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PartsTable / COMPONENT / M18182-46C
M18182-46C ✓ 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 FIRST END, connection_style: PLAIN (PIPE) FIRST END, style_designator: SCREWED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-9228, 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
M18182-46C
NSN: 4730-00-277-9228
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 FIRST END
connection_stylePLAIN (PIPE) FIRST END
style_designatorSCREWED
surface_treatmentCADMIUM OUTSIDE
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.250 INCHES ALL ENDS IN
coupling_flange_shapeHEXAGON
nominal_overall_length2.250 INCHES IN
media_for_which_designedWATER-OIL-GAS SINGLE RESPONSE
NSN4730-00-277-9228
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M18182-46C · 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
•
CONNECTION STYLE: PLAIN (PIPE) SECOND END
•
SURFACE TREATMENT: CADMIUM INSIDE
•
MEDIA FOR WHICH DESIGNED: WATER-OIL-GAS SINGLE RESPONSE
•
COUPLING FLANGE SHAPE: HEXAGON
•
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
•
NOMINAL OVERALL LENGTH: 2.250 INCHES IN
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEPLAIN (PIPE) SECOND END
SURFACE TREATMENTCADMIUM INSIDE
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS SINGLE RESPONSE
COUPLING FLANGE SHAPEHEXAGON
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
SURFACE TREATMENTCADMIUM OUTSIDE
NOMINAL OVERALL LENGTH2.250 INCHES IN
THREAD SERIES DESIGNATORNPT ALL ENDS
MATERIALSTEEL OVERALL
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
5929Interchangeable
interchangeable cross-reference
interchangeable
5-13-9793Interchangeable
interchangeable cross-reference
interchangeable
A2648A36.5HL-AInterchangeable
interchangeable cross-reference
interchangeable
2125-1/4Interchangeable
Same NIIN cross-reference
interchangeable
254HInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M18182-46C?
M18182-46C is a UNION,PIPE.
What parts can replace M18182-46C?
There are 5 known substitutes for M18182-46C: 5929, 5-13-9793, A2648A36.5HL-A and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M18182-46C?
M18182-46C is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-9228. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026