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3255621 — EXPANSION JOINT,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3255621: EXPANSION JOINT,PIPE.

The EXPANSION JOINT,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING FLANGE, overall_length: 5.125 INCHES NOMINAL IN, surface_treatment: CADMIUM FLANGE, bolt_hole_diameter: 0.625 INCHES NOMINAL IN, end_connection_type: FLANGED, bolt_circle_diameter: 6.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-261-5832, 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
3255621
NSN: 4730-01-261-5832
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING FLANGE
overall_length5.125 INCHES NOMINAL IN
surface_treatmentCADMIUM FLANGE
bolt_hole_diameter0.625 INCHES NOMINAL IN
bolt_hole_quantity4
end_connection_typeFLANGED
bolt_circle_diameter6.000 INCHES NOMINAL IN
flange_outside_diameter7.500 INCHES NOMINAL IN
working_pressure_rating225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
nominal_pipe_size_designation3.000 INCHES IN
NSN4730-01-261-5832
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3255621 · 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 PIPE SIZE DESIGNATION: 3.000 INCHES IN
•
END CONNECTION TYPE: FLANGED
•
BOLT HOLE DIAMETER: 0.625 INCHES NOMINAL IN
•
WORKING PRESSURE RATING: 225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
•
BOLT HOLE QUANTITY: 4
•
BOLT CIRCLE DIAMETER: 6.000 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM FLANGE
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE DESIGNATION3.000 INCHES IN
END CONNECTION TYPEFLANGED
BOLT HOLE DIAMETER0.625 INCHES NOMINAL IN
OVERALL LENGTH5.125 INCHES NOMINAL IN
WORKING PRESSURE RATING225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
BOLT HOLE QUANTITY4
BOLT CIRCLE DIAMETER6.000 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM FLANGE
MATERIALSTEEL CORROSION RESISTING FLANGE
FLANGE OUTSIDE DIAMETER7.500 INCHES NOMINAL IN
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3255621?
3255621 is a EXPANSION JOINT,PIPE.
What is the NSN for 3255621?
3255621 is cataloged in the U.S. Government catalog under NSN 4730-01-261-5832. 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.