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ASSY® 4 CSMR sports floor screw Steel zinc plated full thread countersunk milling head

ASSY 4 CSMR sports floor ST zp FT cs mill. head RW

Art.-no. 016364030
EAN 4061975619471

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Special collated full-thread screw with countersunk head with milling pockets for series fastening of particleboard flooring in indoor dry or wet areas

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

Easy countersinking in hardwood/softwood with high knot content as well as hard wood fibreboards

  • Very high milling performance due to milling ribs located at the countersunk head

No over-tightening or stripping and high feed

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

  • Better anchoring thanks to higher thread flanks

Ideal for friction-free screw fitting in plastic, such as in dowels or in homogeneous highly compressed wooden materials

  • Screw bites rapidly through the continuous thread design to the tip of the screw

  • Non-spreading screwing in thanks to tip geometry without any component to reduce splitting
  • 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

Product information


Certificates/ Documents



Application area

Quick series fitting for panel material-wood connectors

  • For all manual trade applications

  • With hand-held devices for collated screws

  • The full thread starting immediately below the head allows for e.g. panel material to wood connection possible. 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 ∅ > 4 mm in utilisation class 2 (wet area or covered outdoor area) according to EN 1995-1-1:2010-12 + DIN SPEC 1052-100:2013-08
  • 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 reinforcing and creating high-load-bearing connections of two components. Components should be connected without any gap



Nominal diameter (d)

4 mm

Length (l)

30 mm

Thread length (lg)

24 mm

Head type

Countersunk milling head

Head diameter (dh)

8 mm

Head height (k)

3.2 mm

Head details

Milling ribs

Internal drive


Thread type

Wood screw thread

Thread form

Single start thread

Thread design

Full thread

Core diameter

2.6 mm

Shape of tip


Angle of the tip

20 Degree




Hardened steel


Zinc plated

Max. screw-in angle

90 Degree

Min. screw-in angle

0 Degree

Suitable for use in the following materials

Board ply wood (BSP)
Derived timber product

Area of application

Timber construction
Interior fitting
Sports floor

Suitable machines

Prebena 9D-62-45 CS
Holz-Her 3337 magazine screwdriver
Holz-Her 3350 magazine screwdriver
Holz-Her 3352 magazine screwdriver
Holz-Her 3362 magazine screwdriver
Würth ASSYmat 50 with HS 16





Additional accessory:
RW® bit


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


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


The perfect bit for the new generation of ASSY screws
x 5 pcs
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Cust. Mat. No.

Hazardous Material

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