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ASSY® 4 CS fittings screw Steel zinc plated full thread countersunk head

Article No. 019004020

ASSY 4 CS steel zinc plated FT countersunk head RW SCR-CS-WO-RW20-(A2K)-4X20/16 ASSY 4 CS

€2.43 inc. VAT price per 100 PCS

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Full-thread screw with countersunk head for fastening fittings or cabinet connectors in wood or wooden panels in indoor dry or sheltered areas

Ideal power transmission thanks to RW recess

More power due to larger contact area at the bit
More stability, one-handed working and 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

Positive 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 fittings with metal countersinks
Tight joint without head milling due to lack of milling elements below the head
The head is countersunk by pressing

Maximum overtightening safety with high feed performance

Higher power transmission in hardwoods due to reinforced, asymmetrical thread flank geometry of the coarse thread
Better anchorage thanks to higher thread flanks

Smooth thread start ensures optimised recessing and biting of the screw

Reduced splitting thanks to displacement effect of the dome-shaped milling elements in the tip
Reduced-friction thread rotation allows reduction of the screw-in force that is applied

Notice

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
Do not use the screw in applications with direct exposure to the elements or in humid rooms with atmospheres containing chlorine gas. If used outdoors and in rooms that are constantly exposed to high humidity, please use ASSY 4 A2 or A4 stainless steel screws and, if atmosphere contains chlorine, HCR stainless steel screws
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

ETA-11/0190 approved

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

Specification
Application
Technical Information
Documents

Full-thread screw with countersunk head for fastening fittings or cabinet connectors in wood or wooden panels in indoor dry or sheltered areas

Ideal power transmission thanks to RW recess

More power due to larger contact area at the bit
More stability, one-handed working and 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

Positive 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 fittings with metal countersinks
Tight joint without head milling due to lack of milling elements below the head
The head is countersunk by pressing

Maximum overtightening safety with high feed performance

Higher power transmission in hardwoods due to reinforced, asymmetrical thread flank geometry of the coarse thread
Better anchorage thanks to higher thread flanks

Smooth thread start ensures optimised recessing and biting of the screw

Reduced splitting thanks to displacement effect of the dome-shaped milling elements in the tip
Reduced-friction thread rotation allows reduction of the screw-in force that is applied

Notice

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
Do not use the screw in applications with direct exposure to the elements or in humid rooms with atmospheres containing chlorine gas. If used outdoors and in rooms that are constantly exposed to high humidity, please use ASSY 4 A2 or A4 stainless steel screws and, if atmosphere contains chlorine, HCR stainless steel screws
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

ETA-11/0190 approved

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

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.

For applications in utilisation class 1 and utilisation class 2 (from ∅ > 4 mm)

High-quality surface protection, zinc, blue-passivated chromium(VI)-free 5 µm layer thickness

Suitable for use in utilisation class 1 (interior) and from a ∅ > 4 mm in utilisation class 2 (covered outdoor area) according to EN 1995-1-1:2010-12 + DIN SPEC 1052-100:2013-08

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

Products specifications

Nominal diameter (d)	4 mm
Length (l)	20 mm
Head type	Countersunk head
Head diameter (d_h)	8 mm
Head height (k)	2.5 mm
Internal drive	RW20
Thread type	Wood screw thread
Thread design	Full thread
Thread format	Coarse thread
Thread length (lg)	16 mm
Core diameter	2.5 mm
Shape of tip	Tip with hilltop milling cutter
Angle of the tip	34 Degree
Material	Hardened steel
Surface	Zinc plated
Colour	Silver
Min./max. screw-in angle	0-90 Degree
Product weight (per item)	1.220 g
Suitable for use in the following materials	Wood<br>Derived timber product<br>Softwood<br>Board ply wood (BSP)<br>Hardwood<br>LVL
Area of application	Universal<br>Furniture<br>Body<br>Fitting
Suitable machines	Würth BS 12-A Power<br>Würth BS 14-A Combi
Approval	ETA-11/0190
Screw requiring approval	Yes
RoHS-compliant	Yes

Datasheet

Products specifications

Nominal diameter (d)	4 mm
Length (l)	20 mm
Head type	Countersunk head
Head diameter (d_h)	8 mm
Head height (k)	2.5 mm
Internal drive	RW20
Thread type	Wood screw thread
Thread design	Full thread
Thread format	Coarse thread
Thread length (lg)	16 mm
Core diameter	2.5 mm
Shape of tip	Tip with hilltop milling cutter
Angle of the tip	34 Degree
Material	Hardened steel
Surface	Zinc plated
Colour	Silver
Min./max. screw-in angle	0-90 Degree
Product weight (per item)	1.220 g
Suitable for use in the following materials	Wood<br>Derived timber product<br>Softwood<br>Board ply wood (BSP)<br>Hardwood<br>LVL
Area of application	Universal<br>Furniture<br>Body<br>Fitting
Suitable machines	Würth BS 12-A Power<br>Würth BS 14-A Combi
Approval	ETA-11/0190
Screw requiring approval	Yes
RoHS-compliant	Yes