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ASSY® 4 CSMP universal screw Steel zinc plated partial thread countersunk milling pocket head

ASSY 4 CSMP steel zinc ptd. PT cs mill. pocket RW
SCR-CSMP-WO-RW40-(A3K)-8X240/100
ASSY 4 CSMP

Art.-no. 0190180240
EAN 4061975613592

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ASSY® 4 CSMP universal screw Steel zinc plated partial thread countersunk milling pocket head

Art.-no. 0190180240

Prices for customers after login
Quantity
PU
x 75 pcs

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Universal partial-thread screw for fast, gap-free fastening of wood-wood connections in furniture construction, interior fitting or wood construction 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, precise positioning due to the tight-fit recess and perfect fit of the bit

  • Fewer bit changes, 1 bit for many screw diameters

  • Compatibility with previous AW drive


Significant reduction in the amount of force required when screwing in the screw


  • Low gap effect when immersing the shank due to the displacement milling effect of the milling shank

  • Minimised risk of screw breakage due to high breaking torque

  • Reduced risk of injury from protruding metal chips due to the integration of the milling shank into the thread

  • High protection of the application tools


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 anchorage thanks to higher thread flanks


Smooth thread start ensures optimised recessing and biting of the screw


  • Low gap 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


High strength values and ductility


  • Adjusted heat treatment guarantees high strength values and high ductility
Proof of Performance

ETA-11/0190 approved

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
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

Parallel drive size RW30 is available for window applications with a diameter of 6 mm. This makes it easier to combine with AMO screws equipped with RW30.



For wood-to-wood connections designed for contraction


The partial thread starting immediately below the shank allows for wood-to-wood connections designed for contraction. In this case the thread is positioned entirely in the lower second component.



For applications in utilisation classes 1 and 2 (from dia. > 4 mm)


  • High-quality surface protection zinc blue passivated chromium(VI)-free, up to dia. 4 mm A2K 5 µm, from dia. 4.5 mm A3K 8 µm layer thickness

  • Suitable for use in utilisation class 1 (indoor areas) and from dia. > 4 mm in utilisation class 2 (wet areas or covered outdoor areas) in accordance with EN 1995-1-1:2010-12 + DIN SPEC 1052-100:2013-08

  • For screws from dia. 4.5 mm with zinc layer thickness 8 µm with Cr(III) passivation, the requirement of classification T2/C2 is fulfilled in accordance with prEN 14592:2017 (D)
Instructions
  • To increase the joining effect or head pull-through resistance, combining with perfectly fitting washers for ASSY 4 is recommended

  • ASSY screws are approved for quasi-static loads

  • 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

Nominal diameter (d)

8 mm

Length (l)

240 mm

Thread length (lg)

100 mm

Head type

Countersunk milling pocket head

Head details

Milling pockets

Head diameter (dh)

15 mm

Head height (k)

4.9 mm

Internal drive

RW40

Thread type

Wood screw thread

Thread design

Partial thread

End milling cutter

Yes

Thread form

Coarse thread

Core diameter

5.3 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

Suitable for use in the following materials

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

Area of application

Universal
Timber construction
Element construction
Timber panel construction
Structural woodwork
Interior fitting
On rafter insulation
Roof

