PartsTable
Technical Data Sheet
AN818-6 ✓ 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,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A FIRST END A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: FLARED (TUBE) FIRST END, nominal_thread_size: 0.250 INCHES SECOND END IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-203-3831, 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
AN818-6
NSN: 4730-00-203-3831
FSC: 4730
CAGE: 72599 — ALLIEDSIGNAL INC DBA ALLIED-SIGNAL AEROSPACE CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_angle37.0 DEGREES FIRST END
thread_class3A FIRST END A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_styleFLARED (TUBE) FIRST END
nominal_thread_size0.250 INCHES SECOND END IN
nominal_overall_length1.375 INCHES IN
end_item_identification25F AIRCRAFT, AWACS, E-3A A
thread_series_designatorNPTF SECOND END
specification/standard_data81343-AS4842/1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 88044-AN816 GOVERNMENT STANDARD AND 81349-MIL-F-5509 GOVERNMENT SPECIFICATION
furnished_items_and_quantity1 PREFORMED PACKING
nominal_outside_diameter_tube_accommodated0.250 INCHES FIRST END IN
NSN4730-00-203-3831
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN818-6 · 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 22
3186Interchangeable
interchangeable cross-reference
interchangeable
47926Interchangeable
interchangeable cross-reference
interchangeable
50624X0.312Interchangeable
interchangeable cross-reference
interchangeable
MS16536-153Interchangeable
interchangeable cross-reference
interchangeable
46513Interchangeable
interchangeable cross-reference
interchangeable
GB1616X0HInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN818-6?
AN818-6 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace AN818-6?
There are 22 known substitutes for AN818-6: 3186, 47926, 50624X0.312 and 19 more. Substitute compatibility should be verified for your specific system.
Is AN818-6 still available?
AN818-6 is currently cancelled.
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