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154-4IN — UNION,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

154-4IN: UNION,PIPE.

The UNION,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_type: GROOVED, reducer_type: CONCENTRIC, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: FLANGED. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-018-0516, 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
154-4IN
NSN: 4730-01-018-0516
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78824 — TUBE TURNS TECHNOLOGIES INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_typeGROOVED
reducer_typeCONCENTRIC
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorFLANGED
operating_pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size4.000 INCHES ALL ENDS IN
coupling_flange_shapeROUND
nominal_overall_length10.000 INCHES IN
media_for_which_designedSTEAM SINGLE RESPONSE
thread_series_designatorNPTF ALL ENDS
NSN4730-01-018-0516
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 154-4IN · 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 ENDS
•
COUPLING FLANGE SHAPE: ROUND
•
NOMINAL OVERALL LENGTH: 10.000 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: FLANGED
•
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
SEAT TYPE: GROOVED
•
NOMINAL THREAD SIZE: 4.000 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
COUPLING FLANGE SHAPEROUND
NOMINAL OVERALL LENGTH10.000 INCHES IN
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATORFLANGED
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SEAT TYPEGROOVED
NOMINAL THREAD SIZE4.000 INCHES ALL ENDS IN
MEDIA FOR WHICH DESIGNEDSTEAM SINGLE RESPONSE
MATERIALSTEEL OVERALL
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 154-4IN?
154-4IN is a UNION,PIPE.
What is the NSN for 154-4IN?
154-4IN is cataloged in the U.S. Government catalog under NSN 4730-01-018-0516. 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.