Auto ts 4.8×22 aisi 316 countersunk – code: a4-7982-04.8×022 – Osculati

Osculati self-tapping screw in AISI 316 for neat fixings

The Auto TS 4.8×22 in AISI 316 stainless steel is a self-tapping screw designed for assembly and maintenance tasks where corrosion-resistant hardware suitable for technical contexts, including nautical ones, is needed. This item is offered by Osculati S.r.l. with supplier product code a4-7982-04.8×022, useful for quick identification, reorder and spare parts management.

The indicated version is countersunk, a typical choice when a more flush finish with the surface is desired, reducing protrusions and improving assembly neatness. As with any self-tapping screw, correct size selection and support verification remain central elements to achieve a clean and application-consistent fastening.

Product features and details

Material: stainless steel AISI 316

The’AISI 316 is a stainless steel commonly chosen in nautical and plant engineering fields for its suitability in humid and potentially aggressive environments. It is a recommended solution when surface oxidation phenomena need to be limited and to maintain an orderly hardware appearance over time, especially on exposed installations.

Type: self-tapping screw (Auto TS)

The self-tapping screw is designed to create its own thread in the support material during screwing. This approach can be practical in many assembly and maintenance operations, reducing steps and simplifying installation, provided good drilling/guide practices are followed when necessary and the support is correctly chosen.

Countersunk head

The countersunk head is indicated when the goal is to achieve a fastening with a more flush or less protruding finish compared to a pan head. It is a frequent choice on paneling, accessories, and components where protrusion could interfere with fittings, sliding, or simply the assembly aesthetics.

Item identification and codes

• Product: Auto TS 4.8×22 AISI 316 countersunk
• Supplier: Osculati S.r.l.
• Supplier product code: a4-7982-04.8×022
• SKU: oscu0000001443

For repeated purchases or to align bills of materials and scheduled maintenance, the use of the supplier code is particularly useful: it helps reduce ambiguity between similar items and maintain consistency in replacements.

Typical applications (nautical and plant engineering)

This stainless steel self-tapping screw is suitable for a variety of uses requiring stainless hardware and practical installation. In nautical and onboard plant engineering, it can be used in outfitting, restoration, and component fastening operations, always considering the support material and the thickness to be clamped.

Examples of use

• Fittings and finishes: fastening of small accessories and components where a countersunk head is preferred for a neater finish.
• Maintenance and spare parts: replacement of existing screws with an item identified by code, useful for maintaining hardware uniformity.
• Installations on panels and supports: applications where reducing protrusions can be a functional advantage.
• Interventions in humid environments: contexts where the choice of AISI 316 stainless steel is common to limit oxidation.

Note: The final suitability depends on the type of material being screwed into (and its condition), the possible need for a pilot hole, and the available tool. In case of doubt, it is advisable to perform a test on a sample or consult the mounting instructions of the component to be fastened.

Usage and installation notes

Support verification and preparation

Before installation, check that the support is suitable for a self-tapping screw and that the thickness to be fastened is consistent with the chosen size. In some materials or configurations, it may be appropriate to prepare a pilot hole to facilitate screwing and reduce the risk of damage to the support or the screw.

Tightening and fittings

During tightening, work progressively and without forcing beyond what is necessary. In the presence of fittings between different metals or in particularly exposed environments, consider the good practices typical of stainless steel hardware (for example, attention to possible galling phenomena and material compatibility), choosing any mounting accessories consistently with the application.

Final check

After installation, check that the countersunk head is properly seated and that the fastened component does not show play or abnormal stresses. In applications subject to vibrations or load cycles, it is good practice to schedule periodic checks according to the maintenance plan of the plant or vessel.

FAQ – Frequently Asked Questions

What is the Auto TS 4.8×22 screw?

It is a self-tapping screw (Auto TS) made of AISI 316 stainless steel, size 4.8×22, with a countersunk head. It is designed for practical fastening in technical fields, including nautical applications.

What is the advantage of the countersunk head?

The countersunk head is suitable when a flush or less protruding finish on the surface is desired, useful on panels and components where the head's bulk needs to be reduced.

What is the code a4-7982-04.8×022 used for?

It is the product code from the supplier Osculati S.r.l. and allows unique identification of the item for reorders, replacements, and spare parts management.

Is it suitable for nautical use?

AISI 316 stainless steel is commonly chosen in nautical environments and humid conditions. The final suitability depends, however, on the support and installation conditions.

Is a pilot hole needed to install it?

It depends on the material and the fastening configuration. In some cases, a guide hole can facilitate screwing and improve assembly quality; it is advisable to evaluate based on the support.