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ASSY®plus 4 A2 TH glass strip screw A2 plain stainless steel partial thread top head 60°

ASSYplus 4 A2 TH A2 stainless steel PT top head RW

Art.-no. 0166135040
EAN 4062856218530

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Special Partial Thread screw made of high quality, austenitic A2 stainless steel with small top head and milling ribs. Suitable for gap free fastening close to edges of delicate glass strips or skirting boards in outdoor areas constantly exposed to weathering.

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

Precise positioning and very clean drilling due to advanced centring drill tip

  • Positioning and drilling without chipping

  • Maximum drilling performance and precise drilling process through drilling cutting edges (similar to Forstner bits)

  • Precise positioning on hard surfaces without slipping thanks to centring pin

  • Quick screwing due to gentle start of thread

Well-designed, unobtrusive mounting of wooden components

  • Small screw head with lens-shaped rounded head for well-designed, unobtrusive mounting

  • Highly effective milling ribs prevent narrow wooden profiles from splitting

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

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 screwing
  • We recommend using the Würth software or corresponding design aids for planning and designing your installation. Dimensioning the ASSY screws can be carried out in the Würth timber construction software from a dia. of 5 mm

  • ASSY 4, ASSYplus 4 and ASSYplus 4 VG chipboard screws are optimised for use in wood and engineered wood. 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

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

  • 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

  • ASSY screws are approved for quasi-static loads

Nominal diameter (d)

3.5 mm

Length (l)

40 mm

Thread length (lg) (lg)

22 mm

Screw-thread length with drill tip (b) (b)

25.5 mm

Head type

Top head

Head details

Milling ribs

Head diameter (dh)

5.2 mm

Head height (k)

3.1 mm

Internal drive


Thread type

Wood screw thread

Thread design

Partial thread


With shaft

Thread form

Single start thread

Core diameter

2.5 mm

Shape of tip

Drilling tip


Stainless steel A2



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

Element construction
Wet areas
Timber construction
Timber panel construction
Structural woodwork
Play equipment
Board walk



Product weight (per item)

2.500 g



Additional accessory:


x 1 pcs


The perfect bit for the new generation of ASSY screws


The perfect bit for the new generation of ASSY screws


The perfect bit for the new generation of ASSY screws

Packaging unit

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.

Structure of our article number

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:
00574 10 (2 spaces between the 4 and the 10)

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

Example 3: Flat washer with an internal diameter of 6 mm:

Information on price display

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).

Cust. Mat. No.

Hazardous Material

Product information


Datasheets ()

CAD data  | 

Certificates/ Documents



Technical information