Machine screw M3 | assortment box | 720 pieces

A smart solution for those who want the right screw close at hand – the assortment box contains M3 machine screws in several lengths as well as matching nuts and washers, all manufactured in stainless A4 / AISI 316 acid-proof steel. Perfect to keep in the tool cabinet, boat, car, or at the workplace – you avoid searching for loose parts and get a complete set for fastening in demanding environments.

Thanks to the acid-proof steel, the contents can withstand moisture, salt, chemicals, and large temperature fluctuations – ideal for marine, industrial, or outdoor installations. When a certain dimension runs out in the box, you can easily top it up directly from our website.

FIELD OF APPLICATION

For mounting machines, panels, and equipment in environments such as coastal areas, wet rooms, or chemical plants. The metric threads provide a secure fastening together with the included nuts and washers. Easily installed with a screwdriver, hex key, or socket wrench depending on the screw type.

TECHNICAL SPECIFICATIONS

Product type: Assortment box with machine screws
Standard: Various
Grade: A4 / AISI 316
Material class: A4-70
Thread type: Metric
Surface treatment: Untreated (natural stainless steel)
Head shape: Mixed (countersunk, cylindrical, pan head)
Drive type: Hex socket, Hexagonal

FREQUENTLY ASKED QUESTIONS (FAQ)

What does an assortment box with M3 screws contain, and why is the combination with nuts and washers so practical?

The assortment box is a complete solution that contains M3 machine screws in the most requested lengths together with corresponding hex nuts and flat washers of the same thread pitch and material grade. This means you always have a complete and directly compatible connection ready for:

• Electrical and electronic assembly: Attachment of circuit boards, enclosures, and sensors.

• Precision engineering & marine electronics: Mounting of instrumentation, panels, and smaller fittings in humid environments.

• Repair work: Quick and secure replacement of lost or rusty small screws without time-consuming searching.

Why is the M3 dimension extra sensitive to corrosion and why is A4 / AISI 316 required?

M3 screws have a very small cross-sectional area and fine threads. If such a thin screw is exposed to corrosion, its load-bearing material thickness decreases rapidly, which can lead to the screw snapping under the slightest load. Acid-proof A4 steel (AISI 316 / 1.4401) contains molybdenum, which provides maximum resistance to pitting and crevice corrosion from salt water, condensation, capillary moisture, and chemicals. This guarantees that the M3 connection holds up over time.