Washer 5 aisi 316 – code: a4-125-05 – Osculati

Flat washer in AISI 316 stainless steel Osculati – size 5 (code a4-125-05)

The standard flat washer Osculati in AISI 316 stainless steel, identified by size 5 and supplier code a4-125-05, is a small hardware component designed to complete fastenings with stainless steel screws in an orderly and consistent way. In the nautical field and onboard systems, the use of the washer is a practical choice to achieve cleaner tightening and to protect the bearing surface when working with screws and nuts.

Indicated as belonging to the series UNI 6592 / DIN 125, this washer falls under the “standard flat” type, commonly used in maintenance, repairs, and new installations where standardizing hardware and simplifying spare parts management is desired.

Features and details

Material: AISI 316

The declared material is AISI 316, a typical choice for applications where stainless steel hardware is preferred in technical and marine contexts. The use of stainless steel components helps maintain consistency with bolts and screws of the same material, reducing finish differences and facilitating routine maintenance.

Type: standard flat washer

It is a flat washer (non-elastic), used as a support element between the screw head (or nut) and the surface of the component to be fastened. The main function is to provide a more even support during tightening and to contribute to a better distribution of the load on the surface.

Reference series: UNI 6592 / DIN 125

The washer is indicated as belonging to the series UNI 6592 / DIN 125. This reference is useful during selection and procurement because it helps maintain uniformity among components, especially when working on systems or fittings where hardware standardization is important.

Product identification

• Brand / supplier: Osculati S.r.l.
• Supplier code: a4-125-05
• Indicated size: 5

Typical applications (nautical and onboard plant engineering)

This washer is suitable for many situations where stainless steel screws and nuts are used, particularly in nautical and technical contexts.

• Maintenance and restoration of existing fastenings, when replacing screws or reorganizing hardware.
• New installations on onboard accessories and components, where a more even support under the screw head or nut is desired.
• Plant engineering and brackets (in general), when it is useful to protect the contact surface during tightening.
• Spare parts management onboard or in the workshop, to maintain a consistent supply of stainless steel small parts.

Usage and operational notes

Correct positioning

The flat washer is normally positioned under the screw head o under the nut, in contact with the surface of the component to be fastened. In this way, it acts as a support element and helps make the tightening more even.

Size selection

The size indicated for this item is 5. When selecting, it is good practice to check that the washer size is consistent with the screws used and the available space in the mounting area. If working on an existing system, it can be useful to compare the washer with the one already installed or with the spare parts list.

Material consistency

To maintain a uniform fastening, it is generally preferable to match the washer with screws, nuts, and other stainless steel small parts. This approach also simplifies maintenance management and component replacement over time.

Note for purchase and spare parts

To quickly identify the product when ordering or restocking, refer to the Osculati code a4-125-05. This is particularly useful when managing multiple sizes or variants of washers in stock, in the workshop, or onboard.

FAQ – Frequently Asked Questions

What type of washer is this Osculati item?

It is a standard flat washer made of AISI 316 stainless steel, indicated as belonging to the UNI 6592 / DIN 125 series.

What is the purpose of a flat washer under a screw or nut?

It is used as a support element to distribute the load during tightening and to help protect the contact surface under the screw head or nut.

What is the indicated size for this washer?

The size indicated for this item is 5.

What is the Osculati product code for reordering?

The Osculati supplier code is a4-125-05.

Is it suitable for use in nautical and onboard systems?

Yes, it is a hardware component commonly used in nautical and onboard systems, both in maintenance and new installations, when a neat fastening with stainless steel screws is desired.