ASSY® 3.0 A2 Chipboard screw
ASSY<SUP>®</SUP> 3.0 A2 Chipboard screw - 1
ASSY<SUP>®</SUP> 3.0 A2 Chipboard screw - 2
ASSY<SUP>®</SUP> 3.0 A2 Chipboard screw - 3
ASSY<SUP>®</SUP> 3.0 A2 Chipboard screw - 4

For detailed information, other images and documents, please select individual articles from the following table.

ASSY® 3.0 A2 Chipboard screw

Universal for fixing fences, balconies, walkways, play equipment in permanently exposed outdoor environments.

  • Head type: Countersunk head
  • Thread type: Wood screw thread
  • Thread design: Partial thread
  • Thread format: Single thread
  • Shape of tip: Tip with ring thread
  • Angle of the tip: 30 Degree
  • Material: Stainless steel A2
  • Surface: Plain
  • Min./max. screw-in angle: 0-90 Degree
  • Suitable for use in the following materials: Board ply wood (BSP), Wood, Derived timber product, Hardwood, LVL, Softwood
  • Area of application: Façades, Terrace, Fence, Structural woodwork, Wet areas, Balcony, Board walk, Play equipment, Outdoors
  • Approval: ETA-11/0190
  • Screw requiring approval: Yes
  • RoHS-compliant: Yes

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Available in 18 versions

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You can refine your search by selecting different attributes

Art.-no. Nominal diameter Length Head diameter Head height Quantity PU
5 mm 70 mm 9.6 mm 3 mm
200 pcs
3.5 mm 40 mm 7 mm 2.5 mm
500 pcs
5 mm 50 mm 9.6 mm 3 mm
250 pcs
6 mm 120 mm 12 mm 4.1 mm
100 pcs
6 mm 100 mm 12 mm 4.1 mm
100 pcs
6 mm 140 mm 12 mm 4.1 mm
100 pcs
6 mm 110 mm 12 mm 4.1 mm
100 pcs
5 mm 80 mm 9.6 mm 3.2 mm
100 pcs
6 mm 200 mm 12 mm 4.1 mm
100 pcs
4 mm 70 mm 8 mm 2.5 mm
200 pcs
4.5 mm 80 mm 8.9 mm 2.7 mm
100 pcs
6 mm 80 mm 12 mm 4.1 mm
100 pcs
4.5 mm 70 mm 8.9 mm 2.7 mm
200 pcs
6 mm 70 mm 12 mm 4.1 mm
200 pcs
4 mm 40 mm 8 mm 2.5 mm
500 pcs
4 mm 60 mm 8 mm 2.5 mm
250 pcs
6 mm 90 mm 12 mm 4.1 mm
100 pcs
6 mm 60 mm 12 mm 4.1 mm
200 pcs

Packaging unit

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Just leave the field empty if you don't know the packaging unit when directly entering the article number in the shopping basket or when importing with Easy-/VarioScan. The packaging unit will be determined automatically.

Structure of our article number

The article number is made up of the following: VVVVAAABBB
VVVV = 4 digits for prefix number (please note that the first digit is currently always 0)
AAA = 3 digits for dimension part 1
BBB = 3 digits for dimension part 2

Example article number structures:
Example 1: Screw with dimensions of 4x10 mm:
00574 10 (2 spaces between the 4 and the 10)

Example 2: Screw with dimensions of 10x20 mm:
005710 20 (1 space between the 10 and the 20)

Example 3: Flat washer with an internal diameter of 6 mm:

Information on price and image display

Price per packaging unit (PU):
The displayed price is always in line with the displayed packaging, if the PU is 250 the price for 250 units, if the PU is 300 the price for 300 units.

Price with price key representation (PSL):
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Price for 1 unit
Price for 100 units
Price for 1000 units


The quantity shows the number of pieces or units of measure contained in the order or delivery for the respective article.
Art.-no. Cust. Mat. No.

Hazardous Material

Product information

Würth Catalogue

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Technical information

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A2 stainless steel, partial thread, countersunk head, AW drive

Joins wood instead of splitting it

Asymmetrical single-start thread — greater speed, greater traction

  • Low screw-in torque

  • High over-turning force

  • Faster screwing than conventional particle board screws

AW drive – more power

  • Optimal force transmission

  • Excellent fit

  • Rapid finding

  • Screw settles securely

  • Virtually no unscrewing of bit

  • No wobbling

  • No damage to surface coating of screw

  • Only 5 bit sizes for diameters 3.0 to 12.0 mm

Ring thread — less tendency of the wood to split, very few blow-outs

  • Low splitting forces, in particular when screwing close to edges

  • Reduction of screw-in torque

  • Punch effect of ring thread largely prevents blow-outs


Corrosion-resistant, austenitic stainless steel (1.4301; 1.4567)


Pre-drilling to core diameter on solid hard woods

ASSY® 3.0 A2 have limited resistance to acid and are unsuitable for chloride gas-containing atmospheres.

To attach metals to wood, machine a precise cutout in the metal tab.

ASSY 3.0 chipboard screws are optimised for use in wooden materials. If used in plastic anchors, this may cause a reduction in the load-bearing capacity. Therefore, we recommend only using screws without optimised thread tips (drill tip, mating thread, ring thread, serrated edge, self-clearing groove etc.) in plastic anchors, e.g. ASSY D, prefix number 0151 (countersunk head) and prefix 0153 (pan head).

The range of applications of the various stainless steels is detailed in the following table issued by the ISER (German Information Office for Rustproof Stainless Steel, Non-Rusting Steels for Various Environmental Conditions,, Information Sheet 828). Rustproof stainless steels (e.g. material no. 1.4016) are recommended in terms of atmospheric conditions only for use in a rural environment, and in this respect only subject to significant restrictions. We therefore recommend using only austenitic stainless steels for outdoor applications, taking the environmental conditions into account. Stainless steel A4 is especially suitable for use in an industrial atmosphere and for use near the sea.

Available work documents:

Timber dimensioning software, load tables and detailed processing instructions can be found on the service page


When using these screws, please follow ETA-11/0190 specifications.