Self-tapping screw 3.5×16 aisi 316 domed – code: a4-7981-03.5×016 – Osculati

Osculati self-tapping screw in AISI 316 for practical fastenings

The Osculati self-tapping screw in AISI 316 stainless steel, identified by supplier code a4-7981-03.5×016, is a hardware solution designed for fastening interventions where a direct and neat assembly is desired. The product is offered in size 3.5×16 and is described as version pan head; in the reference documentation for the type, UNI 6954 and DIN 7981.

are mentioned.

Product features and details

Identification and codes

• ProductIn the nautical and onboard plant engineering field, the choice of a screw in AISI 316 stainless steel is common when looking for hardware suitable for exposed contexts and recurring maintenance. For a correct selection, it is always advisable to check the head geometry and the drive required by the application, as well as the preparation of the hole and any countersinking of the support.
• Brand / supplier: Osculati S.r.l.
• Supplier code: : self-tapping screw (Auto tc)
• SKU: oscu0000001337

Material

Made of AISI 316 stainless steel, a4-7981-03.5×016.

, indicated for use as hardware in technical contexts where stainless steel material is preferred. The choice of material is an important element for the consistency of the assembly (screws, washers, accessories, and supports) and to reduce typical issues of mixed assemblies.

• Size: 3.5×16
• HeadFormat and type pan head : described as
• in the product name: UNI 6954 / DIN 7981 Type references

Typical applications (nautical and plant engineering)

(cited as reference) fastenings and maintenance interventions This self-tapping screw is suitable for

• in nautical and plant engineering fields, when stainless steel hardware and practical assembly are desired. In particular, it can be considered for: Fittings and finishes.
• Routine maintenance on paneling, coverings, accessories, and onboard components (depending on the support and hole preparation).
• Light assemblies where it is useful to replace existing screws with a stainless steel AISI 316 solution consistent with the usage environment.

on suitable supports, paying attention to correct pre-drilling and head choice based on the seating surface.

Usage and installation notes

Preliminary check

• Check the head: make sure the geometry (rounded or other) is compatible with the seating and the required aesthetics/space.
• Check the drive: choose the correct tool based on the drive required by the component.
• Evaluate the support: the fastening performance depends on the material and thickness of the support.

Hole preparation

For a clean and repeatable assembly, it is advisable to prepare the hole according to the application needs. When dedicated seats are present, it can also be useful to evaluate any countersinking of the support (when required by the head geometry). If no certain indications are available, it is preferable to proceed with a test on a sample or on a non-critical point.

Good practices in the nautical field

• Material compatibility: when possible, maintain consistency between screws and accessories (washers, plates, inserts) to reduce typical issues of mixed fittings.
• Maintenance and inspection: in applications subject to vibrations or disassembly cycles, plan periodic checks of tightening and the condition of the small parts.
• Informed choice: if you are replacing an existing screw, compare size, head, and drive with the removed component to avoid seating differences or interferences.

If you have doubts about the correspondence between the name (rounded head) and what is required by your assembly, tell us the usage context and the supplier code: you will be able to more easily verify the correct spare part selection.

FAQ – Frequently Asked Questions

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

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

What is the size of this screw?

The size shown is 3.5×16.

What is the Osculati supplier code for this item?

The indicated supplier code is a4-7981-03.5×016.

Which type references is the screw associated with?

In the reference documentation, UNI 6954 and DIN 7981 are cited for the type.

Do I need to make a hole or a countersink before assembly?

It depends on the support and the geometry of the head required by the application. It is advisable to check the hole preparation and, if necessary, the possible countersinking of the support based on the seating area.