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A4 Acid-Proof Stainless Steel Decking Screws 5.5 x 70 mm

4.49 (incl. VAT) (0.45/pc)
Article no: 40-9548-1
  • Handy screw for using near salt water, beside the pool, etc.
  • Very suitable for heavier structures below the waterline, such as piers.
  • Acid-proof, marine grade A4 stainless steel, also recommended for hardwoods.
  • Rated at the highest corrosion class C5, perfect for coastal areas and other extreme environments.
Stock status
Web stocks In stock
Availability in store
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  • Reading, Broad Street
Marine grade decking screw rated at the highest corrosion class C5, perfect for coastal areas and other extreme environments.

The screw is partially threaded which helps clamp the top piece of timber securely against the underlying piece of timber. The shank also has a double helix to help remove debris form the hole and improve clamping even under low loads. The slash point tip of the screw cuts through the fibres of the wood efficiently for improved driving and less likelihood of splitting when the screw is inserted close to the edge of the timber. The ribs underneath the head of the screw help when countersinking into timber for a smooth finish with no protrusions.

Decking screw made of acid-free marine grade A4 stainless steel. The screw is much harder than a regular stainless steel screw and is recommended for use with hardwoods such as larch. Quick-drive screw with a high corrosion resistance making it ideal for exterior use near salt water, pools, etc. Also good for use on constructions which are exposed to water or below the waterline such as jetty posts, concrete moulds and uncovered decking.

The screw head has a T25 recess to provide a good drive with minimal risk of camming out.

Product Specifications

Number in pack 10 pc
Type of screwdriver bit T25 
Head Countersunk 
Fully threaded No 
Corrosion protection class C5 
Stainless steel Yes 
Length 70 mm
Diameter 5.5 mm
Material A4 acid-resistant stainless steel 
Packaging size 9 x 5 x 2.8 cm
Packaging weight 86  g

Shopping info, delivery & returns

At Clas Ohlson you can always shop securely and quickly. You will always have an open return policy up to 90 days. Your order will usually be dispatched within 2-3 days. Exception to this is the busy season such as Christmas.

Usual questions about returns

Clas Ohlson offers 2 year

Except where we state otherwise, we provide a two year guarantee on our products to cover materials and manufacturing defects and other defects that affect the product?s normal functioning under the guarantee period. This excludes consumable products, such as lightbulbs and batteries, which by their nature cannot be returned in a new or unused condition. For further information on other such consumable products excluded from the guarantee, please contact our customer service department on 0845 300 9799.

Read more in our terms and conditions of purchase

Clas Ohlson offers 2 year

Money back

Are you not happy with your purchase or have you changed your mind? Don't worry, at Clas Ohlson you will always have an open return of 90 days. To get your money back you must:

  • Show the receipt.
  • Return the product within 90 days.
  • Return the product and accessories in the same condition as they were when you bought them.

Read more about returns in our terms and conditions of purchase