ASSY^® 3.0 A2 chipboard screw

Name: ASSY ® 3.0 A2 chipboard screw
Brand: Würth
SKU: 018004020

ASSY 3.0 sst A2 full thread cntrsnk head AW
SCR-CS-WO-A2-AW20-4X20/16

Art.-no. 018004020

EAN 4047376904095

All versions

Specification

Universal for fixing fences, balconies, walkways, play equipment in permanently exposed outdoor environments.

Stainless steel A2, full thread, countersunk head, AW drive

Joins wood instead of splitting it

Asymmetrical thread – greater speed

Low screw-in torque

High over-turning force

Faster screwing than conventional particle board screws

Double thread: 3.0–4.5 mm

Coarse thread: 5.0–12.0 mm

AW drive — more power

Optimal force transmission

Excellent fit

Rapid finding

Screw settles securely

Virtually no unscrewing of bit

No wobbling

No damage to surface coating of screw

Only 5 bit sizes for diameters 3.0 to 12.0 mm

Ring thread — less tendency of the wood to split, very few blow-outs

Low splitting forces, in particular when screwing close to edges

Reduction of screw-in torque

Punch effect of ring thread largely prevents blow-outs

Ring thread: 3.0–4.5 mm

Mating thread: 5.0–12.0 mm

Material:

Corrosion-resistant, austenitic stainless steel (1.4301; 1.4567)

Notice

Pre-drilling to the core diameter in solid hard woods

ASSY 3.0 A2 are resistant to acid to a limited extent and are not suitable for use in atmospheres containing chlorine gas

To attach metals to wood, machine a precise cut-out in the metal tab.

ASSY 3.0 chipboard screws are optimised for use in wooden materials. Use in plastic anchors may cause a reduction in the load-bearing capacity. Therefore, we recommend only using screws without optimised thread tips (drill tip, mating thread, ring thread, serrated edge, self-clearing groove etc.) in plastic anchors, e.g. Plug screws, DIN 571 hexagon wood screws or Wüpofast screws.

The range of applications of the various stainless steels is detailed in the following table issued by the ISER (German Information Office for Rustproof Stainless Steel, Non-Rusting Steels for Various Environmental Conditions, www.edelstahl-rostfrei.de, Information Sheet 828). Rustproof stainless steels (e.g. material no. 1.4016) are recommended in terms of atmospheric conditions only for use in a rural environment, and in this respect only subject to significant restrictions. We therefore recommend only using austenitic stainless steels for outdoor applications, taking the environmental conditions into account. Stainless steel A4 is especially suitable for use in an industrial atmosphere and for use near the sea.

Available work documents:

Timber dimensioning software, load tables and detailed processing instructions can be found on the service page www.wuerth.de/assy.

ETA-11/0190

When using these screws, please follow ETA-11/0190 specifications.

Application

Application area

The ASSY 3.0 A2 made from corrosion-resistant, austenitic stainless steel is designed especially for applications outdoors, in damp rooms and in salty atmospheres

Instructions

For coniferous wood or wood-based materials made from softwood, make the fitting without a bradawl. To reduce the edge distances make a predrilled hole according to the core diameter. When screwing into hardwood, drill according to ETA-11/0190.

Technical information


Nominal diameter (d)	4 mm
Length (l)	20 mm
Head type	Countersunk head
Head diameter (d_h)	8 mm
Head height (k)	2.5 mm
Internal drive	AW20
Thread type	Wood screw thread
Thread design	Full thread
Thread form	Single start thread
Thread length (lg)	16 mm
Core diameter	2.5 mm
Shape of tip	Tip with ring thread
Angle of the tip	30 Degree
Material	Stainless steel A2
Surface	Plain
Min./max. screw-in angle	0-90 Degree
Product weight (per item)	1.190 g
Suitable for use in the following materials	Board ply wood (BSP), Wood, Derived timber product, Hardwood, LVL, Softwood
Area of application	Façades, Terrace, Fence, Structural woodwork, Wet areas, Balcony, Board walk, Play equipment, Outdoors
Approval	ETA-11/0190
Screw requiring approval	Yes
RoHS-compliant	Yes

Documents/CAD data

Product information

Würth Catalogue

Datasheets(X)

CAD data (available after login)

Certificates/ Documents

Accessory

Additional accessory:

Product

Description

Quantity

Excl. Vat Price
/PU

Countersunk washer/washer A1 stainless steel

WSH-CS-A1-D4,3

Art.-no. 045754

x 200 pcs

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

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005710 20 (1 space between the 10 and the 20)

Example 3: Flat washer with an internal diameter of 6 mm:
VVVVAAABBB
04076

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