Auto tc 3.9×32 aisi 316 domed – code: a4-7981-03.9×032 – Osculati

Osculati Auto TC self-tapping screw in AISI 316 (domed head)

The Auto TC Osculati is a self-tapping screw in AISI 316 stainless steel, designed for technical fastenings where reliability, assembly order, and a clean finish are required. This version is identified as Auto TC 3.9×32 with rounded head and represents a typical choice for work and interventions in nautical and onboard plant environments, as well as for general hardware applications where a stainless steel component is needed.

The product is provided by Osculati S.r.l. and is recognizable by supplier code a4-7981-03.9×032, useful for reorders, spare parts management, and alignment with bill of materials.

Features and construction details

Material: stainless steel AISI 316

The screw is made of AISI 316, a stainless steel alloy commonly chosen in technical and nautical contexts for its suitability for use in demanding environments. It is a consistent solution when uniformity of materials on stainless steel components and accessories is desired, reducing the risk of suboptimal combinations during maintenance or refitting.

Type: self-tapping screw (Auto TC)

It is a self-tapping screw, indicated when you want to create a fastening without relying on pre-existing threads. In many fitting and maintenance operations, this type allows practical and orderly assembly, especially on hardware elements and accessories where speed of installation and repeatability of fastening are important.

Domed head and cross recess

The proposed version has a rounded head and cross recess. The domed head is often chosen when a regular external finish and a neat appearance are desired, maintaining a visible but clean profile. The cross recess is a common solution for screwing with common tools, useful in workshops and onboard.

Regulatory references indicated by the manufacturer

As per the manufacturer's indications, the references are reported UNI 6954 / DIN 7981. These references help to contextualize the type of screw and facilitate replacement with equivalent components when working on existing systems or fittings.

Product identification

• Supplier product code: a4-7981-03.9×032
• SKU: oscu000001443
• Manufacturer/Supplier: Osculati S.r.l.

This data is particularly useful for those managing technical purchases, spare parts warehouse, or scheduled maintenance, where correct component identification avoids errors and time loss.

Typical applications (nautical and onboard plant engineering)

The self-tapping screw in AISI 316 stainless steel is used in numerous contexts of hardware and equipment, especially when working on accessories and components exposed to humid environments or harsh conditions typical of nautical use. In particular, it is a frequent choice for:

• Nautical fittings: fastening accessories, finishes, and small parts on structures and paneling.
• Onboard maintenance: replacement of existing screws with stainless steel components, maintaining material consistency.
• Plant engineering and hardware: assemblies on technical elements where a self-tapping screw with a cross recess is useful.
• Restoration interventions: when a replacement part identifiable and easily reorderable by code is needed.

In general, it is suitable for operations where a practical fastening and a neat finish are desired, without introducing elements inconsistent with the usage environment.

Usage and notes for selection

Support and pilot hole verification

Being a self-tapping screw, , the fastening performance depends on the support and the correct preparation of the installation point. In technical contexts, it is good practice to check the material to be fastened and, if provided by the assembly procedure, prepare an adequate pilot hole to achieve regular screwing and reduce the risk of damage to the support.

Material consistency and maintenance

In nautical and plant applications, maintaining consistency between materials (for example, hardware and stainless steel screws) is often a sensible choice to simplify maintenance and reduce issues over time. If you are replacing an existing screw, always compare the head shape, recess, and type (self-tapping) to ensure a correct replacement.

Quick identification for reorder

For reorders and spare parts management, refer to code a4-7981-03.9×032 and the SKU oscu000001443. This helps avoid ambiguities, especially when similar screws by material, head, or recess are present in the warehouse.

Note

The information provided follows the indications available for this item (AISI 316 material, pan head, cross recess, and UNI/DIN references). For specific project needs or particular supports, it is advisable to verify the correct choice of screws based on the application.

FAQ – Frequently Asked Questions

Is this screw made of AISI 316 stainless steel?

Yes, the item is indicated as Osculati Auto TC self-tapping screw in AISI 316 stainless steel.

What kind of head does this TC Car have?

This version has a domed head, suitable when a neat external finish with a visible head is desired.

What footprint does the vine have?

It is indicated with a cross-shaped imprint, a common solution for screwing with widely used tools.

Are there regulatory references?

Yes, as per the manufacturer's instructions, the references UNI 6954 / DIN 7981 are reported.

What is the code to reorder the product?

For reordering you can use the supplier code a4-7981-03.9×032; the internal SKU is oscu000001443.