ASSY^® 4 WH post screw Steel zinc plated full thread washer head

Name: ASSY ® 4 WH post screw Steel zinc plated full thread washer head
Brand: Würth
SKU: 017730850

ASSY 4 WH steel zinc plated FT washer head RW
SCR-SK-WO-RW40-(A3K)-8X50/40
ASSY 4 WH

Art.-no. 017730850

EAN 4061975617668

All versions

Specification

Full-thread screw with large washer head for fastening metal parts or thin plywood boards in the packaging area in wood 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

Visually appealing screw connection on wood surface

Very high head pull-through values and strong tightening effect thanks to a large head diameter

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

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

High strength values and ductility

Adjusted heat treatment guarantees high strength values and high ductility

Notice

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

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 WH or ASSY 4 A2 BP 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

Application

Application area

For steel-wood connections designed for tensile forces

The full thread starting immediately below the head allows for e.g. fitting-wood or sheet material-wood connections designed for tensile forces with high load-bearing capacity. 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 8 µm layer thickness

Suitable for use in utilisation class 1 (interior) and from ∅ > 4 mm in utilisation class 2 (covered outdoor area) according to EN 1995-1-1:2010-12 + DIN SPEC 1052-100:2013-08

The requirement of classification T2/C2 is fulfilled in accordance with prEN 14592:2017 (D)

Instructions

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 secure mounting of fittings or thin materials. The screw length to be selected should be less than the plate thickness of substrate the screw is to be driven in

Technical information


Nominal diameter (d)	8 mm
Longueur (l)	50 mm
Thread length (lg)	40 mm
Head type	Round washer head
Head diameter (d_h)	22.1 mm
Head height (k)	3.8 mm
Internal drive	RW40
Thread type	Wood screw thread
Thread design	Partial thread
Thread form	Coarse thread
Core diameter	5.3 mm
Shape of tip	Tip with hilltop milling cutter
Angle of the tip	34 Degree
Matière	Hardened steel
Finition	Zinc plated
Couleur	Silver
Max. screw-in angle	90 Degree
Min. screw-in angle	0 Degree
Suitable for use in the following materials	Wood, Derived timber product, Softwood, Board ply wood (BSP), Hardwood, LVL, Construction beech
Area of application	Structural woodwork, Post screws, Timber construction, Packaging
Approval	ETA-11/0190
RoHS-compliant	Yes

Documents

Product information

Würth Catalogue (2)

Flip Book

Catalogue page as PDF 1

Datasheets (0)

Certificates/ Documents (4)

Approval/Assessment 1

Approval/Assessment 2

Approval/Assessment 3

Approval/Assessment 4

CAD data

Click here for the complete CAD library.

Accessory

Additional accessory:

Product

Description

Quantity

Price
/PU

RW® bit

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

Art.-no. 061470 40

The perfect bit for the new generation of ASSY screws

x 10 pcs

RW® bit

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

Art.-no. 061471 40

The perfect bit for the new generation of ASSY screws

x 5 pcs

RW® bit

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

Art.-no. 061472 40

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 v

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.

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