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594-6985103-F221 — UNION,PIPE TO TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

594-6985103-F221: UNION,PIPE TO TUBE.

The UNION,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, thread_class: 2A SECOND END A, connection_type: THREADED EXTERNAL TUBE SECOND END, connection_style: SOCKET (TUBE) FIRST END, nominal_thread_size: 0.750 INCHES SECOND END IN, thread_quantity_per_inch: 16 SECOND END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-620-8335, 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
594-6985103-F221
NSN: 4730-01-620-8335
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
thread_class2A SECOND END A
connection_typeTHREADED EXTERNAL TUBE SECOND END
connection_styleSOCKET (TUBE) FIRST END
nominal_thread_size0.750 INCHES SECOND END IN
thread_quantity_per_inch16 SECOND END
thread_series_designatorUNF SECOND END
nominal_pipe_size_accommodated0.250 INCHES FIRST END IN
part_name_assigned_by_controlling_agencyADAPTER ASSEMBLY,FEMALE UNION STRAIGHT
nominal_outside_diameter_tube_accommodated0.750 INCHES SECOND END IN
NSN4730-01-620-8335
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 594-6985103-F221 · 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 PIPE SIZE ACCOMMODATED: 0.250 INCHES FIRST END IN
•
CONNECTION STYLE: PLAIN (TUBE) SECOND END
•
CONNECTION TYPE: UNTHREADED INTERNAL PIPE FIRST END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES SECOND END IN
•
NOMINAL THREAD SIZE: 0.750 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE ACCOMMODATED0.250 INCHES FIRST END IN
CONNECTION STYLEPLAIN (TUBE) SECOND END
CONNECTION STYLESOCKET (TUBE) FIRST END
CONNECTION TYPEUNTHREADED INTERNAL PIPE FIRST END
CONNECTION TYPETHREADED EXTERNAL TUBE SECOND END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES SECOND END IN
NOMINAL THREAD SIZE0.750 INCHES SECOND END IN
PART NAME ASSIGNED BY CONTROLLING AGENCYADAPTER ASSEMBLY,FEMALE UNION STRAIGHT
THREAD CLASS2A SECOND END A
THREAD QUANTITY PER INCH16 SECOND END
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 2
H521-1901-F221Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
DF330799 ASSY 98Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 594-6985103-F221?
594-6985103-F221 is a UNION,PIPE TO TUBE.
What parts can replace 594-6985103-F221?
There are 2 known substitutes for 594-6985103-F221: H521-1901-F221, DF330799 ASSY 98. Substitute compatibility should be verified for your specific system.
What is the NSN for 594-6985103-F221?
594-6985103-F221 is cataloged in the U.S. Government catalog under NSN 4730-01-620-8335. This indicates validated use in U.S. government and defense supply chains.
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