Washer 4 aisi 316 – code: a4-125-04 – Osculati

Flat washer “Washer 4” in AISI 316 stainless steel Osculati

The Washer 4 in AISI 316 stainless steel by Osculati (supplier code a4-125-04) is a small hardware component designed to complete fastenings with screws and nuts in an orderly and consistent way. Used as support surface between the clamping element and the part to be fixed, helps to better manage assemblies and maintenance activities in contexts where stainless steel hardware is used, such as boating and onboard systems.

The manufacturer's reference to the family of standard flat washers with reference to standards UNI 6592 and DIN 125 is useful for those who need to keep technical sheets, spare parts, and components aligned, especially when working with mixed supplies or performing restorations on existing systems.

Product features and details

Material: stainless steel AISI 316

The washer is made of AISI 316, a common choice when continuity with stainless steel hardware used in nautical environments and applications exposed to demanding conditions is desired. From a maintenance perspective, using homogeneous components by material facilitates warehouse management and assembly consistency.

Type: “normal” flat washer”

It is a flat washer, indicated to create a support between:

• screw head and the surface of the component, or
• nut and the surface of the component.

This configuration is typical of fastenings where a more regular contact and a neater finish of the fastening point are desired.

References to standards: UNI 6592 and DIN 125

Osculati places the product in the family of standard flat washers with reference to UNI 6592 and DIN 125. This reference is particularly useful for:

• more easily recognizing the type of washer during procurement;
• maintaining consistency among components in the bill of materials;
• simplifying replacement during maintenance interventions.

Note: the reference to the standard does not replace the dimensional verification necessary for matching with existing screws, nuts, and holes.

Product identification

• Supplier: Osculati S.r.l.
• Supplier product code: a4-125-04
• Commercial description: Washer 4 AISI 316

Typical applications (nautical and onboard plant engineering)

This washer is indicated as a small hardware component for assemblies and maintenance where stainless steel hardware is used. In the nautical and plant engineering fields, it can be used in many operational situations, for example:

• assembly of onboard components and accessories that require fastening with screw and nut;
• restoration of clamping points during routine maintenance interventions;
• integration in spare parts and small parts kits for technical assistance;
• mounting on panels, brackets, supports, and small parts where a dedicated support surface is useful.

In general, the flat washer is chosen when a cleaner and more manageable fastening is desired, especially in the presence of surfaces that benefit from a more regular support between the clamping element and the component.

Usage and notes for selection

Check compatibility with screws/nuts and holes

Before installation, it is advisable to verify compatibility with:

• diameter of the screw or stud used;
• hole size and seat geometry;
• type of nut or screw head and available space.

In case of replacement on existing systems, it can be useful to compare the removed washer with the new one, so as to maintain the clamping configuration unchanged.

Good maintenance practices

• Use washers made of material consistent with the hardware already installed, when required by the project or maintenance.
• Store washers in a small parts kit identified by code, to speed up onboard interventions.
• During reassembly, check that the support surfaces are clean and that the washer is correctly positioned.

Instructions for purchase and replacement

For quick reorders and to avoid ambiguity during procurement, refer to the supplier code a4-125-04 and the description Washer 4 AISI 316. This approach is particularly useful when managing multiple washer variants or when working on bills of materials with standardized components.

FAQ – Frequently Asked Questions

What is the Rondella 4 Osculati a4-125-04?

It is a “Rondella 4” flat washer in AISI 316 stainless steel supplied by Osculati, identified by the product code a4-125-04.

What is the purpose of a flat washer in a fastening?

It is placed between the bolt head or nut and the part to be tightened, creating a dedicated bearing surface and contributing to a neater assembly.

What is the material of the washer?

The washer is made of AISI 316 stainless steel.

Are reference standards indicated for this washer?

Yes. The manufacturer places it in the family of standard flat washers with reference to UNI 6592 and DIN 125 standards.

In which contexts is it typically used?

It is a small hardware component used in assemblies and maintenance in nautical and onboard plant engineering contexts, where stainless steel hardware is used.