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516-5486653 FN 3 — UNION,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

516-5486653 FN 3: UNION,PIPE.

The UNION,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY TAILPIECE, seat_type: RECESSED, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_overall_length: 6.313 INCHES IN, criticality_code_justification: ZZZY, material_document_and_classification: MIL-C-15726,70-30,SOFT MIL SPEC SINGLE MATERIAL RESPONSE TAILPIECE. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-090-4189, 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
516-5486653 FN 3
NSN: 4730-01-090-4189
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY TAILPIECE
seat_typeRECESSED
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_overall_length6.313 INCHES IN
criticality_code_justificationZZZY
material_document_and_classificationMIL-C-15726,70-30,SOFT MIL SPEC SINGLE MATERIAL RESPONSE TAILPIECE
reference_number_differentiating_characteristicsMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
NSN4730-01-090-4189
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 516-5486653 FN 3 · 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 OVERALL LENGTH: 6.313 INCHES IN
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-15726,70-30,SOFT MIL SPEC SINGLE MATERIAL RESPONSE NUT
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
SEAT TYPE: RECESSED
•
MATERIAL: NICKEL ALLOY NUT
TECHNICAL CHARACTERISTICS
NOMINAL OVERALL LENGTH6.313 INCHES IN
CRITICALITY CODE JUSTIFICATIONZZZY
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-15726,70-30,SOFT MIL SPEC SINGLE MATERIAL RESPONSE NUT
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-15726,70-30,SOFT MIL SPEC SINGLE MATERIAL RESPONSE TAILPIECE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CL A,HOT FINISH FED SPEC SINGLE MATERIAL RESPONSE THREAD PIECE
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SEAT TYPERECESSED
MATERIALNICKEL ALLOY NUT
MATERIALCOPPER ALLOY TAILPIECE
MATERIALCOPPER ALLOY THREAD PIECE
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 9
2621-791-03ASSY46AReference document
Same NSN cross-reference
Reference document — Design control — primary reference
516-5486653 ITEM F3Reference document
Same NSN cross-reference
Reference document — Secondary reference
516-5486653 FN 3L1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2621-791-03ASSY46AL1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
15-97-5383Reference document
Same NSN cross-reference
Reference document — Secondary reference
15-97-5383L1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 516-5486653 FN 3?
516-5486653 FN 3 is a UNION,PIPE.
What parts can replace 516-5486653 FN 3?
There are 9 known substitutes for 516-5486653 FN 3: 2621-791-03ASSY46A, 516-5486653 ITEM F3, 516-5486653 FN 3L1 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 516-5486653 FN 3?
516-5486653 FN 3 is cataloged in the U.S. Government catalog under NSN 4730-01-090-4189. 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.