Suitable machines

Würth BS 18-A Combi
Würth BS 13 SEC
Würth BS 28-A Combi

Screw requiring approval

Yes

Approval

ETA-11/0190

RoHS-compliant

Yes

General information
The load capacities were determined in accordance with ETA-11/0190 (23.07.2018), DIN EN 1995-1-1:2010-12 and DIN EN 1995-1-1/NA:2013-08 for ASSY® screws without pre-drilling and a gross wood density of ρk ≥ 350 kg/m3. The load tables show a comprehensive range of options. Additional measurement options are available using the Würth Technical Software. Further information is available at www.wuerth.de/assy.
The shear load resistance values Fv,Rk in the table have been determined taking into account the "rope effect" ΔFv,Rk. In the case of simultaneous axial and lateral loads, the shear load capacities listed in the table may not be used. If proof of combined load is required, the requirement of DIN EN 1995-1-1, Gl. (8.28) applies, whereby Fv,Rk is to be considered without rope effect component. The Würth Technical Software can be used for the latter.
Product:ASSY 4 CSMPScrew material:Steel, hardened
Art. no.:0190 1XX XXXCorrosion protection:A3K
Application:Wood/wood, single shear connectionMaximum usage class:2
Gross weight wood 1/wood 2:350 kg/m3/350 kg/m3Calculation basis:ETA-11/0190:2018
Load tables
Combined load
Shear resistance Fv,Rk for a 90° wood/wood connection to wood fibre
with required minimum screw length ℓreq
With washer/countersunk washerWith washer/countersunk washerWith washer/countersunk washer
Fv,RkreqFv,RkreqFv,RkreqFv,RkreqFv,RkreqFv,RkreqFv,RkreqFv,Rkreq
mmkNmmkNmmkNmmkNmmkNmmkNmmkNmmkNmm
241,28551,71602,0980 2,41100
301,43701,85702,23802,7380 2,591003,56120
401,48802,10802,53903,011003,981002,841103,841205,12140
501,48902,10902,651003,341204,341202,841204,171405,47140
601,481002,101002,651203,471204,731402,841304,301405,87160
801,511202,101302,651403,471404,811602,841504,301605,95180
1001,201202,101502,651603,471604,811802,841804,301805,95200
120 2,101802,651803,471804,812002,842004,302005,95220
140 2,102002,652003,472004,812202,84220 5,95240
160 2,102202,652203,472404,812402,842404,302405,95260
180 2,102402,652403,472604,812602,842604,302605,95280
200 2,102602,652603,472804,812802,842804,302805,95300
220 2,102802,652803,473004,813002,843004,303005,95320
240 2,103002,653003,473204,813202,673004,303205,95340
260 2,103002,653003,473404,813402,323004,303405,95360
280 3,473604,81360 4,303605,95380
300 3,473804,81380 4,303805,95400
320 3,474004,81400 4,304005,90400
t1∅ 5∅ 6∅ 7∅ 8∅ 10∅ 6∅ 8∅ 10
Pull-out resistance Fax,Rk for a 90° wood/wood connection to wood fibre
with required minimum screw length ℓreq
With washer/countersunk washerWith washer/countersunk washerWith washer/countersunk washer
Fax,RkreqFax,RkreqFax,RkreqFax,RkreqFax,RkreqFax,RkreqFax,RkreqFax,Rkreq
mmkNmmkNmmkNmmkNmmkNmmkNmmkNmmkNmm
241,20451,87602,4480 4,84100
301,20501,87602,44802,9380 4,841106,25120
401,20601,87702,44802,93804,451004,841206,251209,00140
501,20701,87802,44902,931004,451004,841306,251409,00140
601,20801,87902,441002,931004,451204,841406,251409,00160
801,201101,871302,441202,931404,451404,841606,251609,00180
1001,201201,871502,441402,931604,451604,841806,251809,00200
120 1,871802,441802,931804,451804,842006,252009,00220
140 1,872002,442002,932004,452004,842206,252209,00240
160 1,872202,442202,932404,452204,842406,252409,00260
180 1,872402,442402,932604,452404,842606,252609,00280
200 1,872602,442602,932804,452604,842806,252809,00300
220 1,872802,442802,933004,452804,843006,253009,00320
