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Technical Data Sheet
PartsTable / COMPONENT / M18182-04C
M18182-04C ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The UNION,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_type: GROUND-JOINT, reducer_type: CONCENTRIC, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: SCREWED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-5507, 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
M18182-04C
NSN: 4730-00-277-5507
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
seat_typeGROUND-JOINT
reducer_typeCONCENTRIC
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorSCREWED
operating_pressure2000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.500 INCHES ALL ENDS IN
coupling_flange_shapeHEXAGON
maximum_operating_temp550.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length2.500 INCHES IN
end_item_identificationVA5RIOUS APPLICATION
NSN4730-00-277-5507
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M18182-04C · 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
•
MATERIAL: STEEL OVERALL
•
NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN
•
COUPLING FLANGE SHAPE: HEXAGON
•
OPERATING PRESSURE: 2000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
STYLE DESIGNATOR: SCREWED
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
NOMINAL OVERALL LENGTH: 2.500 INCHES IN
•
MEDIA FOR WHICH DESIGNED: STEAM SECOND RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
COUPLING FLANGE SHAPEHEXAGON
OPERATING PRESSURE2000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
STYLE DESIGNATORSCREWED
THREAD SERIES DESIGNATORNPT ALL ENDS
NOMINAL OVERALL LENGTH2.500 INCHES IN
MEDIA FOR WHICH DESIGNEDSTEAM SECOND RESPONSE
MAXIMUM OPERATING TEMP550.0 FAHRENHEIT SINGLE RESPONSE DEGF
END ITEM IDENTIFICATIONVA5RIOUS APPLICATION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
XS1V3-4Interchangeable
interchangeable cross-reference
interchangeable
MILU18182Interchangeable
interchangeable cross-reference
interchangeable
2241Interchangeable
interchangeable cross-reference
interchangeable
5720 1-4Interchangeable
interchangeable cross-reference
interchangeable
5720Interchangeable
interchangeable cross-reference
interchangeable
3250X4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M18182-04C?
M18182-04C is a UNION,PIPE.
What parts can replace M18182-04C?
There are 22 known substitutes for M18182-04C: XS1V3-4, MILU18182, 2241 and 19 more. Substitute compatibility should be verified for your specific system.
Is M18182-04C still available?
M18182-04C is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026