Auto ts 3.9×19 aisi 316 countersunk – code: a4-7982-03.9×019 – Osculati

Osculati Auto TS self-tapping screw in AISI 316 – 3.9×19

The Auto TS Osculati is a self-tapping screw made of AISI 316 stainless steel, designed for hardware, maintenance and installations in the nautical field and onboard systems. The product is identified by the supplier code a4-7982-03.9×019 (SKU oscu0000001448) and is associated by the manufacturer with the family references UNI 6955 / DIN 7982.

This version is in size 3,9×19 and features cross recess. It is a practical solution when a quick fastening on compatible supports is desired, maintaining the choice of stainless steel for contexts where the hardware is exposed to challenging environments typical of nautical use.

Product features and details

Material: stainless steel AISI 316

The screw is made of AISI 316, a common choice in the nautical field for fastening components and small parts. The use of stainless steel is often preferred when looking for components suitable for onboard installations and contexts where hardware may be subject to humidity and external agents.

Type: Auto TS self-tapping screw

The series Auto TS identifies a screw self-tapping, indicated for applications where direct fastening on compatible materials is desired, with an orderly and repeatable installation. When choosing, it is important to verify that the support and thickness are adequate for the screw size and the type of installation planned.

Size and identification

• Size: 3,9×19
• Supplier product code: a4-7982-03.9×019
• SKU: oscu0000001448
• Family references: UNI 6955 / DIN 7982
• Supplier: Osculati S.r.l.

Head and recess

The product is described with cross recess, useful for tightening with common tools and for maintenance interventions where practicality is required. Regarding the head geometry, adhere to the denomination and the images/variants available on the sheet: in case of doubt, it is advisable to verify the correspondence with the application (for example, the need for support or countersinking) before ordering.

Typical applications (nautical and onboard plant engineering)

This stainless steel self-tapping screw is suitable for many hardware workings and technical installations, especially when working on onboard components and accessories that require reliable and easily inspectable fastenings. Some examples of use, to be evaluated according to the support and project:

• Assemblies and fastenings of accessories and small parts on compatible structures and paneling.
• Routine maintenance and replacement of existing screws in nautical systems and fittings.
• Installations in areas where the use of stainless steel components is preferred.
• Restoration interventions on fastenings that require a self-tapping screw with a cross recess.

As with any fastening element, correct application depends on the material, thickness, support conditions, and accessibility of the work area. If the installation is subject to vibrations or stresses, it is advisable to evaluate the best mounting practices and the possible use of complementary solutions (without altering the component specifications).

Usage and assembly notes

Pre-drilling and support preparation

For correct assembly, attention is recommended to pilot hole, alignment, and cleanliness of the work area. Pre-drilling (when necessary) helps guide the screw and reduce the risk of misalignment, especially on rigid supports or where thicknesses require greater control during screwing.

Alignment and tightening

During installation, keep the screw in line aligned with the hole and proceed with progressive tightening. Use a suitable tool for the cross recess, in good condition, to reduce the risk of slipping and to achieve a cleaner tightening. Avoid excessive force: controlled tightening helps preserve both the screw and the support.

Checks before ordering

• Confirm the size 3.9×19 depending on the application or the screw to be replaced.
• Check the material required (AISI 316) based on the usage environment and existing hardware.
• Check the variant (head/recess) according to the support and finishing needs of the assembly.
• Reference code: for reorders and matches, use a4-7982-03.9×019.

For specific applications or if uncertain about the correct variant, it is advisable to compare the supplier code and the characteristics required by your intervention to avoid incompatibilities during installation.

FAQ – Frequently Asked Questions

What is the material of the Auto TS Osculati screw?

The screw is made of AISI 316 stainless steel, indicated for technical applications and often chosen in the nautical field.

What is the size of this self-tapping screw?

The size indicated on the sheet is 3.9×19. It is advisable to verify the correspondence with the screw to be replaced or with the installation project.

What is the supplier code for reorder?

The supplier product code is a4-7982-03.9×019. For internal reference, the SKU oscu0000001448 is also available.

What type of drive does the screw have?

The screw is indicated with a cross recess, useful for tightening with common tools and for maintenance interventions.

To which family regulatory references is it associated?

The manufacturer associates the item with the family references UNI 6955 / DIN 7982. In case of replacement, always check the size, material, and head variant as well.