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Technical Data Sheet
PartsTable / COMPONENT / A-A-50431 H.F. 5/8IN
A-A-50431 H.F. 5/8IN ✓ 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 A-A-50431 H.F. 5/8IN 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 4730-00-289-4241, 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
A-A-50431 H.F. 5/8IN
NSN: 4730-00-289-4241
FSC: 4730
CAGE: 58536 — FEDERAL COMMERCIAL ITEM DESCRIPTION PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
Part NumberA-A-50431 H.F. 5/8IN
NSN4730-00-289-4241
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A-A-50431 H.F. 5/8IN · 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
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.625 INCHES ALL ENDS IN
•
QUICK DISCONNECT NOMINAL SIZE: 0.781 INCHES ALL ENDS IN
•
CONNECTION TYPE: UNTHREADED EXTERNAL HOSE FIRST FLUID END CONNECTION
•
MATERIAL: COPPER ALLOY BODY
•
NONDEFINITIVE SPEC/STD DATA: H.F. CLASS
•
LEG LENGTH: 1.906 INCHES NOMINAL IN
•
CONNECTION STYLE: BARBED OR SERRATED END ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.625 INCHES ALL ENDS IN
QUICK DISCONNECT NOMINAL SIZE0.781 INCHES ALL ENDS IN
CONNECTION TYPEUNTHREADED EXTERNAL HOSE FIRST FLUID END CONNECTION
MATERIALCOPPER ALLOY BODY
NONDEFINITIVE SPEC/STD DATAH.F. CLASS
LEG LENGTH1.906 INCHES NOMINAL IN
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDS
CONNECTION STYLEBARBED OR SERRATED END ALL ENDS
QUICK DISCONNECT METHODTWIST-LOCK ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
MILC3486Interchangeable
interchangeable cross-reference
interchangeable
AA50431Interchangeable
interchangeable cross-reference
interchangeable
AA50431-OMBZE10Interchangeable
interchangeable cross-reference
interchangeable
AA50431, CLASS OF, SIZE 1/2 INCHInterchangeable
interchangeable cross-reference
interchangeable
AA50431-OFBZC10Interchangeable
interchangeable cross-reference
interchangeable
75-B-YM-IIInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-A-50431 H.F. 5/8IN?
A-A-50431 H.F. 5/8IN is a A-A-50431 H.F. 5/8IN.
What parts can replace A-A-50431 H.F. 5/8IN?
There are 15 known substitutes for A-A-50431 H.F. 5/8IN: MILC3486, AA50431, AA50431-OMBZE10 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A-A-50431 H.F. 5/8IN?
A-A-50431 H.F. 5/8IN is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-289-4241. 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