Wide washer 6×18 aisi 316 – code: a4-9021a-06×018 – Osculati

Wide flat washer 6×18 in AISI 316 stainless steel (Osculati)

The wide washer 6×18 in AISI 316 stainless steel it is a small part designed to be placed between screw/nut and the support surface, when a wider contact base than a standard washer is needed. This model is supplied by Osculati and is identified by the supplier product code a4-9021a-06×018.

In the nautical field and in the’onboard systems, the choice of the correct washer is a detail that makes a difference during assembly, maintenance, or refitting: a wide washer helps better manage the support of the tightening on different surfaces and materials, maintaining a neat and professional installation setup.

Product features and details

Type: wide flat washer

It is a flat washer in version wide, designed to increase the contact area between the fastening element and the support. It is a common choice when:

• you want a wider support surface compared to a standard washer;
• you want finish the tightening point with a dedicated component;
• working on supports where it is useful to distribute the load over a larger area.

Material: stainless steel AISI 316

The washer is made of AISI 316 stainless steel, material frequently used in nautical contexts and in applications exposed to demanding environments. The choice of AISI 316 is typical when looking for stainless steel small parts suitable for onboard installations and components.

Size: 6×18

The indicated measurement is 6×18. When selecting, it is important to check compatibility with:

• the bolts (screw or stud) used;
• the nut and any additional washer provided by the assembly;
• the hole and the geometry of the support on which the washer will rest.

Note: for a correct assembly, the washer must rest stably and completely on the surface, without interfering with edges, slots, or fillets of the support.

Supply and identification

• Supplier: Osculati S.r.l.
• Supplier product code: a4-9021a-06×018

The reference to the supplier code is useful for those who need to maintain supply consistency, replacements in maintenance, or alignment with bills of materials.

Typical applications (nautical and plant engineering)

This wide flat washer is suitable for general uses of hardware and onboard systems, where stainless steel small parts are commonly required. Some recurring examples of use include:

• Assemblies of accessories and components on structures and supports, when it is useful to increase the clamping bearing area.
• Maintenance and replacements of existing bolting, maintaining a neat and consistent configuration with the installation.
• Refitting and restoration interventions, where it is desired to improve the finish of the clamping point and better manage the support on not perfectly uniform surfaces.
• Assemblies in which the washer helps create a bearing interface between nut/bolt and support material.

In general, the wide washer is chosen when a simple and standardized solution is desired to increase the contact surface, without modifying the main bolting.

Usage and operational notes

Compatibility check

Before installation, it is advisable to check:

• that the size 6×18 is correct for the screw/stud and for the available bearing area;
• that the washer does not interfere with seats, shoulders, slots, or moving parts;
• that the contact surface is adequate and allows for uniform support.

Correct positioning

In a typical assembly, the washer is placed between the head of the screw (or the nut) and the support. The goal is to achieve stable support and a neat finish of the clamping. In the case of painted or treated surfaces, it is good practice to evaluate the effect of clamping on the coating, based on the installation requirements.

Spare parts and maintenance

In onboard maintenance, it is useful to keep a stock of washers of the most used sizes. For punctual replacements or alignment with existing components, refer to the Osculati code a4-9021a-06×018 helps to quickly identify the product.

Practical purchase advice

If you are replicating an existing assembly, check the size directly on the installed component or on the bill of materials. If you are designing a new assembly, consider the available space around the hole and the necessary bearing surface, choosing the wide washer when a wider base is needed.

FAQ – Frequently Asked Questions

What is a wide flat washer and what is it used for?

It is a flat washer with a larger support surface compared to a standard washer. It is placed between the screw/nut and the support to increase the contact area and refine the tightening point.

Is this washer made of AISI 316 stainless steel?

Yes, the product is made of AISI 316 stainless steel, a common choice for small parts in nautical and onboard plant engineering.

What is the size of the washer?

The indicated size is 6×18. It is advisable to check compatibility with the bolts used and with the hole/surface of the support.

What is the Osculati code for this item?

The Osculati supplier product code is a4-9021a-06×018. It can be useful for reorders and replacements in maintenance.

In which contexts is it typically used?

It is used in assemblies, maintenance, and refitting in nautical and onboard plant engineering when a wider support base is desired between the fastening element and the surface.