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MAS12523 ✓ 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

COUPLING ASSEMBLY,QUICK DISCONNE. Key specifications include end_item_identification: PROTECTED TRANSPORT VEHICLE, part_name_assigned_by_controlling_agency: VALVE COUPLING EMERGENCY ASSEMBLY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-604-5064, 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
MAS12523
NSN: 4730-01-604-5064
FSC: 4730
CAGE: U7887 — NP AEROSPACE LIMITED (GBR)
SPECIFICATIONS
end_item_identificationPROTECTED TRANSPORT VEHICLE
part_name_assigned_by_controlling_agencyVALVE COUPLING EMERGENCY ASSEMBLY
NSN4730-01-604-5064
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MAS12523 · 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
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYVALVE COUPLING EMERGENCY ASSEMBLY
END ITEM IDENTIFICATIONPROTECTED TRANSPORT VEHICLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
N-20405-TAInterchangeable
interchangeable cross-reference
interchangeable
11445Interchangeable
interchangeable cross-reference
interchangeable
10002665Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MAS12523?
MAS12523 is a COUPLING ASSEMBLY,QUICK DISCONNE.
What parts can replace MAS12523?
There are 3 known substitutes for MAS12523: N-20405-TA, 11445, 10002665. Substitute compatibility should be verified for your specific system.
What is the NSN for MAS12523?
MAS12523 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-604-5064. 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