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ASSY® 4 A2 CS fittings screw A2 stainless steel plain full thread countersunk head

ASSY 4 A2 CS sst A2 FT countersunk head RW
SCR-CS-WO-A2-RW20-4X30/24
ASSY 4 A2 CS

Art.-no. 018724030
EAN 4061975614537

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ASSY® 4 A2 CS fittings screw A2 stainless steel plain full thread countersunk head

Art.-no. 018724030

Prices for customers after login
Quantity
PU
x 200 pcs

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Full-thread screw made of high-quality austenitic A2 stainless steel with countersunk head for fixing metal profiles or fittings in wood in outdoor areas exposed to the elements or interior applications constantly exposed to corrosion

Ideal power transmission thanks to RW drive


  • More power due to larger contact area at the bit

  • More stability, one-handed working, precise positioning due to the tight-fit recess and perfect fit of the bit

  • Fewer bit changes, one bit for many screw diameters

  • Compatibility with previous AW drive


Form-fitting connection to metal fittings or in wooden products with high bulk density


  • For fitting connection with full-thread steel screws

  • Perfect fit of 90° head in fitting parts with metal countersinks

  • Pulls together without head milling due to lack of milling elements below the head

  • The head is inserted by pressing


Higher breaking torque


  • Higher power transmission in hardwoods due to reinforced, asymmetrical thread flank geometry of the single thread

  • Better anchoring thanks to higher thread flanks


Smooth thread start ensures optimised recessing and biting of the screw


  • Reduced splitting effect due to displacement effect of the dome-shaped milling elements in the tip

  • Friction-reduced thread rotation allows reduction of the screw-in force to be applied


Stainless mounting for accessible wood connections in outdoor areas exposed to weathering


  • Made of austenitic, non-magnetic and non-rusting A2 stainless steel

  • Can be used in rural or urban environments or industrial atmospheres without significant exposure to chlorides or SO2

  • With friction-reducing slide coating for easy fastening
Proof of Performance

ETA-11/0190 approved

Notice
  • 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

  • We recommend using the Würth software or the corresponding design aids for planning and dimensioning your assembly. Use the Würth timber construction software for dimensioning of ASSY screws from a diameter of 5 mm

  • ASSY 4, ASSYplus 4 and ASSYplus 4 FT chipboard screws are optimised for use in wood and wood materials. For applications in plastic anchors where load capacity can also be reduced, use only screws without an optimised thread tip (tip with milling ribs, drill tip, self-clearing groove etc.), such as the ASSY D screws with countersunk head or pan head
Application area

ETA-11/0190 approved

The requirements of the European Technical Approval (ETA) must be observed

Product information

Datasheets(X)

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Application area

For steel-wood connections designed for tensile forces


The full thread starting immediately below the head allows for e.g. fitting-wood or sheet material-wood connections designed for tensile forces with high load-bearing capacity. Greater screw pull-out force is achieved by the maximum thread length.



Can be used for outdoor applications and utilisation class 3

Instructions
  • ASSY screws are approved for quasi-static loads

  • For optimum use of the screw, the right-size RW bit must be used

  • Full-thread screws are suitable for secure mounting of fittings or thin materials. The screw length to be selected should be less than the plate thickness of substrate the screw is to be driven in

  • If countersunk head screws are used for a metal-to-wood mounting, the metal to be connected must be provided with suitable countersunk holes

Nominal diameter (d)

4 mm

Length (l)

30 mm

Head type

Countersunk head

Head diameter (dh)

8 mm

Head height (k)

2.5 mm

Internal drive

RW20

Thread type

Wood screw thread

Thread design

Full thread

Thread form

Single start thread

Thread length (lg)

24 mm

Core diameter

2.5 mm

Shape of tip

Tip with hilltop milling cutter

Angle of the tip

28 Degree

Material

Stainless steel A2

Surface

Plain

Min./max. screw-in angle

0-90 Degree

Product weight (per item)

1.795 g

Suitable for use in the following materials

Wood
Derived timber product
Softwood
Board ply wood (BSP)
Hardwood
LVL

Area of application

Façades
Terrace
Fence
Structural woodwork
Wet areas
Balcony
Board walk
Play equipment
Outdoors

Suitable machines

Würth BS 12-A Power
Würth BS 14-A Combi

Approval

ETA-11/0190

Screw requiring approval

Yes

RoHS-compliant

Yes

Shear load
Bracket between force and grain direction α = 0°Bracket between force and grain direction α = 90°
Minimum clearances for non-pre-drilled screws in wooden components ρk ≤ 420 kg/m3
Screw diameterMale thread diameter in mmScrew diameterMale thread diameter in mm
Dia. 3 to 4.5 mmDia. 5 to 14 mm33,544,556Dia. 3 to 4.5 mmDia. 5 to 14 mm33,544,556
a110 x d12 x d3035404560725 x d5 x d151820232530
a25 x d5 x d1517,52022,525305 x d5 x d151820232530
a3,t15 x d15 x d4552,56067,5759010 x d10 x d303540455060
a3,c10 x d10 x d30354045506010 x d10 x d303540455060
a4,t5 x d5 x d1517,52022,525307 x d10 x d212528325060
a4,c5 x d5 x d1517,52022,525305 x d5 x d151820232530
1) The minimum clearances are specified in accordance with DIN EN 1995-1-1 tab. 8.2 for non-pre-drilled nail holes, where d is the male thread diameter
2) The minimum distances between 0° < α < 90° force to the direction of the grain can be calculated more precisely in accordance with DIN EN 1995-1-1 tab. 8.2
Additional accessory:
 
Product
Description
Quantity
PU
Price
/PU
RW® bit

BIT-RW20-LUMINOUSORANGE-1/4ZO-L25MM

The perfect bit for the new generation of ASSY screws
x 10 pcs
RW® bit

BIT-RW20-LUMINOUSORANGE-1/4ZO-L50MM

The perfect bit for the new generation of ASSY screws
x 5 pcs
RW® bit

BIT-RW20-LUMINOUSORANGE-1/4ZO-L120MM

The perfect bit for the new generation of ASSY screws
x 5 pcs
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