20211 GB Metric Female Flat Seat
Product Description Product name: Metric Barbed Hose Fittings/Metric Flat Seal (20211/20212) 1. Raw Material: Carbon Steel & Stainless S...
Product Description Product name: Metric Barbed Hose Fittings/Metric Flat Seal (20211/20212) 1. Raw Material: Carbon Steel & Stainless S...
1. Raw Material: Carbon Steel & Stainless Steel available 2. Standard Plating: Trivalent Zinc Plating ( Cr3 / Chrome Free ), Silver & Yellow ...
Product Description Product name: 90° Metric Female Flat Seal Hydraulic Hose Fitting (20291, 20291T) 1. Raw Material: Carbon Steel & Stai...
1. Raw Material: Carbon Steel & Stainless Steel available 2. Standard Plating: Trivalent Zinc Plating ( Cr3 / Chrome Free ), Silver & Yellow ...
Product Description Product name: Metric Female 24° Cone O-Ring L. T. Stainless Steel Pipe Fitting (20411) 1. Raw Material: Carbon Steel ...
1. Raw Material: Carbon Steel & Stainless Steel available 2. Standard Plating: Trivalent Zinc Plating ( Cr3 / Chrome Free ), Silver & Yellow ...
1. Raw Material: Carbon Steel & Stainless Steel available 2. Standard Plating: Trivalent Zinc Plating ( Cr3 / Chrome Free ), Silver & Yellow ...
Product Description Product name: Hydraulic Hose Couplings (20491) 1. Raw Material: Carbon Steel & Stainless Steel available 2. Standard P...
1. Raw Material: Carbon Steel & Stainless Steel available 2. Standard Plating: Trivalent Zinc Plating ( Cr3 / Chrome Free ), Silver & Yellow ...
1. Raw Material: Carbon Steel & Stainless Steel available 2. Standard Plating: Trivalent Zinc Plating ( Cr3 / Chrome Free ), Silver & Yellow ...
1. Raw Material: Carbon Steel & Stainless Steel available 2. Standard Plating: Trivalent Zinc Plating ( Cr3 / Chrome Free ), Silver & Yellow ...
1. Raw Material: Carbon Steel & Stainless Steel available 2. Standard Plating: Trivalent Zinc Plating ( Cr3 / Chrome Free ), Silver & Yellow ...
Our 10 years of customisation experience has created the OPK Fitting brand value.




Ihre Hand kennt den Unterschied bereits: Ein JIC-Außengewinde lässt sich problemlos in ein JIC-Innengewinde einschrauben und sitzt mit einer 37°-Bördelung von Metall zu Metall. Versuchen Sie es mit dem gleichen Außengewinde in einen NVV-Anschluss, und es verklebt, leckt oder beschädigt die Gew...
View MoreAngenommen, eine neu gelieferte Schlauchleitung wird drei Umdrehungen lang auf den Pumpenanschluss geschraubt und bleibt dann hängen. Durch etwas mehr Druck entsteht eine Verbindung, die richtig aussieht, aber undicht wird, sobald das System den Betriebsdruck erreicht. Im Außendienst verursach...
View MoreA hydraulic hose bursts on an excavator arm at mid-morning. The spare fitting in the toolbox looks exactly like the damaged one, but it will not thread on. Identifying hydraulic fittings correctly is what separates a 20-minute repair from a half-day hunt for the right adapter. Die meiste...
View MoreA standard hose fitting is a critical connector used in hydraulic systems to securely join hoses with other components such as pumps, valves, and cylinders. These fittings ensure a tight seal and efficient fluid transmission under high pressure, often exceeding 3,000 PSI . A reliable fitting can significantly reduce leakage risks and improve system efficiency by up to 15% .
Standard hose fittings are widely used across industries including construction, agriculture, and manufacturing, where durability and reliability are essential.
Our fittings are available in carbon steel and stainless steel . Carbon steel is suitable for general applications, while stainless steel is ideal for environments requiring high corrosion resistance, such as marine or chemical industries.
We use trivalent zinc plating (Cr3, chrome-free) with silver and yellow finishes. This eco-friendly coating enhances corrosion resistance while meeting environmental standards.
Our fittings pass a salt spray test of over 72 hours , and can reach up to 200 hours upon request, ensuring long-term durability in harsh environments.
Each product is protected with plastic caps and packed in carbon boxes to prevent damage during transportation and storage.
| Material | Corrosion Resistance | Application |
|---|---|---|
| Carbon Steel | Medium | General hydraulic systems |
| Stainless Steel | High | Marine and chemical industries |
About OPK Fitting
OPK FITTING Hydraulic Equipment Factory is a specialized domestic factory with hydraulic pipes and adaptors production experience. Our managing scope relates to various fields such as hydraulic systems etc.; Including all kinds of materials with different pressure levels, flexible hydraulic hoses with various size criteria, hose fitting, adaptor, etc.
They have been respectively applied in the hydraulic and fluid conveyance systems of industries, such as machinery, metallurgy petroleum, construction, ships, space-flight, agriculture, pharmaceutical, food, and so forth.
We provide OEM services where customers only need to provide drawings or samples. In addition, free samples are available to help customers evaluate product quality before mass production.
With proper material selection and maintenance, hose fittings can last 3–5 years or longer depending on working conditions.
Yes, we offer OEM customization based on customer drawings or samples to meet specific application requirements.
Yes, we provide free samples . Please contact our sales team to request samples and evaluate product quality.