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3181082 — EXPANSION JOINT,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3181082: EXPANSION JOINT,PIPE.

The EXPANSION JOINT,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL FLANGE, overall_length: 6.000 INCHES NOMINAL IN, bolt_hole_diameter: 0.781 INCHES NOMINAL IN, end_connection_type: FLANGED, bolt_circle_diameter: 11.750 INCHES NOMINAL IN, flange_outside_diameter: 13.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-078-3837, 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
3181082
NSN: 4730-01-078-3837
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 FLANGE
overall_length6.000 INCHES NOMINAL IN
bolt_hole_diameter0.781 INCHES NOMINAL IN
bolt_hole_quantity8
end_connection_typeFLANGED
bolt_circle_diameter11.750 INCHES NOMINAL IN
flange_outside_diameter13.500 INCHES NOMINAL IN
working_pressure_rating125.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
NSN4730-01-078-3837
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3181082 · 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
•
END CONNECTION TYPE: FLANGED
•
BOLT HOLE DIAMETER: 0.781 INCHES NOMINAL IN
•
WORKING PRESSURE RATING: 125.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
•
BOLT HOLE QUANTITY: 8
•
BOLT CIRCLE DIAMETER: 11.750 INCHES NOMINAL IN
•
MATERIAL: STEEL FLANGE
•
FLANGE OUTSIDE DIAMETER: 13.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
END CONNECTION TYPEFLANGED
BOLT HOLE DIAMETER0.781 INCHES NOMINAL IN
OVERALL LENGTH6.000 INCHES NOMINAL IN
WORKING PRESSURE RATING125.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
BOLT HOLE QUANTITY8
BOLT CIRCLE DIAMETER11.750 INCHES NOMINAL IN
MATERIALSTEEL FLANGE
FLANGE OUTSIDE DIAMETER13.500 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 3
RXJReference document
Same NSN cross-reference
Reference document — Secondary reference
ASTM F1123Reference document
Same NSN cross-reference
Reference document — Secondary reference
ASC1158405Reference document
Same NSN cross-reference
Reference document — Secondary 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 3181082?
3181082 is a EXPANSION JOINT,PIPE.
What parts can replace 3181082?
There are 3 known substitutes for 3181082: RXJ, ASTM F1123, ASC1158405. Substitute compatibility should be verified for your specific system.
What is the NSN for 3181082?
3181082 is cataloged in the U.S. Government catalog under NSN 4730-01-078-3837. 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.