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2071390 — EXPANSION JOINT,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2071390: EXPANSION JOINT,PIPE.

The EXPANSION JOINT,PIPE is a the manufacturer industrial component. Key specifications include design_type: CORRUGATED ELEMENT, end_connection_type: FLANGED, end_item_identification: 3512B MARINE AUXILIARY ENGINE, DIESEL, part_name_assigned_by_controlling_agency: BELLOWS ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-517-8773, 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
2071390
NSN: 4730-01-517-8773
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
design_typeCORRUGATED ELEMENT
end_connection_typeFLANGED
end_item_identification3512B MARINE AUXILIARY ENGINE, DIESEL
part_name_assigned_by_controlling_agencyBELLOWS ASSEMBLY
NSN4730-01-517-8773
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2071390 · 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
•
DESIGN TYPE: CORRUGATED ELEMENT
•
END CONNECTION TYPE: FLANGED
TECHNICAL CHARACTERISTICS
DESIGN TYPECORRUGATED ELEMENT
END CONNECTION TYPEFLANGED
PART NAME ASSIGNED BY CONTROLLING AGENCYBELLOWS ASSEMBLY
END ITEM IDENTIFICATION3512B MARINE AUXILIARY ENGINE, DIESEL
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
162-5721Reference document
Same NSN cross-reference
Reference document — Secondary reference
1880469Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2071390?
2071390 is a EXPANSION JOINT,PIPE.
What parts can replace 2071390?
There are 2 known substitutes for 2071390: 162-5721, 1880469. Substitute compatibility should be verified for your specific system.
What is the NSN for 2071390?
2071390 is cataloged in the U.S. Government catalog under NSN 4730-01-517-8773. 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.