Do You Know What Types of Nuts and Bolts Are Suitable as Marine Fasteners?

Whenever we think about fasteners then we would mean any of the following:

Nuts and Bolts

  • Bolts
  • Screws
  • Washers
  • Nuts
  • Togglers
  • Nails
  • Rivets
  • Hanger bolts

There can also be many more in the above list. The basic function of all these fasteners is to hold tightly two different parts together. There may be different shapes for every type of fastener. Besides, you can also, find them in many different sizes.

Quite a few of these fasteners has got a name that is intuitive such as:

  • Flat head wooden screw
  • Hex head bolt
  • Carriage bolts
  • Hex nut
  • Flat washer
  • Escutcheon pins
  • Castle nuts
  • Cheese head screws

Sizing conventions can be a little clearer and more in line with the present day. Most sizes are identified by a number or by their actual size (in inches or millimetres).

Understanding what you are searching for by name will simplify your search for what you require and help you eliminate a large amount of the fastener aisle. For example, when you look for marine grade nuts and bolts then the materials used for the fasteners will be special.

In the marine environment, fastener materials are subjected to 5 primary conditions or zones, which are as follows:

Nuts and Bolts

  • Marine atmosphere,
  • Splash
  • Tidal
  • Full-immersion
  • Mud zones.

Depending on the substance, each of these settings offers varying levels of corrosiveness. Other aspects of seawater, in addition to all these corrosion zones, that can influence fastener corrosion resistance are:

  • Seawater velocity,
  • Pollutants
  • Temperature
  • Hydrogen evolution due to electrochemical reactions

“Marine fasteners” is a general term that can always refer to anything from hanger screws, bolts, nuts, rivets, and bolts to nails, rivets and togglers. Similar to conventional fasteners, the main function of all these kinds of fasteners is also to clamp two materials together.

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However, there are numerous thicknesses, lengths, and forms available for marine fasteners. In order to ensure that you are correctly specifying the appropriate fastener, it is crucial to understand the various language used.

Some fasteners, such as flat head screws and hex bolts, have a good reputation in the industry and their names make it quite simple to picture what they are going to look like and what function they are going to serve in boat construction. Other fasteners still go by archaic names that are often difficult to comprehend, like carriage bolts or cheese head screws.

When choosing fasteners for boat construction, stainless steel is frequently recommended as the best material to utilize. Although other materials, such as bronze and zinc coated, offer advantages and suitable uses, most boaters concur that stainless steel will be the most resilient material to use with an extra advantage of corrosion resistant material.


When selecting the stainless-steel grade that you require, it is frequently preferable to use higher grades because they will provide a fastener with greater corrosion resistance. Fasteners often come in one of the following three stainless steel grades:

  • 18-8,
  • 304
  • 316

However, it will be best to select stainless steel, which is in grade 316 for your marine application projects.


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