ZTH96
Yes
Yes
Electro-plated
zinc + heavy
Cr3 chromate
Iridescent
96 to white corrosion
240 to red rust
No
Yes
Electro-plated
zinc + yellow
Cr6 chromate
Yellow
72 to white corrosion
144 to red rust
ZC6
GC6
SZ6
RoHS
Compliant
Potential for
hydrogen
embrittlement
Finish
Description
Colour
Corrosion
resistance
(salt spray hours)
Finish Code
(Suffix)
Yes
Yes
Electro-plated
zinc + clear
Cr3 chromate
Silver grey
to shiny grey
12 to white corrosion
96 to red rust
ZI
GZ
SZ
Yes
Yes
Electro-plated
zinc + blue
Cr3 chromate
Silver with
blue tinge
48 to white corrosion
120 to red rust
ZTBL48
Yes
Yes
Electro-plated
zinc + Cr3
chromate + sealant
Silver
96 to white corrosion
384 to red rust
ZTS96
Yes
Yes
Electro-plated
zinc + black
Cr3 chromate
Black
120 to white corrosion
240 to red rust
ZTBK120
Yes
Yes
Electro-plated
nickel + clear
Cr3 chromate
Matt silver
360 to white corrosion
600 to red rust
ZNTC360
Yes
Yes
Electro-plated
zinc iron + black
Cr3 chromate
Black
240 to white corrosion
480 to red rust
ZITB240
Yes
Yes
Electro-plated
tin
Shiny to
dull silver
N/A
ET
Yes
No
Mechanical
zinc + heavy
Cr3 chromate
Iridescent
48 to white corrosion
120 to red rust
MZTH
Yes
No
Molybdenum
disulphide
dry film lubricant
Dark grey
Variable
MD
No
No
Dacromet®
Metallic silver
240 to white corrosion
480 to red rust
Dacromet
Yes
No
Geomet®
Silver grey
240 to white corrosion
720 to red rust
Geomet
Yes
No
Deltatone®
+ sealant
Silver grey
240 to white corrosion
480 to red rust
DeltaTS
Yes
No
Deltaprotect®
Silver grey
840 to red rust
DeltaP
Type
ZI, GZ and SZ suffixes are our standard electro-plated zinc finishes on our stocked range of fasteners.
Other finishes are available to suit your specific requirements.
About the potential for hydrogen embrittlement
All components, which are subjected to electro-plating, may absorb hydrogen that is evolved during the plating
processes.
The absorption of hydrogen could potentially lead to a premature failure of the component due to hydrogen
embrittlement.
Components manufactured from carbon steel that are case or through-hardened are most at risk and as a
precaution we bake our fasteners to industry standards to minimise the risk of failure. However, we cannot fully
guarantee every component against hydrogen embrittlement problems in service.
In safety critical situations the only way we can guarantee the performance of hardened carbon steel parts is to
provide the part either self-colour or with a mechanically applied or dipped finish.
For property class 12.9 and above fasteners we highly recommend that parts are supplied with a mechanically
applied or dipped finish.
Give us a call to discuss alternative finishes where extra corrosion protection is required or if you are worried
about possible hydrogen embrittlement problems.
NORTHERN PRECISION LTD
Specialist Fasteners
for Sheet Metal
+44 (0) 1302 836010
+44 (0) 1302 831555
Tel:
Fax:
sales@npfasteners.com
Contact us
You can contact us using any
of the methods below.
Unit 3 Durham Lane
Armthorpe
Doncaster
South Yorkshire DN3 3FE
England
+44 (0)1302 836010
+44 (0)1302 831555
sales@npfasteners.com
All rights reserved
© Northern Precision Ltd.
NORTHERN PRECISION LTD
Accreditations
Northern Precision Ltd operate a quality management
system in accordance with ISO 9001.
The ISO 9001 standard is recognised worldwide and
you can be assured of the benefits of working with a
certified company knowing that our management
systems are constantly assessed and approved.
Regulatory
RoHS|WEEE Compliance
REACH Compliance
Conflict Minerals Policy
Environmental Policy
Opening Hours
Mon - Fri 08:00 - 17:00
Registered in England & Wales
Company number 3275391
V.A.T Registration number
GB 684 1384 17
PLATING SPECIFICATIONS
