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PartsTable / COMPONENT / A-5523
A-5523 ✓ 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 FITTING,LUBRICATION is a the manufacturer industrial component. Key specifications include height: 0.500 INCHES NOMINAL IN, material: STEEL OVERALL, shank_length: 0.125 INCHES NOMINAL IN, thread_class: 2A A, special_features: NO CHECK VALVE, style_designator: STRAIGHT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-639-9684, 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-5523
NSN: 4730-00-639-9684
FSC: 4730
CAGE: 36251 — MCNEIL OHIO CORP (USA)
SPECIFICATIONS
height0.500 INCHES NOMINAL IN
materialSTEEL OVERALL
shank_length0.125 INCHES NOMINAL IN
thread_class2A A
special_featuresNO CHECK VALVE
style_designatorSTRAIGHT
surface_treatmentZINC AND PASSIVATE OVERALL
width_across_flats0.281 INCHES NOMINAL IN
nominal_thread_size0.125 INCHES IN
thread_quantity_per_inch36
screw_thread_series_designatorPTF-SPL SHORT
NSN4730-00-639-9684
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A-5523 · 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
•
STYLE DESIGNATOR: STRAIGHT
•
THREAD CLASS: 2A A
•
WIDTH ACROSS FLATS: 0.281 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.125 INCHES IN
•
THREAD QUANTITY PER INCH: 36
•
HEIGHT: 0.500 INCHES NOMINAL IN
•
SCREW THREAD SERIES DESIGNATOR: PTF-SPL SHORT
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORSTRAIGHT
THREAD CLASS2A A
WIDTH ACROSS FLATS0.281 INCHES NOMINAL IN
SPECIAL FEATURESNO CHECK VALVE
NOMINAL THREAD SIZE0.125 INCHES IN
THREAD QUANTITY PER INCH36
HEIGHT0.500 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORPTF-SPL SHORT
SURFACE TREATMENTZINC AND PASSIVATE OVERALL
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
7417289Interchangeable
interchangeable cross-reference
interchangeable
46604Interchangeable
interchangeable cross-reference
interchangeable
550 1/16Interchangeable
interchangeable cross-reference
interchangeable
300C 1/16Interchangeable
interchangeable cross-reference
interchangeable
10304Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-5523?
A-5523 is a FITTING,LUBRICATION.
What parts can replace A-5523?
There are 5 known substitutes for A-5523: 7417289, 46604, 550 1/16 and 2 more. Substitute compatibility should be verified for your specific system.
Is A-5523 still available?
A-5523 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