A4 Slotted Hex Head SUPER Self-Tapping Screw (Polyamide Washer)
This SUPER screw is not only triple the hardness to an ordinary screw, but is even more corrosive resistant than A2 stainless steel screws. A4 (316) grade material is perfect for outdoor use as it will not rust. These screw may cost more now, however, can save you majorly in the long run.
The slotted head type means that only a slotted screwdriver will work for the job. This screw is not suitable for high torque transfers. This is because the force, by the driver, is applied to the diagonally opposite outer edges of the slot.
As this is a self-tapping screw, the full thread means that the screw can easily tap it's own hole as it is driven into the material. These are often used with hard materials such as metals and hard plastics.
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Free Next Day Delivery!
Order before 2pm on a work day and next day delivery is offered on all our standard products to UK mainland customers.We offer free delivery for all orders over £50 (ex VAT). (UK Mainland Only).
We now offer a morning delivery service to receive your goods either before 12 or even 10:30 (UK Mainland Only)
Before 10:30 – £17
Before 12 – £10
A Saturday delivery is offered to UK mainland customers.You will receive an email where you can confirm the delivery price if you are happy with it. Different package weights will have different prices.
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Below is the standard tariff for guidance purposes. Actual costs will be confirmed at point of sale and any variances you will be notified within 24 working hours of receipt of order.