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Technical Data Sheet
PartsTable / COMPONENT / M181B-2
M181B-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 COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include color: CLEAR, width: 3.000 INCHES IN, length: 27.000 INCHES IN, material: COPPER ALLOY BRUSH PART, lamp_type: QUARTZ, bonnet_type: INSIDE SCREW. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-098-4494, 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
M181B-2
NSN: 4730-01-098-4494
FSC: 4730
CAGE: 28968 — CIRCOR INSTRUMENTATION TECHNOLOGIES, INC. DBA HOKE GYROLOK (USA)
SPECIFICATIONS
colorCLEAR
width3.000 INCHES IN
length27.000 INCHES IN
materialCOPPER ALLOY BRUSH PART
lamp_typeQUARTZ
bonnet_typeINSIDE SCREW
design_typeVERTICAL
constructionLAMINATED
printer_typeMANUAL
usage_designDARKROOM
carrying_caseNOT PROVIDED
lamp_quantity1
NSN4730-01-098-4494
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M181B-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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
106AInterchangeable
interchangeable cross-reference
interchangeable
EA722Interchangeable
interchangeable cross-reference
interchangeable
590T-1.0Interchangeable
interchangeable cross-reference
interchangeable
B22Interchangeable
interchangeable cross-reference
interchangeable
10086987Interchangeable
interchangeable cross-reference
interchangeable
BEB-A2-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M181B-2?
M181B-2 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace M181B-2?
There are 13 known substitutes for M181B-2: 106A, EA722, 590T-1.0 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M181B-2?
M181B-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-098-4494. 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