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321998-4014 — COUPLING,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

321998-4014: COUPLING,PIPE.

The COUPLING,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, connection_type: THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS, style_designator: THREADED INTERNAL, operating_pressure: 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_thread_size: 2.000 INCHES ALL ENDS2.000 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-293-7565, 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
321998-4014
NSN: 4730-00-293-7565
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 55819 — DIAMOND ELECTRONICS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
connection_typeTHREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS
style_designatorTHREADED INTERNAL
operating_pressure600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size2.000 INCHES ALL ENDS2.000 INCHES ALL ENDS IN
maximum_operating_temp254.0 CELSIUS SINGLE RESPONSE254.0 CELSIUS SINGLE RESPONSE DEGC
nominal_overall_length3.125 INCHES IN
media_for_which_designedSTEAM SINGLE RESPONSE
thread_series_designatorNPT ALL ENDS
NSN4730-00-293-7565
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 321998-4014 · 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
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 3.125 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: THREADED INTERNAL
•
OPERATING PRESSURE: 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
NOMINAL THREAD SIZE: 2.000 INCHES ALL ENDS2.000 INCHES ALL ENDS IN
•
MAXIMUM OPERATING TEMP: 254.0 CELSIUS SINGLE RESPONSE254.0 CELSIUS SINGLE RESPONSE DEGC
•
MEDIA FOR WHICH DESIGNED: STEAM SINGLE RESPONSE
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS
NOMINAL OVERALL LENGTH3.125 INCHES IN
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATORTHREADED INTERNAL
OPERATING PRESSURE600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NOMINAL THREAD SIZE2.000 INCHES ALL ENDS2.000 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP254.0 CELSIUS SINGLE RESPONSE254.0 CELSIUS SINGLE RESPONSE DEGC
MEDIA FOR WHICH DESIGNEDSTEAM SINGLE RESPONSE
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORNPT ALL ENDS
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
321998-1010Reference document
Same NSN cross-reference
Reference document — Secondary reference
N3-19009-356FM1220Reference document
Same NSN cross-reference
Reference document — Secondary 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 321998-4014?
321998-4014 is a COUPLING,PIPE.
What parts can replace 321998-4014?
There are 2 known substitutes for 321998-4014: 321998-1010, N3-19009-356FM1220. Substitute compatibility should be verified for your specific system.
What is the NSN for 321998-4014?
321998-4014 is cataloged in the U.S. Government catalog under NSN 4730-00-293-7565. This indicates validated use in U.S. government and defense supply chains.
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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.