Countersunk auto ts 4.8×50 aisi 316 – code: a4-7982-04.8×050 – Osculati

Osculati self-tapping screw in AISI 316 for neat fixings

The Osculati self-tapping screw in AISI 316 stainless steel It is a hardware solution designed for those seeking a practical and clean fastening in technical contexts, particularly in nautical and onboard plant engineering. The product is identified by the supplier code a4-7982-04.8×050 (SKU oscu000001446) and is indicated by the manufacturer as belonging to the family UNI 6955 / DIN 7982.

This version is described as countersunk and in size 4,8×50, useful when a more integrated finish with the surface and a neat visible appearance is desired. As with every self-tapping fastener, the correct choice depends on the supporting material and the actual installation conditions: for this reason, it is advisable to always verify the intended application before assembly.

Product features and details

Material: stainless steel AISI 316

The screw body is made of AISI 316, a stainless steel alloy commonly used in nautical applications and environments where durable hardware suitable for technical contexts is preferred. The use of stainless steel allows maintaining a neat and consistent appearance with onboard components and accessories, reducing the need for frequent replacements due to surface oxidation typical of unsuitable materials.

Type: self-tapping screw

The screw is a self-tapping, therefore designed to create its own thread in the supporting material during screwing. This feature is often chosen when a quick assembly is desired and when the use of nuts or pre-existing threads is not planned. In nautical contexts, it can be useful in many outfitting, repair, and maintenance operations, provided the support is compatible with this type of fastening.

Countersunk head

The product description indicates a countersunk head, suitable when a flush or less protruding fastening compared to solutions with a rounded head is desired. The choice of head affects the final aesthetics and functionality (for example, when reducing bulk or contact points is desired). For a correct result, it is important that the seating is adequate and that the installation is carried out carefully, avoiding damage to the surface.

Size 4.8×50

The size 4,8×50 is indicated by the manufacturer and must be selected based on the thickness of the materials to be joined and the type of support. When choosing, it is good practice to consider:

• the overall thickness of the elements to be fastened;
• the nature of the support (material, density, possible layering);
• the accessibility of the work area and the possibility of pre-drilling, if necessary.

Manufacturer references

The product is associated by the manufacturer with the family UNI 6955 / DIN 7982. This reference helps to frame the type of screw within a classification known in the hardware sector. In case of replacement or comparison with existing components, the declared code and family can facilitate the identification of the correct spare part.

Identifying data

• Brand / Supplier: Osculati S.r.l.
• Supplier product code: a4-7982-04.8×050
• SKU: oscu000001446

Typical applications (nautical and onboard plant engineering)

A countersunk self-tapping screw is commonly used when a clean fastening and a flush head are desired, for example on paneling, finishes, or components where the external bulk must remain contained. In nautical and maintenance contexts, it can be used in many operational situations, depending on the material to be fastened and the support.

Examples of use

• Assembly and fastening of hardware accessories and small parts on surfaces prepared for countersinking.
• Installations on panels or coverings where a flush finish is useful.
• Localized maintenance and replacement of screws on existing components, maintaining the same type (Auto TS) and size.
• Light assemblies and fastening of service elements, when a component in AISI is required as per project or specification.

Note: the choice of the correct screw always depends on the support, the thickness of the materials, and the presence of an adequate countersink seat. If necessary, check the required size by comparing it with the existing screws or the installation drawing.

Usage and installation notes

To achieve a correct fastening and reduce the risk of damage, it is advisable to follow some general guidelines, valid for stainless steel self-tapping screws:

• Support check: check that the material is suitable for a self-tapping screw and that the thickness allows adequate anchoring.
• Seat preparation: depending on the material, it may be useful to prepare a seat consistent with the countersunk head to obtain proper support and a neat finish.
• Controlled screwing: avoid excessive tightening; stainless steel requires care not to damage the drive and head and not to stress the support.
• Tool selection: use a bit/insert in good condition and suitable for the screw drive to reduce the risk of slipping.
• Final check: check the alignment and stability of the fastened component, especially if subject to vibrations or movements.

In case of replacement of an existing screw, always compare size, head type and code (when available) to maintain consistency with the original fastening. If the application involves contact with different materials, also consider the overall compatibility of the assembly and environmental conditions.

FAQ – Frequently Asked Questions

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

The screw is made of AISI 316 stainless steel, as indicated in the product description.

What is the size of this screw?

The indicated size is 4.8×50.

What type of head does this screw have?

This version is described as countersunk, for a more integrated finish with the supporting surface.

What is the Osculati product code for this item?

The supplier code is a4-7982-04.8×050. The internal SKU is oscu000001446.

To which regulatory family is it associated according to the manufacturer?

According to the manufacturer's indication, the item is associated with the UNI 6955 / DIN 7982 family.