Sheet metal/wood screw | assortment box | 430 pieces

If you are looking for an assortment box with fastening screws that can handle direct mounting in demanding environments without rusting, this is a reliable choice. The screws are manufactured from A4 / AISI 316 acid-proof stainless steel, which withstands moisture, salt, chemicals, and temperature fluctuations. They are used where durability and corrosion resistance are critical – particularly in marine, industrial, or outdoor environments.

FIELD OF APPLICATION

The screw is intended for fastening into timber constructions and sheet metal in environments such as coastal areas, boats, wet rooms, food production, and the chemical industry. The cutting thread of the screws ensures a vibration-proof and secure fastening without the need for additional fittings or plugs. Installation is performed using Phillips (PH) and Pozidriv (PZ) tools, in pre-drilled or self-drilling applications. The assortment covers several common dimensions, making it ideal for professional installers, service technicians, and maintenance personnel working in environments where stainless steel fastening is a requirement.

TECHNICAL SPECIFICATIONS

• Product type: Assortment box with wood and sheet metal screws
• Standard: Not specified
• Quality: A4 / AISI 316
• Material class: A4-70
• Thread type: Cutting thread
• Surface treatment: Untreated (natural stainless steel)
• Head shape: Countersunk and pan head (mixed)
• Drive type: Phillips (PH) and Pozidriv (PZ)

FREQUENTLY ASKED QUESTIONS (FAQ)

What is the advantage of an assortment box with acid-proof fastening screws?

An assortment box gives you immediate access to the right screw length and diameter for the task at hand, organized in well-arranged compartments. This means you do not have to interrupt your work to look for individual dimensions or buy entire bulk packs of screws you rarely use. The box is perfect to keep ready in a service vehicle, workshop, or on a boat for quick installation situations.

Why are fastening screws in acid-proof A4 / AISI 316 superior in outdoor and marine environments?

Fasteners used in load-bearing structures, fittings, or exterior panels are constantly exposed to moisture, salt spray, urban pollution, and chemicals. Acid-proof A4 steel (AISI 316 / 1.4401) is alloyed with molybdenum, which provides complete protection against crevice and pitting corrosion. The screw does not rust, does not stain the substrate with rust runoff, and retains its mechanical load-bearing capacity throughout its entire service life.

What should be considered when fastening with A4 screws in metal or concrete/brick?

Since stainless and acid-proof steel is somewhat softer and has lower torsional strength than hardened carbon steel, the correct preparations are required:

• In metal: Use the correct drill diameter for threading/through-holes and preferably apply lubricant or assembly paste to prevent galling.

• In concrete/brick/masonry: Always combine the screw with a quality-assured nylon plug adapted for the screw's diameter and drill a clean hole free from drilling dust.