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A-A-59949 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: PLASTIC, major_diameter: 0.625 INCHES NOMINAL IN, minor_diameter: 0.4375 INCHES NOMINAL IN, nominal_overall_length: 2.0 INCHES IN, nominal_outside_diameter_tube_accommodated: 0.625 INCHES IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-289-0593, 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-59949
NSN: 4730-00-289-0593
FSC: 4730
CAGE: 58536 — FEDERAL COMMERCIAL ITEM DESCRIPTION PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialPLASTIC
major_diameter0.625 INCHES NOMINAL IN
minor_diameter0.4375 INCHES NOMINAL IN
nominal_overall_length2.0 INCHES IN
nominal_outside_diameter_tube_accommodated0.625 INCHES IN
NSN4730-00-289-0593
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A-A-59949 · 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 32
40504Interchangeable
interchangeable cross-reference
interchangeable
MIL-P-15742-5/8INInterchangeable
interchangeable cross-reference
interchangeable
MILP15742Interchangeable
interchangeable cross-reference
interchangeable
DLGN3034Interchangeable
interchangeable cross-reference
interchangeable
19-674-733PGInterchangeable
interchangeable cross-reference
interchangeable
1581E4PCTPInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-A-59949?
A-A-59949 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace A-A-59949?
There are 32 known substitutes for A-A-59949: 40504, MIL-P-15742-5/8IN, MILP15742 and 29 more. Substitute compatibility should be verified for your specific system.
Is A-A-59949 still available?
A-A-59949 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026