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AA50431, CLASS OM, SZ 3/4IN — Technical Data Sheet

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— · 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 material: COPPER ALLOY BODY, leg_length: 0.750 INCHES NOMINAL IN, overall_length: 3.500 INCHES NOMINAL IN, connection_type: THREADED EXTERNAL PIPE FIRST FLUID END CONNECTION, connection_style: PLAIN ALL ENDS, style_designator: MALE COUPLING HALF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4730-00-289-4243, 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
AA50431, CLASS OM, SZ 3/4IN
NSN: 4730-00-289-4243
FSC: 4730
CAGE: 58536 — FEDERAL COMMERCIAL ITEM DESCRIPTION PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
leg_length0.750 INCHES NOMINAL IN
overall_length3.500 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL PIPE FIRST FLUID END CONNECTION
connection_stylePLAIN ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.750 INCHES ALL ENDS IN
quick_disconnect_methodTWIST-LOCK ALL ENDS
thread_series_designatorNPT ALL ENDS
nondefinitive_spec/std_dataO.M. CLASS
quick_disconnect_nominal_size1.016 INCHES ALL ENDS IN
nominal_pipe_size_accommodated0.750 INCHES ALL ENDS IN
NSN4730-00-289-4243
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AA50431, CLASS OM, SZ 3/4IN · 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 TYPE: EXTERNAL QUICK DISCONNECT ALL ENDS
•
QUICK DISCONNECT METHOD: TWIST-LOCK ALL ENDS
•
CONNECTION STYLE: PLAIN ALL ENDS
•
NOMINAL PIPE SIZE ACCOMMODATED: 0.750 INCHES ALL ENDS IN
•
MATERIAL: COPPER ALLOY BODY
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
LEG LENGTH: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CONNECTION TYPEEXTERNAL QUICK DISCONNECT ALL ENDS
QUICK DISCONNECT METHODTWIST-LOCK ALL ENDS
CONNECTION STYLEPLAIN ALL ENDS
NOMINAL PIPE SIZE ACCOMMODATED0.750 INCHES ALL ENDS IN
MATERIALCOPPER ALLOY BODY
THREAD SERIES DESIGNATORNPT ALL ENDS
LEG LENGTH0.750 INCHES NOMINAL IN
OVERALL LENGTH3.500 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATAO.M. CLASS
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
MILC3486InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AA50431InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AA50431-OMBZE10InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AA50431, CLASS OF, SIZE 1/2 INCHInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AA50431-OFBZC10InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
75-B-YM-IIInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AA50431, CLASS OM, SZ 3/4IN?
AA50431, CLASS OM, SZ 3/4IN is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace AA50431, CLASS OM, SZ 3/4IN?
There are 15 known substitutes for AA50431, CLASS OM, SZ 3/4IN: MILC3486, AA50431, AA50431-OMBZE10 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AA50431, CLASS OM, SZ 3/4IN?
AA50431, CLASS OM, SZ 3/4IN is cataloged in the Federal Logistics Information System under NSN 4730-00-289-4243. 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: October 2026