Head Nozzle Bolts and nuts

Brief introduction： Head, Nozzle Basic parameters： Material: SKD61、38CrMoAL、42CrMo Process: Inner bore Chrome plating, gas nitriding, quenching, inner bore coating Type: Pneumatic needle-type shut off nozzle/hydraulic hybrid shut off nozzle/static mixing nozzle  Filter hole diameter: 0.8mm minimally  Inner hole finish Ra       : 0.2≤Ra≤0.4 (special order is needed for Ra below 0.2) Scope of application： Composition and process：