M4, M5, M6 and M8 Marine “U” Bolts A4 Stainless Steel
Sizes: M4 (4mm), M5 (5mm), M6 (6mm) and M8 (8mm)
Choice of Multi Pack
Bolt Thickness Size: M4 (4mm), M5( 5mm), M6 (6mm) – M8 (8mm)
Bolt Height: 62-100mm
For more technical data please see the technical picture.
Note: Pictures are for ilustration only and do not indicate the quantity purchased.
Description/Usage: A U–bolt is a bolt in the shape of the letter U with screw threads on both ends. U–bolts have primarily been used to support pipework, pipes through which fluids and gasses pass. As such, U–bolts were measured using pipe-work engineering speak.
General Description for A4 Stainless Steel
A4 Stainless Steel is durable steel for maximum corrosion resistance.
What is A4 Stainless Steel?
A4 grades of stainless steel are usually reserved for use in highly caustic environments where improved resistance to pitting corrosion is required, i.e Marine, exhausts. Pitting corrosion occurs once the chromium becomes exhausted through self-passivation after caustic attack – the effects as usually local to the exposed areas. The pitting forms as the Iron atoms become exposed to Oxygen and form ‘rust’. The improved resistance comes from the addition of a higher proportion of Chromium, which helps to form a protective oxide layer on the iron – the more chromium you have the longer the protection it offers lasts.
Counting Tolerances: We make every effort to count fasteners accurately using our professional counting weighing scales. As these scales are extremely sensitive, the slightest change in the working environment can have an effect on the instrument. Please rest assured that we expect over 99% of our orders to be correctly counted and packed, but we would like to advise you that a 5% tolerance either greater than or less than what you have ordered may be shipped. This will generally apply to the smaller ranges in our catalogue.