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PartsTable / COMPONENT / AN817-4J
AN817-4J ✓ 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 ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, nut_style: TUBE COUPLING, nut_height: 1.000 INCHES NOMINAL IN, seat_angle: 33.0 DEGREES NOMINAL, thread_class: 3B, thread_series: UNF. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-178-6465, 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
AN817-4J
NSN: 4730-01-178-6465
FSC: 4730
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
nut_styleTUBE COUPLING
nut_height1.000 INCHES NOMINAL IN
seat_angle33.0 DEGREES NOMINAL
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
fabrication_methodMACHINED
width_across_flats0.563 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
smallest_inside_diameter0.255 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN
NSN4730-01-178-6465
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN817-4J · 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
•
WIDTH ACROSS FLATS: 0.563 INCHES NOMINAL IN
•
FABRICATION METHOD: MACHINED
•
THREAD SERIES: UNF
•
SMALLEST INSIDE DIAMETER: 0.255 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN
•
SEAT ANGLE: 33.0 DEGREES NOMINAL
•
NOMINAL TUBE OUTSIDE DIAMETER: 0.250 INCHES IN
•
THREAD QUANTITY PER INCH: 20
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.563 INCHES NOMINAL IN
FABRICATION METHODMACHINED
THREAD SERIESUNF
SMALLEST INSIDE DIAMETER0.255 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN
SEAT ANGLE33.0 DEGREES NOMINAL
NOMINAL TUBE OUTSIDE DIAMETER0.250 INCHES IN
THREAD QUANTITY PER INCH20
NOMINAL THREAD SIZE0.438 INCHES IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 304 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
AS5206-12Interchangeable
interchangeable cross-reference
interchangeable
AS5206Interchangeable
interchangeable cross-reference
interchangeable
SAE-AS4841Interchangeable
interchangeable cross-reference
interchangeable
AN817-10DInterchangeable
interchangeable cross-reference
interchangeable
AN817-12DInterchangeable
interchangeable cross-reference
interchangeable
AS4841Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN817-4J?
AN817-4J is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace AN817-4J?
There are 12 known substitutes for AN817-4J: AS5206-12, AS5206, SAE-AS4841 and 9 more. Substitute compatibility should be verified for your specific system.
Is AN817-4J still available?
AN817-4J 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