ASSY^®plus 4 CSMP SPECIAL universal screw Hardened zinc-plated steel partial thread countersunk head

Name: ASSY ® plus 4 CSMP SPECIAL universal screw Hardened zinc-plated steel partial thread countersunk head
Brand: Würth
SKU: 0178914055

ASSYplus 4 CSMP SPECIAL, z-p. steel PT c/s m.h. RW
SCR-CSMP-DBIT-WO-RW20-(A2K)-4X55/35
ASSYPLUS 4 CSMP SPECIAL

Art.-no. 0178914055

EAN 4061975503480

All versions

Specification

Universal partial thread with countersunk head with milling pockets. Suitable for gap-free attachment close to edges without pre-drilling of wood-wood connections in indoor dry or sheltered 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

Small edge distances

Drilling in locations with small permissible edge distances (3xd) is possible thanks to a wedge-shaped drill tip with parallel cutting edges

Assembly without gaps

The wood does not split and rupture

Little run-off of long screws

Clean countersinking in softwood or wood material

Easy countersinking of screw head in wood thanks to optimised milling pockets

No chipping in coated chipboards due to improved milling effect and increased number of milling pockets up to ∅ 4.5 mm

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

Maximum reliability of the screw connection due to asymmetrical single thread

Optimal matching of drill tip and thread geometry

Excellent anchoring in wood due to asymmetrical arrangement of thread flanks

Notice

Do not use the screw in applications with direct exposure to the elements or in humid rooms with atmospheres containing chlorine gas. Please use ASSYplus 4 stainless steel screws for outdoor applications and rooms with constant high humidity

We recommend using the Würth software or the corresponding design aids for planning and dimensioning your assembly. Dimensions of the ASSY screws can be carried out in the Würth timber construction software from a ∅ 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

ETA-11/0190 approved

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

Application

Application area

For wood-wood connections designed to pull together

A wood-wood connection designed to pull together is possible owing to partial thread starting immediately after the shank. The thread in this case is positioned entirely in the lower second component.

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

Instructions

To increase the joining effect or head pull-through resistance, combining with perfectly fitting washers for ASSY 4 is recommended

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

Partial-thread screws are ideal for connecting wooden components. To achieve optimum assembly of the components, the components to be fixed must not be thicker than the length of the shank

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

For a load-bearing wood-metal connection, ASSY screws must be tightened to a specific torque value. Tightening torque = required prevailing torque x 1.2 < 90% of the breaking torque

Technical information


Nominal diameter (d)	4 mm
Length (l)	55 mm
Thread length (lg) (l_g)	35 mm
Screw-thread length with drill tip (b) (b)	38 mm
Head type	Countersunk head
Head details	Milling pockets
Head diameter (d_h)	8 mm
Head height (k)	2.5 mm
Internal drive	RW20
Thread type	Wood screw thread
Thread design	Partial thread
Design	With shaft
Thread form	Single start thread
Core diameter	2.5 mm
Shape of tip	Drilling tip
Material	Hardened steel
Surface	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), Wood, Derived timber product, Hardwood, LVL, Softwood, Construction timber (KVH), OSB, Chipboard, Solid wood panel (SWP)
Area of application	Furniture, Body, Store construction, Exhibition stand construction, Interior fitting
Approval	ETA-11/0190
Product weight (per item)	5.000 g
RoHS-compliant	Yes

Documents

Product information

Datasheets (0)

Certificates/ Documents (0)

Accessory

Additional accessory:

Product

Description

Quantity

Price
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