240 1,873002,443002,933204,453003,833006,253209,00340
260 1,873002,443002,933404,453402,453006,253409,00360
280 2,933604,45360 6,253609,00380
300 2,933804,45380 6,253809,00400
320 2,934004,45400 6,254008,03400
t1∅ 5∅ 6∅ 7∅ 8∅ 10∅ 6∅ 8∅ 10
KeyGeneral information
αAngle between screw axis and grain direction of the componentCarbon steel screws may be used in usage classes 1 and 2
t1Thickness of component at head endFor connections with multiple screws, observe the effective number, nef, in acc. with DIN EN 1995-1-1,
t2Component 2: t2 ≥ ℓreq - t1 (observe minimum component thicknesses) Gl. (8.17) for shear loads and in acc. with ETA-11/0190, A.2.3.2 for axial loads
Fv,RkCharacteristic resistance of a screw to shearing incl. rope effect to be considered
Fax,RkCharacteristic resistance of a screw in the axial direction (thread pull-out, headSpecifications and pre-requisites in acc. with ETA-11/0190 and DIN EN 1995-1-1 to be adhered to
pull-through, steel failure)When maintaining the minimum component thickness and minimum screw spacings in acc. with
reqRequired screw length to achieve load capacity DIN EN 1995-1-1 and ETA-11/0190, pre-drilling is not necessary
Calculations are based on ETA-11/0190 and DIN EN 1995-1-1
For shear load, the measured load capacity results from Fv,Rd = Fv,Rk · kmod / γM and for
axial load, from Fax,Rd = Fax,Rk · kmod / γM
Edge distances in wood under shear load
Stressed end grain
-90° < α < 90°
Unstressed end grain
90° < α < 270°
Stressed edge
0° < α < 180°
Unstressed edge
180° < α < 360°
Bracket between load and grain direction α = 0°Bracket between load and grain direction α = 90°
Minimum spacing in mm for non-pre-drilled screws in wooden components ρk ≤ 420 kg/m3
10 x d5 x d15 x d10 x d5 x d5 x d 5 x d5 x d10 x d10 x d7 x d5 x d
33015453015153151530302115
3,53517,552,53517,517,53,517,517,5353524,517,5
44020604020204202040402820
4,54522,567,54522,522,54,522,522,5454531,522,5
12 x d5 x d15 x d10 x d5 x d5 x d 5 x d5 x d10 x d10 x d10 x d5 x d
56025755025255252550505025
723090603030 303060606030
8435105703535 353570707035
9640120804040 404080808040
120501501005050 505010010010050
1) The minimum spacing is determined in accordance with DIN EN 1995-1-1 tab. 8.2 for non-pre-drilled nail holes, where d is the thread outer diameter
2) The minimum spacing between 0° < α < 90° load to the direction of the grain can be determined more precisely in accordance with DIN EN 1995-1-1 tab. 8.2
Bracket between load and grain direction α = 0°Bracket between load and grain direction α = 90°
Minimum spacing in mm for non-pre-drilled screws in wooden components 420 kg/m3 ρk ≤ 500 kg/m3
d in mma1a2a3,ta3,ca4,ta4,cd in mma1a2a3,ta3,ca4,ta4,c
15 x d7 x d20 x d15 x d7 x d7 x d7 x d7 x d15 x d15 x d9 x d7 x d
34521604521213212145452721
3,552,524,57052,524,524,53,524,524,552,552,531,524,5
46028806028284282860603628
4,567,531,59067,531,531,54,531,531,567,567,540,531,5
15 x d7 x d20 x d15 x d7 x d7 x d 7 x d7 x d15 x d15 x d12 x d7 x d
575351007535355353575756035
690421209042426424290907242
7105491401054949749491051058449
8120561601205656856561201209656
1015070200150707010707015015012070
1) The minimum spacing is determined in accordance with DIN EN 1995-1-1 tab. 8.2 for non-pre-drilled nail holes, where d is the thread outer diameter
2) The minimum spacing also apply to screw diameter ≥ 5 mm in components made of BauBuche (ETA-14/0354) for component thicknesses of t ≥ 7 x d
3) The minimum spacing between 0° < α < 90° load to the direction of the grain can be determined more precisely in accordance with DIN EN 1995-1-1 tab. 8.2
