M4 Carbon Steel Blue Coated Screw Bolt Hex Head Fastener for Car

Hex head screw bolts are made from carbon steel with coating instead of normal zinc finishs . coating is specially used for special working conditions like extreme high or low temperature , high requested lubricantion and resistant corrosion etc . coating of screw or bolt is similar with powder coated bolt or screw but different on performance .

Mostly , coated screw or bolt is blue color and green yellow , red , black and white can be made for custom requirements . coated screw is made of carbon steel for the most applications , but stainless steel and aluminum is used for special requests .

Material

Carbon steel with grade 4.8

Optional materials for telfon coated screw bolt like stainless steel , aluminum , brass and titanium etc .

Finish

blue

Dimensions

Mechanical Properties

Final properties data maybe different as dimensions , process and hardening for coated screw

Feature

Leading difference for coated screw compared to normal screws is its coating ,this kind coating with perfect features

1 . Resistant high or low temeperature

coated screw bolt can be worked from 100 degree zero to 260 degree .

2 . Not easy to be loosen

coating is good self lubricant and just 0.4 friction factor .

3 . Resistant corrosion

coating is not mostly dissolved into any chemical solvents .

4 . Not easy to be broken

coated screws are made of carbon steel with good enlongation and ductility .

Tips for use

1 . Do not put coated screw into temeprature over 260 degree .

2 . Not suitable for heavy duty .

3 . Do not scratch coating for long service

Applications

coated screw bolt is used for car , and used for other fields as well like chemical industry , machinery , electronical equipments , building and ocean equipmnets etc .

About customzation

coated screw bolt can be customzied according to your special applications , eg , material , thickness of coating , dimensions , hardness , basic profile of screw and packing etc .

Besides , coated screw , we provide more fasteners with metal and plastic materials for you . eg , different stainless steel screws , various fastener screws , metal stamping parts , custom plastic parts , spacer washers , fastener pins and standard or non-standard bolts nuts .