Shop High Pressure Adapters, Male HP x Female MP

The Medium Pressure Female to High Pressure Male OneXtreme Adapters are precision-engineered conversion fittings designed to connect medium pressure and high pressure coned-and-threaded systems in demanding hydraulic, chemical injection, and test applications. Both connection types utilize a 60-degree cone and thread design to create a reliable metal-to-metal seal, with the medium pressure side typically used in systems up to 20,000 psi (1379 bar) and the high pressure side designed for applications up to 60,000 psi (4136 bar). 


Manufactured from cold worked 316 stainless steel, these adapters provide exceptional strength, corrosion resistance, and durability in harsh and high-cycle environments, with special materials available upon request to meet specific application requirements. Because this adapter bridges two pressure classes, the overall assembly must always be designed around the lower-rated side and system components. 


NOTE: Proper installation, thread compatibility, and torque are critical. Mismatched components, damaged sealing surfaces, or exceeding system limits can result in leaks or catastrophic failure. Always verify compatibility and follow recommended assembly practices before use.

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High Pressure Adapters

Up to 20,000psi (varies by size)

1/4" to 1" 

316 Stainless Steel (Customs available upon Request)

Click HERE to view the OneXtreme Catalog

Click HERE to view the entire High Pressure MHP-FMP Collection

Series 205, Male HP x Female MP

Click on the model number in the chart below to view that adapter. 

ALL ADAPTERS SHOWN BELOW ARE 316 STAINLESS, MADE IN USA.

Product SKU Female MP Side Male HP Side Pressure Rating Lead Time Price
X4MF04H20-K 0.25 (1/4") 0.25 (1/4") 20000 4-6 Weeks $54.98
X4MF06H20-K 0.25 (1/4") 0.75 (3/4") 20000 4-6 Weeks $57.72
X4MF09H20-K 0.25 (1/4") 0.5625 (9/16") 20000 4-6 Weeks $59.69
X6MF04H20-K 0.375 (3/8") 0.25 (1/4") 20000 4-6 Weeks $47.26
X6MF06H20-K 0.375 (3/8") 0.75 (3/4") 20000 4-6 Weeks $57.25
X6MF09H20-K 0.375 (3/8") 0.5625 (9/16") 20000 4-6 Weeks $59.78
X9MF04H20-K 0.5625 (9/16") 0.25 (1/4") 20000 4-6 Weeks $69.37
X9MF09H20-K 0.5625 (9/16") 0.5625 (9/16") 20000 4-6 Weeks $70.26
X12MF04H20-K 0.75 (3/4") 0.25 (1/4") 20000 4-6 Weeks $121.32
X12MF06H20-K 0.75 (3/4") 0.75 (3/4") 20000 4-6 Weeks $134.05
X12MF09H20-K 0.75 (3/4") 0.5625 (9/16") 20000 4-6 Weeks $143.83
X16MF04H20-K 1 0.25 (1/4") 20000 4-6 Weeks $167.32
X16MF06H20-K 1 0.75 (3/4") 20000 4-6 Weeks $167.32
X16MF09H20-K 1 0.5625 (9/16") 20000 4-6 Weeks $175.14
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Technical Specs



Still need help? Give us a call at 281.941.2310 or email us at sales@onehydraulics.com for technical support.