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5598320-1 — COUPLING ASSEMBLY,QUICK DISCONNE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

5598320-1: COUPLING ASSEMBLY,QUICK DISCONNE.

COUPLING ASSEMBLY,QUICK DISCONNE. Key specifications include material: STEEL OVERALL, thread_class: 2B FIRST FLUID END CONNECTION, overall_length: 4.390 INCHES NOMINAL IN, connection_type: THREADED INTERNAL BOSS FIRST FLUID END CONNECTION, connection_style: BOSS GASKET SEAL FIRST FLUID END CONNECTION, special_features: SECOND FLUID END CONNECTION IS TAILPIECE COMPONENT OF FEMALE UNION M1183/10-15R7 PER MIL-F-1183. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-394-0588, 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
5598320-1
NSN: 4730-01-394-0588
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2B FIRST FLUID END CONNECTION
overall_length4.390 INCHES NOMINAL IN
connection_typeTHREADED INTERNAL BOSS FIRST FLUID END CONNECTION
connection_styleBOSS GASKET SEAL FIRST FLUID END CONNECTION
special_featuresSECOND FLUID END CONNECTION IS TAILPIECE COMPONENT OF FEMALE UNION M1183/10-15R7 PER MIL-F-1183
style_designatorCOUPLING ASSEMBLY
surface_treatmentPASSIVATE OVERALL
operating_pressure250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size1.625 INCHES FIRST FLUID END CONNECTION IN
quick_disconnect_methodPUSH-PULL ALL ENDS
thread_quantity_per_inch12 FIRST FLUID END CONNECTION
NSN4730-01-394-0588
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 5598320-1 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35,TY 1,2 OR 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CONNECTION STYLE: BOSS GASKET SEAL FIRST FLUID END CONNECTION
•
CONNECTION TYPE: THREADED INTERNAL BOSS FIRST FLUID END CONNECTION
•
STYLE DESIGNATOR: COUPLING ASSEMBLY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OPERATING PRESSURE: 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
QUICK DISCONNECT NOMINAL SIZE: 1.250 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35,TY 1,2 OR 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEBOSS GASKET SEAL FIRST FLUID END CONNECTION
CONNECTION TYPETHREADED INTERNAL BOSS FIRST FLUID END CONNECTION
STYLE DESIGNATORCOUPLING ASSEMBLY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH4.390 INCHES NOMINAL IN
OPERATING PRESSURE250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
QUICK DISCONNECT NOMINAL SIZE1.250 INCHES ALL ENDS IN
NOMINAL THREAD SIZE1.625 INCHES FIRST FLUID END CONNECTION IN
SPECIAL FEATURESSECOND FLUID END CONNECTION IS TAILPIECE COMPONENT OF FEMALE UNION M1183/10-15R7 PER MIL-F-1183
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
FD01-1000-20-20Reference document
Same NSN cross-reference
Reference document — Secondary reference
5598320Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5598320-1?
5598320-1 is a COUPLING ASSEMBLY,QUICK DISCONNE.
What parts can replace 5598320-1?
There are 2 known substitutes for 5598320-1: FD01-1000-20-20, 5598320. Substitute compatibility should be verified for your specific system.
What is the NSN for 5598320-1?
5598320-1 is cataloged in the U.S. Government catalog under NSN 4730-01-394-0588. 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.