Auto tc 4.8×32 aisi 316 domed – code: a4-7981-04.8×032 – Osculati

Osculati self-tapping screw in AISI 316 for neat fixings

The Self-tapping screw 4.8×32 AISI 316 domed Osculati (supplier code a4-7981-04.8×032) is a self-tapping screw designed for fixing interventions where stainless steel small parts and practical installation are desired. It is a typical solution for contexts marine and plant engineering, where the choice of material and the quality of the finish are important aspects in maintenance and installations.

The product is identified by the manufacturer with references UNI 6954 and DIN 7981, useful for those who need to maintain consistency with small parts standards already present onboard or in the workshop. The indicated size is 4.8×32.

Product features and details

Material: stainless steel AISI 316

The screw is made of AISI 316 stainless steel, a material commonly chosen in nautical fields and applications exposed to demanding environments. The use of stainless steel allows maintaining small parts consistent with stainless steel components and accessories, reducing the need for frequent replacements due to surface oxidation typical of unsuitable materials.

Type: self-tapping screw

Being a self-tapping screw, it is suitable for fastenings where the threading is generated during screwing into the support. In maintenance and installation, this can simplify some operations, provided attention is paid to hole preparation and base material compatibility.

Head and finish

The product description shows the version pan head. In practice, the choice of head affects the final appearance of the fastening and how the screw rests on the surface. To achieve a clean and functional result, it is always advisable to check the pairing with washers, seats, or accessories already present and evaluate the desired aesthetic effect.

Size and identification

• Size: 4.8×32
• Supplier code: a4-7981-04.8×032
• References: UNI 6954 / DIN 7981
• Supplier: Osculati S.r.l.

When reordering or managing spare parts, the supplier code is the safest reference to avoid ambiguity between similar variants.

Typical applications (nautical and plant engineering)

This self-tapping screw in AISI 316 is used in many activities of onboard maintenance and in technical installations where reliable and neat fastening is required. In particular, it is often chosen when working on accessories and components that require stainless steel small parts for material consistency and better long-term resistance compared to non-stainless screws.

Examples of use

• Fixing accessories on paneling, cladding, or finishing elements (depending on the support).
• Light plant installations where a self-tapping screw is preferred for quick installation.
• Restoration interventions and replacement of existing screws with stainless steel equivalents.
• Fittings and refitting where it is desired to standardize the small parts to indicated DIN/UNI standards.

The final choice always depends on the support material and the type of component to be fastened: in case of doubt, it is advisable to perform a test on a non-critical area or consult the component manufacturer's instructions.

Usage and operational notes

Hole preparation and support compatibility

With self-tapping screws, correct hole preparation is crucial for a regular installation. In general, it is good practice to:

• check that the Ready to use and easy to manage be suitable for a self-tapping screw;
• perform a pilot hole when necessary, depending on the material and thickness;
• avoid forcing that could damage the generated threading or the fastened component.

If working on delicate materials or structurally important elements, it is advisable to follow the procedures provided by the component or system manufacturer.

Material pairings

In the nautical field, pairing between different metals is common. To limit issues over time, it is appropriate to evaluate the combination between the stainless steel screw and the support material, as well as the possible use of separation accessories (e.g., washers or suitable interpositions) when provided by the application.

Good assembly practices

• Use the’tool adequate and in good condition to avoid damaging the screw drive.
• Tighten progressively, checking the alignment of the component.
• In case of future disassembly, consider accessibility and maintenance possibility.

For reorders and replacements, refer to the code a4-7981-04.8×032 to ensure correspondence with the Osculati version.

FAQ – Frequently Asked Questions

What is the material of the Osculati self-tapping screw?

The screw is made of AISI 316 stainless steel, suitable for nautical and plant engineering applications where stainless small parts are preferred.

What is the size of this screw?

The indicated size is 4.8×32.

What is the Osculati product code for reordering?

The supplier code shown is a4-7981-04.8×032.

To which regulatory references is it associated?

The manufacturer references UNI 6954 and DIN 7981.

Is it suitable for onboard maintenance and installations?

Yes, it is a self-tapping screw in AISI 316 commonly chosen for practical fixings in nautical and plant engineering. It is still important to verify compatibility with the support and properly prepare the hole.