Auto tc 5.5×32 aisi 316 countersunk – code: a4-7981-05.5×032 – Osculati

Osculati self-tapping screw Auto TC 5.5×32 in AISI 316 with countersunk head

The Auto TC 5.5×32 AISI 316 countersunk Osculati is a self-tapping screw designed for fastenings where practical assembly and a neat finish are needed. The countersunk head helps achieve a more integrated result on the surface, while the’cross recess facilitates screwing with common workshop and maintenance tools.

This item is offered with type classification DIN 7981 / UNI 6954 (as per Osculati indication) and is made of AISI 316 stainless steel, a material frequently chosen in nautical and plant engineering fields for fastening components. It is a suitable solution both for new installations and replacements, when consistency of format and finish is desired.

Features and construction details

• Type: screw self-tapping (Auto TC).
• Material: AISI 316 stainless steel.
• Head: countersunk, for a more integrated seating in the seat.
• Drive: cross, for practical tightening with screwdriver or compatible bit.
• Type references: DIN 7981 / UNI 6954 (Osculati classification).
• Size: 5,5×32.
• Supplier product code: a4-7981-05.5×032.
• SKU: oscu0000001453.
• Supplier: Osculati S.r.l.

The combination of self-tapping and countersunk head makes this component suitable when you want to simplify installation and achieve a cleaner appearance, especially on panels, accessories, and onboard small parts. To maintain correct assembly, it is good practice to verify that the countersink seat and the support are suitable for the intended fastening type.

Typical applications (nautical and plant engineering)

In a technical context such as onboard maintenance or plant engineering, a self-tapping screw in AISI 316 is often chosen for quick interventions and targeted replacements. This countersunk head version is particularly useful when you want to reduce protrusions and achieve a more integrated finish.

Where it can be used

• Nautical fittings and accessories: fastening of components and small parts on surfaces prepared for countersinking.
• Maintenance and replacements: restoration of existing fastenings with a consistent type (DIN 7981 / UNI 6954 as classification reference).
• Onboard systems: installations where a practical and neat fastening with a countersunk head is useful.
• General hardware: applications where self-tapping is preferred to speed up assembly on compatible supports.

The choice of the correct screw always depends on the material and thickness of the support, as well as the type of component to be fastened. If you are not sure about compatibility with the seat or the material, it is advisable to perform a test on a sample or check the configuration of the existing fastening.

Usage and installation notes

Below are some general guidelines (not replacing internal procedures or the specifications of the component to be installed) to best manage a self-tapping screw with a countersunk head:

• Seat check: make sure the surface is prepared for countersunk head and that the screw can rest properly.
• Tool selection: use a cross screwdriver/bit in good condition to reduce the risk of damaging the slot.
• Screwing in axis: maintain alignment during insertion to promote regular threading and a neat finish.
• Controlled tightening: tighten just enough to stabilize the component, avoiding unnecessary forcing.
• Consistency in replacement: in case of replacement, check that size and type are equivalent to those of the original fastening.

For quick identification and reorder, refer to the supplier product code a4-7981-05.5×032 and the SKU oscu0000001453. This helps maintain supply continuity and reduce errors during procurement.

FAQ – Frequently Asked Questions

What type of screw is the Osculati Auto TC 5.5×32?

It is a self-tapping screw (Auto TC) with a countersunk head and cross recess, suitable for practical fastenings and replacements in the technical field.

What material is it made of?

It is made of AISI 316 stainless steel, a material commonly chosen for nautical and system applications.

Is the head countersunk or cylindrical?

This model has a countersunk head, designed for a more integrated finish when the seat is prepared for countersinking.

What are the indicated type references?

The classification reported is DIN 7981 / UNI 6954, as per Osculati indication.

What is the product code for reordering?

The supplier product code is a4-7981-05.5×032. The internal SKU is oscu0000001453.