Countersunk screw with hexagon socket head

Name: Countersunk screw with hexagon socket head
Brand: Würth
SKU: 412248 25

ISO 10642 steel 08.8, zinc flake, silver
SCR-ISO10642-08.8-HS5-(ZFSHL)-M8X25

Art.-no. 412248 25

EAN 4060053565907

All versions

Specification

ISO 10642, steel strength class 8.8, zinc-flake coating, silver (ZFSHL)

Zinc-flake coatings are chrome (VI)-free corrosion protection coatings for commercial vehicle construction, construction machines, agricultural vehicles and equipment, and all other fields that require vehicle construction standard corrosion protection requirements.

Corrosion resistance for ZFSHL is:

Diameter ≥ M6 - 480h*

Diameter ≥ M10 - 720h*

* Guideline values: No base metal corrosion at points without thread in salt spray mist testing according to DIN EN ISO 9227 NSS.

The designation ZFSHL refers to the following corrosion coating:

Zinc-flake coating, with top coat, silver colour, with friction value adjusted lubrication.

Adjusted friction coefficient range from 0.09μ – 0.14μ due to top coat with integrated lubricating particles

Notice

ISO 10642 replaces DIN 7991 | There is some limited similarity (some head heights and head diameters have been changed | nominal Ø M18, M22, M24 are omitted | Stainless steels removed | strength classes 10.9 and 12.9 added).

These screws can only be subjected to limited loads due to their head geometry, see DIN EN ISO 898-1

Technical information


Thread type x nominal diameter (d₁)	M8
Length (l₁)	25 mm
Head diameter (d_k)	16.43 mm
Head height (k₁)	4.96 mm
Internal drive (s₁)	HS5
Standards	ISO 10642
Material	Steel
Property class	08.8
Surface	Flake zinc silver
Corrosion protection period	480 h
RoHS-compliant	Yes
Head type	Countersunk head
Drive type	Hexagon socket
Thread type	Metric thread
Thread form	Standard metric thread
Thread design	Full thread
Product class	A