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T678498 — EXPANSION JOINT,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

T678498: EXPANSION JOINT,PIPE.

The EXPANSION JOINT,PIPE is a the manufacturer industrial component. Key specifications include guide_type: SEMIGUIDED, joint_type: SINGLE, design_type: SLIP, end_connection_type: FLANGED. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-281-8043, 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
T678498
NSN: 4730-01-281-8043
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 82796 — COLTEC INDUSTRIES INC. DBA FAIRBANKS MORSE ENGINE DIV FAIRBANKS MORSE ENGINE (USA)
SPECIFICATIONS
guide_typeSEMIGUIDED
joint_typeSINGLE
design_typeSLIP
sleeve_quantity2
end_connection_typeFLANGED
NSN4730-01-281-8043
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: T678498 · 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: SLIP
•
END CONNECTION TYPE: FLANGED
•
GUIDE TYPE: SEMIGUIDED
•
JOINT TYPE: SINGLE
•
SLEEVE QUANTITY: 2
TECHNICAL CHARACTERISTICS
DESIGN TYPESLIP
END CONNECTION TYPEFLANGED
GUIDE TYPESEMIGUIDED
JOINT TYPESINGLE
SLEEVE QUANTITY2
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
12997072Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is T678498?
T678498 is a EXPANSION JOINT,PIPE.
What parts can replace T678498?
There is 1 known substitute for T678498: 12997072. Substitute compatibility should be verified for your specific system.
What is the NSN for T678498?
T678498 is cataloged in the U.S. Government catalog under NSN 4730-01-281-8043. This indicates validated use in U.S. government and defense supply chains.
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