ASSY ^® 3.0 HCR chipboard screw

Name: ASSY ® 3.0 HCR chipboard screw
Brand: Würth
SKU: 0180904050

ASSY 3.0 HCR 1.4529 partial thread cntrsnk head AW
SCR-CS-WO-HCR-1.4529-AW20-4X50/34
ASSY 3.0

Art.-no. 0180904050

EAN 4056807231549

All versions

Specification

Especially suitable for screwing in wooden elements in aggressively corrosive environments. Material no. 1.4529

Minimal splitting effect, especially when screwing in near the edge

Tip with ring thread

Short screw-in times

Asymmetrical coarse thread

Countersunk head with AW drive

Corrosion-resistant HCR stainless steel (material no. 1.4529)

Proof of Performance

ETA-11/0190

Notice

Pre-drilling to the core diameter in solid hard woods

ASSY 3.0 chipboard screws are optimised for use in wooden materials. Use in plastic anchors may cause a reduction in the admissible load. Therefore, when using plastic anchors, we recommend only using screws without optimised thread tips (drill tip, mating thread, ring thread, serrated edge, self-clearing groove etc.), such as Würth ASSY D, prefix number 0151 (countersunk head) and prefix number 0153 (pan head).

When using these screws, the ETA-11/0190 specifications must be observed.

Available work documents:

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

Application area

ETA-11/0190

Application

Application area

ASSY HCR 3.0 are made of highly corrosion-resistant steel, material no. 1.4529 (corrosion resistance class V, Appr. No. Z-30.3-6, suitable for use in indoor swimming pool areas) and are suitable and approved for use in the following areas:

Of ceiling and wall coverings in atmospheres containing chlorine, e.g. indoor pools (water conforming to the Drinking Water Ordinance!)

For components in stables

In woods with a high tannic acid content

Particularly good resistance to very aggressive media such as phosphoric acid, sulphuric acid and hydrochloric acid media, high resistance to pitting and stress corrosion cracking

Instructions

Screw-in angle 0° to 90°. For coniferous wood or wood-based materials made from softwood, the screw connection is made without pre-drilling. To reduce the edge distances, a pre-drilled hole can be made according to the core diameter. When screwing into hardwood, pre-drill according to ETA-11/0190.

Technical information


Nominal diameter (d)	4 mm
Length (l)	50 mm
Head type	Countersunk milling head
Head diameter (d_h)	8 mm
Head height (k)	2.5 mm
Internal drive	AW20
Thread type	Wood screw thread
Thread design	Partial thread
Thread form	Single start thread
Thread length (lg)	34 mm
Core diameter	2.5 mm
Shape of tip	Tip with ring thread
Material	High corrosion-resistant steel, 1.4529, X1NiCrMoCuN25-20-7
Surface	Plain
Min./max. screw-in angle	0-90 Degree
Product weight (per item)	2.900 g
Approval	ETA-11/0190
Screw requiring approval	Yes
RoHS-compliant	Yes

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.
Steel quality Short name	Material no.		Environment
			Country			City			Industry			Close to the sea
			N	M	H	N	M	H	N	M	H	N	M	H
X1NiCrMoCuN25-20-7	1.4529	Würth HCR (0180 904...)	+	+	+	+	+	+	+	+	+	+	+	+
X1NiCrMoCu25-20-5	1.4539	Würth HCR (0180 940...)	x	x	x	x	x	x	x	x	+	x	x	+
X5CrNiMo17-12-2	1.4401/1.4578	Würth A4 (0169 015...)	x	x	x	x	+	+	+	+	(+)	+	+	(+)
X5Cr-Ni18-10	1.4301/1.4567	Würth A2 (0166, 0180, 0181)	+	+	+	+	+	(+)	(+)	(+)	-	+	(+)	-
X6Cr17	1.4006	Many competitors	(+)	(+)	(+)	(+)	-	-	(+)	-	-	-	-	-
Stainless steels for various ambient conditions (www.edelstahl-rostfrei.de, Information Leaflet 828)
N= lowest corrosion load within the respective environment, indicated e.g. by low temperatures and low humidity M= medium corrosion load within the respective environment H= highest corrosion load within the respective environment, e.g. due to continuous high humidity, high ambient temperatures, particularly aggressive air pollution x= meets the requirements in principle, however, cheaper steels may also be sufficient += probably best material choice in terms of corrosion resistance and costs (+)= adequate performance as long as certain precautionary steps are taken. Smooth surfaces and regular cleaning are required in particular -= heavy corrosion expected