4) Wooden components with ρk > 500 kg/m3 must always be pre-drilled
Bracket between load and grain direction α = 0°Bracket between load and grain direction α = 90°
Minimum spacing in mm for pre-drilled screw connections in softwood, hardwood, BauBuche
d in mma1a2a3,ta3,ca4,ta4,cd in mma1a2a3,ta3,ca4,ta4,c
5 x d3 x d12 x d7 x d3 x d3 x d4 x d4 x d7 x d7 x d5 x d3 x d
3159362199312122121159
3,517,510,54224,510,510,53,5141424,524,517,510,5
42012482812124161628282012
4,522,513,55431,513,513,54,5181831,531,522,513,5
5 x d3 x d12 x d7 x d3 x d3 x d 4 x d4 x d7 x d7 x d7 x d3 x d
52515603515155202035353515
63018724218186242442424218
73521844921217282849494921
84024965624248323256565624
10503012070303010404070707030
1) The minimum spacing is determined in accordance with DIN EN 1995-1-1 tab. 8.2 for pre-drilled nail holes, where d is the thread outer diameter
2) The minimum spacing between 0° < α < 90° load to the direction of the grain can be determined more precisely in accordance with DIN EN 1995-1-1 tab. 8.2
Bracket between load and grain direction α = 0°Bracket between load and grain direction α = 90°
d in mm33,544,5567810
Softwood1,52,02,52,53,04,04,05,06,0
Hardwood2,02,53,03,53,54,05,06,07,0
BauBuche1)2,52,53,03,54,04,55,56,58,0
1) According to 1459 expert report SWG ASSY BauBuche
Pre-drilling diameter acc. to ETA-11/0190 in mm
If the spacing between the screws in the direction of the grain and to the end grain is at least 25 x d, the spacing to the unstressed edge at right angles to the grain direction may be reduced to 3 x d, even with component thicknesses of t < 5 x d
The minimum thicknesses of the components to be connected must be observed in accordance with ETA-11/0190 (A.2.4.2)
When using woods at risk of splitting, the screw connections should always be pre-drilled
For steel-wood connections, the minimum spacing (a1, a2) can be multiplied by a coefficient of 0.7
For wooden plate connections, the minimum spacing (a1, a2) can be multiplied by a coefficient of 0.85
For Douglas fir wooden components, the minimum clearances in the direction of the grain must be increased by 50 %
Notes
Edge distances in cross-laminated timber under shear load
Minimum spacing in mm for screws in cross-laminated timber
d in mma1a2a3,ta3,ca4,ta4,cd in mma1a2a3,ta3,ca4,ta4,c
4 x d2.5 x d6 x d6 x d6 x d2.5 x d10 x d4 x d12 x d7 x d6 x d3 x d
62415363636156602472423618
72817,542424217,57702884494221
83220484848208803296564824
104025606060251010040120706030
Side surfacesFront surfaces
The values apply to a minimum thickness of the component of 10 x d
The minimum embedment depth of the screws in the front surface of the cross-laminated timber is 10 x d
The requirements of the respective manufacturers of cross-laminated timber components must be similarly observed
Notes
Edge distances in wood with an axial load
DIN EN 1995-1-1a1a2a1,CGa2,CG
ETA-11/0190a1a2a1,ca2,c
d in mm7 x d5 x d10 x d4 x d
321153012
3,524,517,53514
428204016
4,531,522,54518
535255020
642306024
749357028
856408032
10705010040
Minimum spacing in mm for screws in wooden components
The minimum spacing is defined in accordance with DIN EN 1995-1-1 tab. 8.6, where d is the thread outer diameter
The minimum thicknesses of the components to be connected must be observed in accordance with ETA-11/0190 (A.2.4.3)
For combined shear and axial tensile loads, the minimum spacing for screws and shear stress must be used
Notes
Required accessory:
 
