Wide washer 10×30 aisi 316 – code: a4-9021a-10×030 – Osculati

Wide washer 10×30 in stainless steel AISI 316 (Osculati)

The wide flat washer 10×30 in AISI 316 stainless steel is a hardware component designed to complete assemblies with stainless steel bolts in contexts where a wider bearing surface than a standard washer is needed. This model, supplied by Osculati S.r.l. with supplier product code a4-9021a-10×030, it is suitable for applications in the nautical and onboard plant engineering fields, where attention to detail and material consistency are important aspects in maintenance and assembly.

The “wide” geometry helps to distribute the tightening load over a larger surface, helping to protect the contact area under the screw head or nut. It is a practical choice when working on surfaces you want to preserve, or in the presence of enlarged holes o slots, where a standard washer might provide less adequate support.

Features and details

Type: wide flat washer

It is a flat washer with increased outer diameter (“wide” version), designed to increase the support area at the tightening point. In a typical assembly, the washer is placed between the contact surface and the screw head or nut, aiming to improve pressure distribution and reduce the risk of marking or damaging the underlying material.

Material: stainless steel AISI 316

The use of AISI 316 makes this washer suitable for installations where stainless steel components are preferred to maintain uniformity with the bolts and other metal elements of the assembly. In the nautical field, the choice of material is often linked to durability needs and compatibility with the usage environment, as well as consistency with parts already on board.

Size: 10×30

The washer is identified by the size 10×30. When selecting, it is good practice to verify the match with the screw/nut and with the hole or slot present on the support, to achieve proper support and orderly tightening. The “wide” version is particularly useful when you want to increase the contact surface without changing the general fastening setup.

Product identification

• Supplier: Osculati S.r.l.
• Supplier product code: a4-9021a-10×030
• Category: Hardware (HYDRAULICS AND HARDWARE)

Typical applications (nautical and onboard plant engineering)

This wide washer is used in many mounting and maintenance situations, especially when it is important to obtain a wider and “cleaner” support under the fastening element. Below are some recurring applications in the nautical and plant engineering fields:

• Assemblies with stainless steel bolts: ideal to complete fastenings where material consistency between screw/nut and washer is desired.
• Mountings on surfaces to protect: useful when you want to reduce tightening marks and better distribute pressure.
• Presence of enlarged holes or slots: the wide geometry can offer more adequate support compared to a standard washer.
• Maintenance interventions: practical component to restore or improve existing fastenings, replacing worn or unsuitable washers.
• On-board plant installations: general use in brackets and fastenings where it is useful to increase the contact area at the tightening point.

Usage and operational notes

Choosing the washer based on the fastening

Before installation, it is advisable to verify that the measurement 10×30 be consistent with the screw/nut used and the support. In particular, when working with enlarged holes or slots, a wide washer can improve support, but it is always advisable to evaluate that the available contact surface is sufficient and that tightening occurs stably.

Correct positioning

The washer should be placed between the screw head (or nut) and the surface to be tightened. A clean and well-centered support helps achieve more even tightening. When replacing, it is good practice to remove any residues or marks that could compromise adhesion between surfaces.

Maintenance and replacement

In maintenance contexts, the washer is a simple but important component: if deformed, marked, or no longer suitable for the type of hole, it can affect the quality of the tightening. Replacing it with a wide stainless steel washer is a practical solution to restore an orderly fastening consistent with the existing bolts.

Note on compatibility and bolt selection

To achieve a consistent assembly, it is advisable to match the washer with bolts suitable for the material and application. If you have doubts about the choice of the screw/nut/washer combination or sizing relative to the support, it is preferable to check your system's specifications or compare the product code a4-9021a-10×030 with the bill of materials for your intervention.

FAQ – Frequently Asked Questions

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

It is a flat washer with an outer diameter larger than a standard washer. It serves to increase the bearing area under the screw head or nut, helping to distribute the tightening load and protect the contact surface.

Is this washer suitable for nautical use?

It is a stainless steel AISI 316 hardware component, suitable for assembly and maintenance in the nautical and onboard plant sector, where stainless materials and solutions with wide bearing surfaces are often preferred.

When is it convenient to choose a “wide” washer instead of a standard one?

When a wider bearing surface is desired, for example to better distribute the tightening pressure, protect the surface, or work with enlarged holes or slots.

What is the Osculati product code for this washer?

The supplier product code is a4-9021a-10×030 (Osculati S.r.l.).

With which bolts can I pair it?

It is designed to be paired with stainless steel bolts in installations where material consistency is desired. For the correct choice based on your fastening, check compatibility with the screw/nut and with the hole or slot of the support.