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449-3662 — EXPANSION JOINT,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

449-3662: EXPANSION JOINT,PIPE.

The EXPANSION JOINT,PIPE is a the manufacturer industrial component. Key specifications include joint_type: DOUBLE, design_type: BELLOWS, overall_length: 186.0 MILLIMETERS NOMINAL MM, end_item_identification: GENERATOR SET, SHIP SERVICE DIESEL NO. 1 & NO.

2, part_name_assigned_by_controlling_agency: BELLOW AS-EXHAUST. This part is cataloged in the U.S. Government catalog under NSN 4730-01-534-8950, 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
449-3662
NSN: 4730-01-534-8950
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
joint_typeDOUBLE
design_typeBELLOWS
overall_length186.0 MILLIMETERS NOMINAL MM
end_item_identificationGENERATOR SET, SHIP SERVICE DIESEL NO. 1 & NO. 2
part_name_assigned_by_controlling_agencyBELLOW AS-EXHAUST
NSN4730-01-534-8950
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 449-3662 · 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: BELLOWS
•
JOINT TYPE: DOUBLE
TECHNICAL CHARACTERISTICS
DESIGN TYPEBELLOWS
OVERALL LENGTH186.0 MILLIMETERS NOMINAL MM
PART NAME ASSIGNED BY CONTROLLING AGENCYBELLOW AS-EXHAUST
END ITEM IDENTIFICATIONGENERATOR SET, SHIP SERVICE DIESEL NO. 1 & NO. 2
JOINT TYPEDOUBLE
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 1
195-4654Reference 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 449-3662?
449-3662 is a EXPANSION JOINT,PIPE.
What parts can replace 449-3662?
There is 1 known substitute for 449-3662: 195-4654. Substitute compatibility should be verified for your specific system.
What is the NSN for 449-3662?
449-3662 is cataloged in the U.S. Government catalog under NSN 4730-01-534-8950. 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.