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ASSY 3.0 SKII timber screw
ASSY 3.0 SKII steel zinc plated partial thread AW
SCR-SKII-WO-AW40-(A3K)-8X320/100
ASSY 3.0 SK
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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%
Tip
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
Surface
- 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.
ETA-11/0190
Datasheets(X)
- Universal use for screwing two wooden components together with high pressure in visible areas
- Carport, structural end grain screw connection
- Roof insulation
- Utilisation classes 1 and 2
Screw-in angle 0° to 90°.
For coniferous wood or wood-based materials made from softwood, the screw connection is made without pre-drilling.
To reduce the edge distances, a pre-drilled hole can be made according to the core diameter.
When screwing into hardwood, pre-drill according to ETA-11/0190.
To increase the consolidation effect or penetration resistance, we recommend using in conjunction with precision washers for ASSY 3.0 SKII.
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Nominal diameter (d) | 8 mm |
Length (l) | 320 mm |
Thread length (lg) | 100 mm |
Head type | Washer head II |
Head diameter (dh) | 18.4 mm |
Head height (k) | 2.3 mm |
Internal drive | AW40 |
Thread type | Wood screw thread |
Thread design | Partial thread |
End milling cutter | Yes |
Thread form | 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 | 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 |
Select RAL-colour code
!! NOTE: On-screen visualisation of the colour differs from real colour shade!!