ASSY® Isotop Wood construction screw
ASSY Isotop steel zinc plated yellow cyl. head AW
SCR-CYLHD-ISOTOP-WO-AW40-(A2L)-8X300/59
ASSY ISOTOP
Register now and access more than 125,000 products
Steel, yellow galvanised, double thread, cylinder head, AW drive
Head:
Small cylinder head — ideal for sinking into wood
Thread:
A coarse, single-flight asymmetrical thread reduces the screw-in time by 30%
Plastic non-friction coating:
Enables easy screw-in due to sharp threads with glide-promoting coating
AW drive:
- Optimum centring
- Largest possible contact surface of the bits in the screw drive, thus no ejection forces
Combination/replacement products:
- ASSY 3.0 SK
- ASSY plus VG
ASSY Isotop is screwed into the rafters, for example, through the counter lathing and insulation without pre-drilling. With very dry wood (e.g. old building renovation) we recommend pre-drilling the counter lathing 8 mm.
You can use the Würth timber dimensioning software for an individualised static recommendation. Use this formula to easily calculate the screw length (specified in mm).
Additional product documentation:
- Würth timber dimensioning software, (available online or as a download for offline work)
- Timber dimensioning software, load tables and detailed processing instructions can be found on the service page www.wuerth.de/assy.
- Data sheets for over-rafter insulation
ETA–11/0190
When using these screws, please follow ETA-11/0190 specifications.
Attachment of the insulation layer for rafter-insulated gable roofs and curtain-wall façades to insulation layers.
Roof application 1
- With soft insulation < 0.06 N/mm2
For soft insulation with a pressure resistance below 0.06 N/mm2, such as fibreglass, mineral wool, animal and plant eco-insulation = use an alternating screw-in pattern at an angle of 60° to the rafter axis.
Roof application 2
- With pressure-resistant insulation > 0.06 N/mm2
For non-slip insulation with a pressure resistance above 0.06 N/mm2, such as hard polyurethane (PUR) or polystyrene (PDS) foam = parallel screw-in pattern at an angle of 60° to the rafter axis.
Calculation of the required screw length:
- Thickness of securing battens in mm
- + thickness of insulation in mm
- + thickness of boarding in mm
- + 60 mm screw-in depth
Intermediate result in mm x a factor of 1.15
- Final result in mm
- Use the next longest screw length
 | |
Nominal diameter (d) | 8 mm |
Nominal diameter 2 | 10 mm |
Thread length (lg) | 59 mm |
Head thread length | 70 mm |
Length (l) | 300 mm |
Head type | Socket head |
Head diameter (dh) | 11.1 mm |
Head height (k) | 9 mm |
Internal drive | AW40 |
Thread type | Wood screw thread |
Thread design | Double thread |
Thread form | Coarse thread |
Core diameter | 5.3 mm |
Core diameter of head thread | 6.3 mm |
Shape of tip | Tip |
Material | Unhardened steel |
Surface | Zinc plated yellow |
Min./max. screw-in angle | 0-90 Degree |
Product weight (per item) | 85.760 g |
Suitable for use in the following materials | Board ply wood (BSP), Wood, Derived timber product, Hardwood, LVL, Softwood |
Area of application | On rafter insulation, Façade insulation |
Additional accessory | Screw template for ASSY ® ISOTOP chipboard screw |
Additional articles | Dimensioning software, art. no. 0990903002; data sheets for over-rafter insulation; AW bits art. no. 0614... |
Screw requiring approval | Yes |
Approval | ETA-11/0190 |
Datasheets (1)
CAD data (available after login)
Certificates/ Documents (0)
Select RAL-colour code
!! NOTE: On-screen visualisation of the colour differs from real colour shade!!
Last viewed
Hexagon Socket Head Cap Screw ISO 4762/DIN 912, steel 10.9, plain
Chin strap, 4-point for SH 2000 and SH 3000 safety helmets
GEFU® thread-rolling screw With Taptite 2000® thread, countersunk head and hexalobular drive
Compact workshop trolley
CA preparation unit size 1, lockable
Safety boots, S1
New Craft quilted jacket
Long sanding belt metal CERALINE
Pan Head screw with hexalobular head ISO 14583, steel 8.8, plain
Feather key, high profile DIN 6885, steel C 45 K, plain, shape A
