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ASSY® 3.0 SK A2 Timber screw
ASSY 3.0 SK stainless steel A2 full thread AW
SCR-SK-WO-A2-AW40-8X50/42
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Stainless steel A2, full thread, large washer head, AW drive, ring thread
- Connects the wood instead of splitting it
Large washer head with AW drive
- Better transmission of forces.
- Optimum centring.
- Long service life.
- Even distribution of force prevents the surface coating from being damaged.
AW drive — more power
- Optimal force transmission
- Excellent fit
- Rapid finding
- Screw settles securely
- Virtually no unscrewing of bit
- No wobbling
Thread:
- Full thread for high load-bearing capacity.
- Easy to screw in thanks to asymmetrical single-start thread
Ring thread — less tendency of the wood to split, very few blow-outs
- Very precise positioning thanks to the 30° tip.
- Punch effect of ring thread largely prevents blow-outs
- Low splitting forces, in particular when screwing close to edges
- Low screw-in torque and high over-turning force
- Reduction of screw-in torque
- Faster screwing than conventional particle board screws
Tip
- Very precise positioning thanks to the 30° tip.
- Screw with ring thread in the tip area, which greatly reduces the splitting forces of the wood, especially in the edge area.
Material:
Austenitic stainless steel A2 (1.4301, 1.4567)
Use Würth timber construction software to measure the ASSY screws with a diameter of more than 5 mm.
Austenitic stainless steel is characterised by a high degree of corrosion resistance against aggressive industrial air, sea air, tap water, river water, mine water and salt water, as well as woods containing tannic acid. It is resistant to acid to a certain extent and not suitable for atmospheres containing chlorine gas.
The range of applications of the various stainless steels is detailed in the following ISER (German Information Office for Rustproof Stainless Steel, Non-Rusting Steels for Various Environmental Conditions, www.edelstahl-rostfrei.de, Information Sheet 828) table. 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 only using austenitic stainless steels for outdoor applications, taking the environmental conditions into account.
When using these screws, please follow ETA-11/0190 specifications.
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 tip, mating thread, ring thread, serrated edge, self-clearing groove, etc.) in plastic dowels, e.g. Würth ASSY D, prefix number 0151 (countersunk head) and prefix number 0153 (pan head).
Datasheets(X)
- Screwing to posts, fastening sheet-metal parts
- Outdoor areas, humid rooms and rooms with atmospheres containing salt (utilisation class 3)
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, drill according to ETA-11/0190
 | |
Nominal diameter (d) | 8 mm |
Length (l) | 50 mm |
Thread length (lg) | 42 mm |
Head type | Round washer head |
Head diameter (dh) | 18.9 mm |
Head height (k) | 4 mm |
Internal drive | AW40 |
Thread type | Wood screw thread |
Thread design | Full thread |
Thread form | Single start thread |
Core diameter | 5 mm |
Shape of tip | Tip with counter thread |
Angle of the tip | 30 Degree |
Material | Stainless steel A2 |
Surface | Plain |
Max. screw-in angle | 90 Degree |
Min. screw-in angle | 0 Degree |
Suitable for use in the following materials | Board ply wood (BSP), Wood, Derived timber product, Hardwood, LVL, Softwood |
Area of application | Outdoors, Balcony construction, Bridge construction, Wet areas, Timber construction, Structural woodwork, Post screws, Solar collector |
Approval | ETA-11/0190 |
RoHS-compliant | Yes |