Wood screw A4 | Assortment box | 540 pieces

If you are looking for an assortment box of wood and chipboard screws that can handle direct installation in demanding environments without rusting, this is a reliable choice. The screws are manufactured from A4 / AISI 316 acid-proof stainless steel, making them resistant to moisture, salt, chemicals, and large temperature fluctuations. They are particularly suitable for environments where corrosion resistance and long-term durability are essential—such as marine, industrial, or outdoor settings.

FIELD OF APPLICATION

The screws are intended for fastening into wood and wood-based materials such as chipboard, MDF, and plywood, in environments such as coastal areas, boats, wet rooms, food production, and the chemical industry. The cutting thread provides effective grip in the material and results in a stable, vibration-proof fastening without the need for plugs or other fittings. The countersunk head allows for a flush finish against the surface, and installation is performed with a Torx bit for maximum power transmission and minimal risk of cam-out. The assortment includes several common dimensions to meet the needs of both new installations and service work.

TECHNICAL SPECIFICATIONS

• Product type: Assortment box of wood and chipboard 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
• Drive type: Torx

FREQUENTLY ASKED QUESTIONS (FAQ)

What is the advantage of a combined assortment box for wood and chipboard screws?

An assortment box gives you direct access to the most frequently used dimensions, perfectly sorted in durable compartments. You avoid buying full large packs of odd sizes and always have the right screw ready in your service vehicle, boat, or workshop for:

• Interior and carpentry work: Fastening of sheet materials, panels, and battens.

• Marine and outdoor installation: Constructions in moisture-exposed environments where timber thickness varies.

• Quick repairs: Immediate access to replacement screws during maintenance work.

Why is acid-proof A4 / AISI 316 necessary in wood and chipboard outdoors?

Wood and wood-based sheet materials absorb and retain moisture for a long time. When this moisture reacts with the wood's natural acids (such as tannic acid in oak or larch) or external salt water, a highly corrosive environment is formed. Acid-proof A4 steel (AISI 316 / 1.4401) contains molybdenum, which provides complete protection against crevice and pitting corrosion. This prevents screw heads from snapping off due to rust and eliminates unsightly rust streaks on the wood surface.

Is pre-drilling required when driving A4 chipboard screws into wood-based panels?

In softer wood species as well as in standardized chipboard and MDF panels, the screw is usually driven in directly thanks to its sharp point and cutting thread. However, when installing in hardwoods, near edges, or in compact laminate, pre-drilling and countersinking are always recommended. Since stainless A4 steel is slightly softer than hardened carbon steel, pre-drilling reduces torsional resistance and prevents the screw from seizing or becoming overloaded during tightening.