PartsTable
Technical Data Sheet
2621-791-03 ✓ Verified by PartsTable
· HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The TAILPIECE AND NUT,UNION is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, seat_type: GASKET, overall_length: 2.250 INCHES NOMINAL IN, connection_type: UNTHREADED INTERNAL PIPE FIRST END, connection_style: SOCKET (PIPE) SECOND END, operating_pressure: 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-082-3951, 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
2621-791-03
NSN: 4730-01-082-3951
FSC: 4730
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
seat_typeGASKET
overall_length2.250 INCHES NOMINAL IN
connection_typeUNTHREADED INTERNAL PIPE FIRST END
connection_styleSOCKET (PIPE) SECOND END
operating_pressure1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
end_connection_typeWELDED
nominal_overall_length1.210 INCHES IN
union_outside_diameter0.250 INCHES NOMINAL IN
media_for_which_designedWATER SINGLE RESPONSE
furnished_items_and_quantity1 TAILPIECE AND 1 UNION
nominal_pipe_size_designation0.250 INCHES IN
NSN4730-01-082-3951
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2621-791-03 · 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
SEAT TYPE: BEVELED
MATERIAL: STEEL COMP 304 TAILPIECE
CONNECTION STYLE: SOCKET (PIPE) FIRST END
CONNECTION TYPE: UNTHREADED EXTERNAL PIPE SECOND END
REDUCER TYPE: CONCENTRIC
NOMINAL PIPE SIZE ACCOMMODATED: 0.250 INCHES FIRST END IN
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CLASS A FED STD 1ST MATERIAL RESPONSE NUT
TECHNICAL CHARACTERISTICS (FLIS)
SEAT TYPEBEVELED
MATERIALSTEEL COMP 304 TAILPIECE
CONNECTION STYLESOCKET (PIPE) FIRST END
CONNECTION TYPEUNTHREADED EXTERNAL PIPE SECOND END
REDUCER TYPECONCENTRIC
NOMINAL PIPE SIZE ACCOMMODATED0.250 INCHES FIRST END IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CLASS A FED STD 1ST MATERIAL RESPONSE NUT
MATERIALNICKEL ALLOY NUT
NOMINAL PIPE SIZE ACCOMMODATED0.250 INCHES SECOND END IN
PIPE WALL THICKNESS DESIGNATION FOR WHICH DESIGNEDSCHEDULE STD ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 1
14-97-0984Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2621-791-03?
2621-791-03 is a TAILPIECE AND NUT,UNION.
What parts can replace 2621-791-03?
There is 1 known substitute for 2621-791-03: 14-97-0984. Substitute compatibility should be verified for your specific system.
What is the NSN for 2621-791-03?
2621-791-03 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-082-3951. This indicates validated use in U.S. government and defense supply chains.
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