Wood screw | fully threaded | A4 | WS 9130

Do you need a wood screw that performs safely even in damp, salty, and chemically demanding environments? Full-thread wood/chipboard screw with countersunk head in acid-proof stainless steel A4 (AISI 316) is built to resist corrosion and maintain its strength over a long period. It combines easy installation with high tensile strength and is optimized for wood and chipboard fastenings where a neat, flush finish is important. The TX drive provides the best possible grip and reduces the risk of wear on both the screw and the bit.

APPLICATION

Perfect for mounting in wood and chipboard, for example in coastal areas, docks, marine equipment, facades, or other construction where maximum corrosion resistance is required. The fully threaded design provides a stable connection along the entire length of the screw, and the countersunk head results in a smooth and clean surface without the need for post-processing. Easy to install with Torx bits (TX10–TX25 depending on dimension) and requires minimal maintenance even in exposed environments.

TECHNICAL SPECIFICATIONS

• Product type: Chipboard screw, fully threaded

• Standard: Not specified

• Quality: A4 / EN 1.4401 / AISI 316 (acid-proof stainless steel)

• Material class: Not specified (A4 stainless steel)

• Thread type: Self-tapping wood thread

• Surface treatment: Untreated (natural-colored stainless steel)

• Head shape: Countersunk head

• Drive type: Torx drive (TX10–TX25 depending on dimension)

FREQUENTLY ASKED QUESTIONS (FAQ)

What is the advantage of a fully threaded wood screw compared to a partially threaded one?

A fully threaded wood screw has threads along the entire shank, which provides maximum pull-out resistance along the entire length of the screw. This makes fully threaded screws ideal for fastening in thinner sheet materials (such as chipboard, plywood, and MDF), fittings, angle brackets, or when you want to anchor two materials without the underside of the screw head having to take the entire tensile load.

Why is a countersunk head with TX drive (Torx) optimized for sheet materials and wood?

The countersunk head is drawn down evenly into the wood or sheet material and leaves a smooth, flat surface without protruding edges. The TX drive provides precise, centered power transmission from the screwdriver and eliminates the risk of the bit slipping (cam-out), which protects both the screw, the tool, and the workpiece from damage during installation.

Why is acid-proof A4 / AISI 316 necessary for wood and board fastenings outdoors?

Wood and board materials in outdoor environments, as well as pressure-treated timber, place high demands on corrosion resistance. Acid-proof A4 steel (AISI 316 / 1.4401) contains molybdenum, which makes the screw highly resistant to corrosion from road salt, seawater, and aggressive tannic acids found in oak, larch, and pressure-treated wood. It prevents weak fastenings and unsightly dark rust stains on the wood surface.