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ASSY 3.0 SKII Timber screw
ASSY 3.0 SKII Timber screw - 1
ASSY 3.0 SKII Timber screw - 2

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

ASSY 3.0 SKII Timber screw

The ASSY 3.0 SKII with a smaller, flat, graduated washer head is designed for universal use in the timber construction/carpentry sector. For applications that require countersinking and effective consolidation.

  • Nominal diameter: 8 mm
  • Head type: Washer head II
  • Head diameter: 18.4 mm
  • Head height: 2.3 mm
  • Internal drive: AW40
  • Thread type: Wood screw thread
  • Thread design: Partial thread
  • End milling cutter: Yes
  • Thread format: Coarse thread
  • Core diameter: 5.3 mm
  • Shape of tip: Tip with counter thread
  • Angle of the tip: 34 Degree
  • Material: Hardened steel
  • Surface: Zinc plated
  • Colour: Silver
  • Max. screw-in angle: 90 Degree
  • Min. screw-in angle: 0 Degree
  • Suitable for use in the following materials: Wood, Derived timber product, Softwood, Board ply wood (BSP), Hardwood, LVL
  • Area of application: Structural woodwork, On rafter insulation, Element construction, Timber construction, Timber panel construction, Roof
  • Additional accessory: Washer for ASSY 3.0 SKII
  • Approval: ETA-11/0190
  • RoHS-compliant: Yes

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You can refine your search by selecting different attributes

Art.-no. Length Thread length (lg) Nominal diameter Head type Quantity PU
100 mm 60 mm 8 mm Washer head II
50 pcs
120 mm 80 mm 8 mm Washer head II
50 pcs
140 mm 80 mm 8 mm Washer head II
50 pcs
160 mm 80 mm 8 mm Washer head II
50 pcs
180 mm 80 mm 8 mm Washer head II
50 pcs
200 mm 80 mm 8 mm Washer head II
50 pcs
320 mm 100 mm 8 mm Washer head II
50 pcs

Packaging unit

The packaging unit defines the number of articles in one packaging. In the catalog segment you can choose from different packaging units if a pop-up menu is displayed.

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 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):
The price always applies to a quantity ruled through the price key:
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.
In contrast to sales packaging and secondary packaging, the disposal costs for chemical-technical products are shown separately. The breakdown of the individual costs can be found on the relevant products and also in the shopping cart, as well as in our General Terms and Conditions (GTC).
Art.-no. Cust. Mat. No.

Hazardous Material

Product information

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Technical information

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Hardened steel, blue passivated (A3K), graduated washer head, AW drive, end mill, partial thread, counter thread

Connects the wood instead of splitting it

Graduated washer head

  • Combines the properties of a countersunk head with those of a washer head. Transmits high forces but can be countersunk

  • Screw head is flush with the surface of the wood

  • Minimises the number of screw variants so that less stock is required

AW drive – more power

  • Optimum power transmission, excellent fit, fast location

  • No wobbling, no damage to surface coating of screw

  • Ideal for overhead work

End mill – the "auxiliary motor" for lower force

  • Reduction of the screw-in and head countersinking torque by approx. 20%, especially with long screws

  • Gentle on your tools and extends the battery life

Asymmetric coarse thread – faster speed

  • Low screw-in torque, high over-turning force

  • Faster screwing than conventional chipboard screws — reduces working time by 30%


Very precise positioning thanks to the 34° tip

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

  • Minimal splitting forces, especially when screwing in at edges

  • Reduction of the screw-in torque


  • Blue passivated, A3K, Cr III, min. 8 µm

Do not use the screw in applications exposed directly to the elements, in humid rooms or in atmospheres containing chlorine gas.

For applications outdoors and in rooms which are briefly or constantly subjected to high humidity, please use the stainless steel ASSY 3.0 SK A2 screw, prefix number 0181.

Hardwood must be pre-drilled in accordance with ETA-11/0190.

Use Würth timber construction software to measure the ASSY screws with a diameter of more than 5 mm.

ASSY 3.0 particle board screws are optimised for use in wooden materials.

When used in plastic anchors, a reduction of the load-bearing capacity is possible. Therefore, we recommend only using screws without optimised thread tips (drill bit, mating thread, ring thread, serrated edge, self-clearing groove, etc.) in plastic dowels, e.g. Würth ASSY D, prefix 0151 (countersunk head) and prefix 0153 (pan head).

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