal washer bonded to a rubber or EPDM seal. These provide a reliable waterproof seal under the screw head in one combined component.
Corrugated Sheet Spacers
Plastic spacers used to maintain the correct gap between sheets and the fixing substrate. Helps prevent sheet distortion and allows for thermal movement.
Everything You Need To Know About Hex Head Cover Caps
Hex head cover caps are one of the most popular products in this range. They are used by roofing and cladding contractors to match the colour of the fixing point to the colour of the panel.
The TIMCO caps in this collection are made from plastic and have a matt finish. They are available in 16mm and 19mm diameters and fit an 8mm socket. Each cap snaps onto the hex head of the roofing screw after it is driven in.
Trade Tip: Always order the cap colour that matches your cladding panel. TIMCO caps are referenced by RAL colour codes. For example, Anthracite is RAL 7016, Heritage Green is RAL 6002, and Pure White is RAL 9010. Check your panel specification before ordering.
Available Colours And Sizes
The table below shows key cap options available in this collection. Colours are correct at the time of writing but availability may vary. Check the individual product pages for stock status.
| Colour Name | RAL Reference | Diameter | Pack Size | Socket Size |
|---|---|---|---|---|
| Anthracite | RAL 7016 | 19mm | 1000 pcs | 8mm |
| Heritage Green | RAL 6002 | 19mm | 1000 pcs | 8mm |
| Metallic Silver | RAL 7500 | 19mm | 1000 pcs | 8mm |
| Ultra Marine | RAL 5002 | 19mm | 1000 pcs | 8mm |
| Flame Red | RAL 3000 | 19mm | 1000 pcs | 8mm |
| Jade | RAL 6037 | 16mm | 1000 pcs | 8mm |
| Moorland Green | RAL 6000 | 19mm | 1000 pcs | 8mm |
| Slate Grey | RAL 7012 | 19mm | 1000 pcs | 8mm |
Choosing The Right Fixing For Corrugated Sheets
Corrugated sheet fixings are different from standard roofing screws. They are designed to fix through the crown of the corrugation and sit flush without distorting the sheet.
In this collection you will find a complete system for corrugated sheet work. This includes the corrugated sheet fixing itself, the sela washer for sealing, and the matching sela cover cap for a neat finish.
The Three-Part Corrugated Sheet Fixing System
- Corrugated Sheet Fixing: Available in black or clear plastic, 10 x 3 size, sold in packs of 50. Drives into the crown of the sheet and into the supporting structure.
- Sela Washer: Available in M6 x 28mm and M8 x 28mm versions, sold in packs of 75. Sits under the fixing head and creates a watertight seal.
- Sela Cover Cap: A 28mm plastic cap that clips over the fixing head. Sold in packs of 75. Gives a clean, professional finish over the fixing point.
Use the corrugated sheet spacer (15.0 x 19mm) when you need to maintain a set gap between the sheet and the fixing surface. This prevents sheet distortion and allows for thermal expansion.
Understanding Different Washer Types For Roofing And Cladding
Not all washers do the same job. Using the wrong type can lead to leaks, fixings pulling through, or premature corrosion. Here is a quick guide to the washer types in this collection.
| Washer Type | Material | Primary Use | Key Benefit |
|---|---|---|---|
| BAZ Washer | Stainless Steel (A2-304) | Roofing and cladding fixings | Large bearing area distributes load |
| Bonded Washer | Steel with EPDM seal | Metal sheet fixings exposed to weather | Combined metal and rubber seal in one piece |
| Sela Washer | Plastic | Corrugated sheet fixings | Creates a weatherproof seal under the fixing |
| Dowty Washer | Steel with bonded seal | General sealing applications | Metal rigidity with integrated soft seal |
Corrosion Note: For coastal or high-humidity environments, choose stainless steel BAZ washers (A2-304) rather than zinc or galvanised options. This reduces the risk of rust staining on the cladding over time.
Common Applications For Caps, Washers, And Sheet Fixings
These products are used across a range of construction and roofing applications. Here are the most common situations where tradspeople specify them.
Agricultural Buildings
Corrugated sheet fixings and sela washers are widely used on farm buildings. The cover cap system keeps the fixing points watertight and reduces maintenance over time.
Commercial Cladding
Hex head cover caps are specified on commercial cladding projects where fixing points must match the panel colour exactly. They are available in most standard RAL colours used in UK construction.
Residential Roofing
Bonded washers and BAZ washers are used on residential metal roofing systems to achieve a weatherproof fixing. They help maintain the roof warranty by sealing correctly around each fastener.
Industrial Sheds And Workshops
Corrugated sheet fixings in both black and clear are standard on industrial build projects. The 10 x 3 size is the most commonly used for light corrugated profile sheeting.
Trade Supply And Delivery From JALFT
JALFT is a UK trade fastener supplier based in Hull. We supply roofers, cladding contractors, builders, and metalworkers across the country.
Order before 2pm for next-day delivery. Free delivery applies to orders over £75. If you are local, Click and Collect is available from our trade counter at Anchor Trade Park, Wiltshire Road, Hull, HU4 6PA.
For high-volume trade orders, register for a trade account to access trade pricing and streamlined ordering. Our team can also help you specify the right products for your project. Call us on 01482 306 883 or email sales@jalft.com.
Frequently Asked Questions
What Is A BAZ Washer And When Should I Use One?
A BAZ washer is a large-diameter washer used to spread load across a wider surface area when fixing sheet materials. It is commonly used in roofing and cladding applications. TIMCO BAZ washers are available in stainless steel for corrosion resistance.
What Is A Sela Washer And How Does It Work?
A sela washer is a sealing washer used with corrugated sheet fixings to create a weatherproof seal around the fixing point. It sits under the fixing head and compresses slightly when tightened. A matching sela cover cap then snaps over the top to complete the system.
Are Hex Head Cover Caps Available In Different Colours?
Yes. TIMCO hex head cover caps are available in a wide range of colours including Anthracite, Heritage Green, Moorland Green, Metallic Silver, Ultra Marine, Flame Red, and many more. Each colour is referenced by a RAL code so you can match it to your cladding specification accurately.
Does JALFT Offer Next-Day Delivery On Washers And Caps?
Yes. JALFT offer next-day delivery on orders placed by 2pm. Free delivery is available on orders over £75. Click and Collect is also available from the trade counter in Hull for local customers.