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UC-251-6MP — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

UC-251-6MP: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, overall_length: 2.25 INCHES NOMINAL IN, connection_type: THREADED EXTERNAL PIPE SECOND FLUID END CONNECTION, connection_style: PLAIN SECOND FLUID END CONNECTION, style_designator: FEMALE COUPLING HALF, operating_pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-668-8891, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
UC-251-6MP
NSN: 4730-01-668-8891
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 30780 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV TUBE FITTINGS DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
overall_length2.25 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL PIPE SECOND FLUID END CONNECTION
connection_stylePLAIN SECOND FLUID END CONNECTION
style_designatorFEMALE COUPLING HALF
operating_pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.375 INCHES SECOND FLUID END CONNECTION IN
end_item_identification3930-01-641-7505
media_for_which_designedAIR SINGLE RESPONSE
thread_quantity_per_inch18 SECOND FLUID END CONNECTION
thread_series_designatorNPT SECOND FLUID END CONNECTION
nominal_width_across_flats0.81 INCHES IN
NSN4730-01-668-8891
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: UC-251-6MP · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NOMINAL WIDTH ACROSS FLATS: 0.81 INCHES IN
•
NOMINAL PIPE SIZE ACCOMMODATED: 0.375 INCHES SECOND FLUID END CONNECTION IN
•
CONNECTION STYLE: EXTERNAL PLUNGER TYPE FIRST QUICK DISCONNECT END
•
CONNECTION TYPE: THREADED EXTERNAL PIPE SECOND FLUID END CONNECTION
•
STYLE DESIGNATOR: FEMALE COUPLING HALF
TECHNICAL CHARACTERISTICS
NOMINAL WIDTH ACROSS FLATS0.81 INCHES IN
NOMINAL PIPE SIZE ACCOMMODATED0.375 INCHES SECOND FLUID END CONNECTION IN
CONNECTION STYLEEXTERNAL PLUNGER TYPE FIRST QUICK DISCONNECT END
CONNECTION STYLEPLAIN SECOND FLUID END CONNECTION
CONNECTION TYPETHREADED EXTERNAL PIPE SECOND FLUID END CONNECTION
CONNECTION TYPEINTERNAL QUICK DISCONNECT FIRST QUICK DISCONNECT END
STYLE DESIGNATORFEMALE COUPLING HALF
OVERALL LENGTH2.25 INCHES NOMINAL IN
OPERATING PRESSURE150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
QUICK DISCONNECT NOMINAL SIZE0.25 INCHES FIRST QUICK DISCONNECT END IN
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
3821287Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is UC-251-6MP?
UC-251-6MP is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace UC-251-6MP?
There is 1 known substitute for UC-251-6MP: 3821287. Substitute compatibility should be verified for your specific system.
What is the NSN for UC-251-6MP?
UC-251-6MP is cataloged in the U.S. Government catalog under NSN 4730-01-668-8891. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.