Welcome to Würth Aerospace Solutions For trade customers only

ASSY® 4 A2 CSMP timber screw A2 stainless steel plain partial thread countersunk milling pocket head

ASSY 4 A2 CSMP sst A2 PT cs mill. pckt RW
SCR-CS-CTRHD-WO-A2-RW40-8X180/80
ASSY 4 A2 CSMP

Art.-no. 0187480180
EAN 4061975615510

Prices for customers after login
ASSY® 4 A2 CSMP timber screw A2 stainless steel plain partial thread countersunk milling pocket head

Art.-no. 0187480180

Prices for customers after login
Quantity
PU
x 75 pcs

Exclusively for trade customers

Register now and access more than 125,000 products

Universal partially thread screw made of high-quality austenitic A2 stainless steel for wood-wood connections (spruce) in outdoor areas exposed to the elements

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


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)

Certificates/ Documents

 | 

 | 

Application area

For wood-wood connections designed to pull together


The partial thread starting immediately below the shank allows for wood-wood connections designed to pull together. The screw thread is positioned entirely in the lower component once screwed in.



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

  • 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)

180 mm

Thread length (lg)

80 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

Single start thread

Core diameter

5.1 mm

Shape of tip

Tip with hilltop milling cutter

Angle of the tip

34 Degree

Material

Stainless steel A2

Surface

Plain

Min./max. screw-in angle

0-90 Degree

Suitable for use in the following materials

Board ply wood (BSP), Hardwood, LVL

Area of application

Façades, Terrace, Fence, Structural woodwork, Element construction, Timber panel construction, Timber construction, Wet areas, Play equipment, Outdoors

Suitable machines

Würth BS 18-A Power

Screw requiring approval

Yes

Approval

ETA-11/0190

RoHS-compliant

Yes

Edge distances in wood with an axial load
Remarks:
The values apply to a minimum thickness of the component of 10 x d
The minimum insertion 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 observed in the same way
Minimum clearances in mm for screws in cross laminated timber
Side surfaces Front surfaces
d in mm a1 a2 a3,t a3,c a4,t a4,c d in mm a1 a2 a3,t a3,c a4,t a4,c
4 x d 2.5 x d 6 x d 6 x d 6 x d 2.5 x d 10 x d 4 x d 12 x d 7 x d 6 x d 3 x d
8 32 20 48 48 48 20 8 80 32 96 56 48 24
Pre-drilling diameter according to ETA-11/0190 in mm
d in mm 8
Softwood 5,0
Hardwood 6,0
BauBuche1) 6,5
1) According to 1459 expert report SWG ASSY BauBuche
Minimum distances in mm for pre-drilled screws in softwood, hardwood, BauBuche
Bracket between force and grain direction α = 0° Bracket between force and grain direction α = 90°
d in mm a1 a2 a3,t a3,c a4,t a4,c d in mm a1 a2 a3,t a3,c a4,t a4,c
5 x d 3 x d 12 x d 7 x d 3 x d 3 x d 4 x d 4 x d 7 x d 7 x d 7 x d 3 x d
8 40 24 96 56 24 24 8 32 32 56 56 56 24
1) The minimum clearances are specified in accordance with DIN EN 1995-1-1 tab. 8.2 for 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 determined more precisely in accordance with EN 1995-1-1 tab. 8.2
Edge distances in cross laminated timber under shear load
Remarks:
If the spacing between the screws in the direction of the grain and from the end of the end of the grain is at least 25 x d, the spacing to the unstressed edge may be reduced to 3 x d, even with component thicknesses 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 screws should always be pre-drilled and the
For steel-wood connections, the minimum distances (a1, a2) can be multiplied by a coefficient of 0.7
For wooden plate connections, the minimum distances (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%
Edge distances in wood under shear load
Bracket between force and grain direction α = 0° Bracket between force and grain direction α = 90°
Stressed end of
the end grain
-90° < < α 90°
Unstressed end of
the end grain
90° < α < 270°
Stressed edge
0° < α < 180°
Unstressed edge
180° < α < 360°
Remarks:
The minimum distances are defined in accordance with EN 1995-1-1 tab. 8.6, where d is the male thread 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 clearances for screws and shear stress must be used
Minimum clearances in mm for screws in wooden components
DIN EN 1995-1-1 a1 a2 a1,CG a2,CG
ETA-11/0190 a1 a2 a1,c a2,c
d in mm 7 x d 5 x d 10 x d 4 x d
8 56 40 80 32
Minimum distances in mm for non-pre-drilled screws in wooden components 420 kg/m3 ρk ≤ 500 kg/m3
Bracket between force and grain direction α = 0° Bracket between force and grain direction α = 90°
d in mm a1 a2 a3,t a3,c a4,t a4,c d in mm a1 a2 a3,t a3,c a4,t a4,c
15 x d 7 x d 20 x d 15 x d 7 x d 7 x d 7 x d 7 x d 15 x d 15 x d 12 x d 7 x d
8 120 56 160 120 56 56 8 56 56 120 120 96 56
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 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 clearances between 0° < α < 90° force to the direction of the grain can be fixed more precisely in accordance with EN 1995-1-1 tab. 8.2
4) Wooden components with ρk > 500 kg/m3 must always be pre-drilled
Minimum distances in mm for non-pre-drilled screws in wooden components ρk ≤ 420 kg/m3
Bracket between force and grain direction α = 0° Bracket between force and grain direction α = 90°
d in mm a1 a2 a3,t a3,c a4,t a4,c d in mm a1 a2 a3,t a3,c a4,t a4,c
12 x d 5 x d 15 x d 10 x d 5 x d 5 x d 5 x d 5 x d 10 x d 10 x d 10 x d 5 x d
8 96 40 120 80 40 40 8 40 40 80 80 80 40
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 determined in accordance with DIN EN 1995-1-1 tab. 8.2
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
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

Product information

Datasheets()

Datasheets ()

CAD data  | 

Certificates/ Documents

 | 

 | 

Technical information