PartsTable
Technical Data Sheet
AN773-4 ✓ 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,TUBE TO HOSE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 OVERALL, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3B FIRST END3B FIRST END, connection_type: THREADED INTERNAL TUBE FIRST ENDTHREADED INTERNAL TUBE FIRST END, connection_style: GRIPPING NIPPLE (NOSE) SECOND ENDGRIPPING NIPPLE (NOSE) SECOND END, surface_treatment: ANODIZE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-497-4281, 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
AN773-4
NSN: 4730-00-497-4281
FSC: 4730
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 OVERALL
seat_angle37.0 DEGREES FIRST END
thread_class3B FIRST END3B FIRST END
connection_typeTHREADED INTERNAL TUBE FIRST ENDTHREADED INTERNAL TUBE FIRST END
connection_styleGRIPPING NIPPLE (NOSE) SECOND ENDGRIPPING NIPPLE (NOSE) SECOND END
surface_treatmentANODIZE OVERALL
operating_pressure200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES FIRST END0.438 INCHES FIRST END IN
nominal_overall_length1.594 INCHES IN
end_item_identificationGRUMMAN A10 AIRCRAFT, 23N SHIP, OHIO CLASS SSN (TRIDENT)GRUMMAN A10 AIRCRAFT, 23N SHIP, OHIO CLASS SSN (TRIDENT)
thread_series_designatorUNF FIRST END
specification/standard_data96906-MS27404 GOVERNMENT STANDARD
NSN4730-00-497-4281
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN773-4 · 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
OPERATING PRESSURE: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SURFACE TREATMENT: ANODIZE OVERALL
SPECIFICATION/STANDARD DATA: 96906-MS27404 GOVERNMENT STANDARD
THREAD SERIES DESIGNATOR: UNF FIRST END
THREAD CLASS: 3B FIRST END3B FIRST END
MATERIAL: ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 OVERALL
FURNISHED ITEMS AND QUANTITY: 1 HOSE COUPLING NUT
CONNECTION STYLE: GRIPPING NIPPLE (NOSE) SECOND ENDGRIPPING NIPPLE (NOSE) SECOND END
TECHNICAL CHARACTERISTICS (FLIS)
OPERATING PRESSURE200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SURFACE TREATMENTANODIZE OVERALL
SPECIFICATION/STANDARD DATA96906-MS27404 GOVERNMENT STANDARD
THREAD SERIES DESIGNATORUNF FIRST END
THREAD CLASS3B FIRST END3B FIRST END
MATERIALALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 OVERALL
FURNISHED ITEMS AND QUANTITY1 HOSE COUPLING NUT
CONNECTION STYLEGRIPPING NIPPLE (NOSE) SECOND ENDGRIPPING NIPPLE (NOSE) SECOND END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6,T851 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/9,T73 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
MS27404-6Interchangeable
interchangeable cross-reference
interchangeable
AN773-6Interchangeable
interchangeable cross-reference
interchangeable
461-6DInterchangeable
interchangeable cross-reference
interchangeable
471-3DInterchangeable
interchangeable cross-reference
interchangeable
56703Interchangeable
interchangeable cross-reference
interchangeable
MS27404D-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN773-4?
AN773-4 is a ADAPTER,STRAIGHT,TUBE TO HOSE.
What parts can replace AN773-4?
There are 23 known substitutes for AN773-4: MS27404-6, AN773-6, 461-6D and 20 more. Substitute compatibility should be verified for your specific system.
Is AN773-4 still available?
AN773-4 is currently cancelled.
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