High-Performance Bi-Metal Self-Drilling Screw
The 5.5 X 38MM HS SS Hex Selfdrill Bi-Metal Washered Self-Drilling Screw A2 is a premium fastening solution designed for secure fixing into steel without the need for pre-drilling. Its bi-metal composition features a hardened carbon steel drill point for efficient penetration, seamlessly fused with an A2 stainless steel body that offers outstanding corrosion resistance—making it ideal for external cladding, roofing and façade applications in harsh environments.
The hexagonal head with pre-assembled stainless steel washer and bonded EPDM seal ensures a watertight finish while distributing pressure evenly to prevent damage to surfaces. This screw is perfect for use in applications requiring high pull-out strength and rust protection, even in coastal or industrial locations. Quick to install with a secure bite into substrate, it helps reduce installation time and long-term maintenance costs.
Whether used in construction, fabrication or renovation projects, this self-drilling screw offers long-term reliability and performance in demanding conditions.
We aim to despatch our customer orders as quickly as possible. For orders placed online and where the items are held in stock the goods will be usually despatched within the displayed expected delivery timescale.
If for any reason delivery is delayed we will notify you.
We deliver to Mainland UK addresses, the following delivery services are available:
Standard next day delivery
| For orders over £199 (excluding signage) | F.O.C. |
For orders below £199
| For orders under £199 (excluding signage) | £9.00 |
Specialist delivery
| Specialist delivery service (e.g. signage): | POA |
Enhanced delivery options
For priority timed deliveries, weekend or options outside of mainland UK, please contact us for a quotation.
Returns & Cancellation
Trade customers
Faulty, damaged or incorrectly supplied goods
In accordance with our Terms & Conditions of Sale, faulty or damaged goods may be returned if these have been inspected upon delivery or where not possible, signed for them as “not examined” and that we have been notified within 3 working days from receiving the goods.
Incorrectly delivered items must be returned in their original condition, in unopened packaging, as delivered, with proof of purchase.
Unwanted or incorrectly ordered goods
If an order has been placed incorrectly, and that we have been notified within 3 working days from receiving the goods, we may at our discretion agree a return of the goods, however these will be subject to a 20% restocking charge.
Where an item is bespoke or has been decorated returns will not be accepted.
Consumers
Cancellation
If ordering goods as a consumer you have a statutory right to cancel the order for any reason and receive a full refund including any standard delivery charges. To exercise your right you must notify us by email/post/phone within 14 calendar days from order acceptance or from receiving the goods. If the order is delivered in installments, the time-frame ends 14 calendar days after you receive the final installment. This does not apply to bespoke or decorated goods.
Goods must be returned within 14 days from cancellation of order and you will be responsible for returning the goods at your own cost. Any refunds owed will be paid within 14 calendar days, using the same payment method used on the original order.
Returns
You may return faulty, damaged or incorrectly supplied goods within 30 days from receiving them. Goods should be returned in their original condition and we will issue a replacement or refund.
Any refunds owed will be paid within 14 calendar days, using the same payment method used on the original order, including delivery and returns costs.