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Technical Data Sheet
PartsTable / COMPONENT / 181-M2X1-1/2
181-M2X1-1/2 ✓ 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 181-M2X1-1/2 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-347-0002, 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
181-M2X1-1/2
NSN: 4730-01-347-0002
FSC: 4730
CAGE: 82666 — STOCKHAM VALVES AND FITTINGS INC (USA)
SPECIFICATIONS
Part Number181-M2X1-1/2
NSN4730-01-347-0002
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 181-M2X1-1/2 · 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
•
INTERNAL THREAD DIRECTION: RIGHT-HAND
•
MATERIAL: IRON CAST
•
STYLE DESIGNATOR: OUTSIDE HEXAGON
•
INTERNAL SCREW THREAD SERIES DESIGNATOR: NPT
•
EXTERNAL SCREW THREAD SERIES DESIGNATOR: NPT
•
EXTERNAL THREAD DIRECTION: RIGHT-HAND
•
EXTERNAL THREAD SIZE: 2-11-1/2
•
INTERNAL THREAD SIZE: 11/2-11-1/2
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL THREAD DIRECTIONRIGHT-HAND
MATERIALIRON CAST
STYLE DESIGNATOROUTSIDE HEXAGON
INTERNAL SCREW THREAD SERIES DESIGNATORNPT
EXTERNAL SCREW THREAD SERIES DESIGNATORNPT
EXTERNAL THREAD DIRECTIONRIGHT-HAND
EXTERNAL THREAD SIZE2-11-1/2
INTERNAL THREAD SIZE11/2-11-1/2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
1105500Interchangeable
interchangeable cross-reference
interchangeable
9F51AAN001Interchangeable
interchangeable cross-reference
interchangeable
1105345Interchangeable
interchangeable cross-reference
interchangeable
1105500OGInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 181-M2X1-1/2?
181-M2X1-1/2 is a 181-M2X1-1/2.
What parts can replace 181-M2X1-1/2?
There are 4 known substitutes for 181-M2X1-1/2: 1105500, 9F51AAN001, 1105345 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 181-M2X1-1/2?
181-M2X1-1/2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-347-0002. 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