Product
Description
Quantity
PU
Price
/PU
Screw-in angle 45/60 degrees

SCRINAID-SCR-ASSY-(60-45°)-200X120X30

ASSY
Easy-to-install screw-in angle for quick and precise angled fitting of long ASSY timber screws at an angle of 45 or 60 degrees
x 2 pcs
The packaging unit defines the number of articles in one packaging. In the catalog segment you can choose from different packaging units if a pop-up menu is displayed.

Just leave the field empty if you don't know the packaging unit when directly entering the article number in the shopping basket or when importing with Easy-/VarioScan. The packaging unit will be determined automatically.
The article number is made up of the following: VVVVAAABBB
VVVV = 4 digits for prefix number (please note that the first digit is currently always 0)
AAA = 3 digits for dimension part 1
BBB = 3 digits for dimension part 2

Example article number structures:
Example 1: Screw with dimensions of 4x10 mm:
VVVVAAABBB
00574 10 (2 spaces between the 4 and the 10)

Example 2: Screw with dimensions of 10x20 mm:
VVVVAAABBB
005710 20 (1 space between the 10 and the 20)

Example 3: Flat washer with an internal diameter of 6 mm:
VVVVAAABBB
04076
Price per packaging unit (PU):
The displayed price is always in line with the displayed packaging, if the PU is 250 the price for 250 units, if the PU is 300 the price for 300 units.

Price with price key representation (PSL):
The price always applies to a quantity ruled through the price key:
Price for 1 unit
Price for 100 units
Price for 1000 units
The quantity shows the number of pieces or units of measure contained in the order or delivery for the respective article.
In contrast to sales packaging and secondary packaging, the disposal costs for chemical-technical products are shown separately. The breakdown of the individual costs can be found on the relevant products and also in the shopping cart, as well as in our General Terms and Conditions (GTC).
Additional accessory:
 
Product
Description
Quantity
PU
Price
/PU
RW® bit

BIT-RW40-LUMINOUSPINK-1/4ZO-L25MM

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

BIT-RW40-LUMINOUSPINK-1/4ZO-L50MM

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

BIT-RW40-LUMINOUSPINK-1/4ZO-L120MM

The perfect bit for the new generation of ASSY screws
x 5 pcs
Countersunk washer/washer, deep zinc plated blue

WSH-CS-(A3K)-8,5X28

ASSY
For increasing the head penetration resistance for countersunk head screws with a 90° head
Flat zinc plated blue countersunk washer/washer

WSH-CS-(A3K)-D8,5

ASSY
For increasing the head penetration resistance for countersunk head screws with a 90° head
x 200 pcs
The packaging unit defines the number of articles in one packaging. In the catalog segment you can choose from different packaging units if a pop-up menu is displayed.

Just leave the field empty if you don't know the packaging unit when directly entering the article number in the shopping basket or when importing with Easy-/VarioScan. The packaging unit will be determined automatically.
The article number is made up of the following: VVVVAAABBB
VVVV = 4 digits for prefix number (please note that the first digit is currently always 0)
AAA = 3 digits for dimension part 1
BBB = 3 digits for dimension part 2

Example article number structures:
Example 1: Screw with dimensions of 4x10 mm:
VVVVAAABBB
00574 10 (2 spaces between the 4 and the 10)

Example 2: Screw with dimensions of 10x20 mm:
VVVVAAABBB
005710 20 (1 space between the 10 and the 20)

Example 3: Flat washer with an internal diameter of 6 mm:
VVVVAAABBB
04076
Price per packaging unit (PU):
The displayed price is always in line with the displayed packaging, if the PU is 250 the price for 250 units, if the PU is 300 the price for 300 units.

Price with price key representation (PSL):
The price always applies to a quantity ruled through the price key:
Price for 1 unit
Price for 100 units
Price for 1000 units
The quantity shows the number of pieces or units of measure contained in the order or delivery for the respective article.
In contrast to sales packaging and secondary packaging, the disposal costs for chemical-technical products are shown separately. The breakdown of the individual costs can be found on the relevant products and also in the shopping cart, as well as in our General Terms and Conditions (GTC).

Art.-no.
Cust. Mat. No.

Hazardous Material

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