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AN816-4 ✓ 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 BOSS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_angle: 37.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL PIPE SECOND END, connection_style: PLAIN (PIPE) SECOND END, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-187-0840, 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
AN816-4
NSN: 4730-00-187-0840
FSC: 4730
CAGE: 34724 — ACRA AEROSPACE, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_angle37.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL PIPE SECOND END
connection_stylePLAIN (PIPE) SECOND END
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES FIRST END IN
maximum_operating_temp400.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length1.220 INCHES IN
end_item_identification36F MISSILE, AIR LAUNCH CRUISE (ALCM) AGM-86B
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
nondefinitive_spec/std_data2A FIGURE A
NSN4730-00-187-0840
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN816-4 · 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
•
THREAD SERIES DESIGNATOR: ANPT SECOND END
•
NOMINAL THREAD SIZE: 0.125 INCHES SECOND END IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
•
SPECIFICATION/STANDARD DATA: 81343-AS4842/1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 88044-AN816 GOVERNMENT STANDARD AND 81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORANPT SECOND END
THREAD SERIES DESIGNATORANPT SECOND END
NOMINAL THREAD SIZE0.125 INCHES SECOND END IN
END ITEM IDENTIFICATION36F MISSILE, AIR LAUNCH CRUISE (ALCM) AGM-86B
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
SPECIFICATION/STANDARD DATA81343-AS4842/1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 88044-AN816 GOVERNMENT STANDARD AND 81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
CONNECTION STYLEFLARED (TUBE) FIRST END
THREAD CLASS2A FIRST END A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
4372Interchangeable
interchangeable cross-reference
interchangeable
548-8560-002Interchangeable
interchangeable cross-reference
interchangeable
SF1012-2-4Interchangeable
interchangeable cross-reference
interchangeable
55945Interchangeable
interchangeable cross-reference
interchangeable
2021-2-4SInterchangeable
interchangeable cross-reference
interchangeable
9549Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN816-4?
AN816-4 is a ADAPTER,STRAIGHT,PIPE TO BOSS.
What parts can replace AN816-4?
There are 29 known substitutes for AN816-4: 4372, 548-8560-002, SF1012-2-4 and 26 more. Substitute compatibility should be verified for your specific system.
Is AN816-4 still available?
AN816-4 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