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PartsTable / COMPONENT / AN773-2
AN773-2 ✓ 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 2014 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 OVERALL, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3B FIRST END, connection_type: THREADED INTERNAL TUBE FIRST END, connection_style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END, surface_treatment: ANODIZE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-5689, 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
AN773-2
NSN: 4730-00-278-5689
FSC: 4730
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 OVERALL
seat_angle37.0 DEGREES FIRST END
thread_class3B FIRST END
connection_typeTHREADED INTERNAL TUBE FIRST END
connection_styleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
surface_treatmentANODIZE OVERALL
operating_pressure1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.312 INCHES FIRST END IN
maximum_operating_temp225.0 FAHRENHEIT FIRST RESPONSE DEGF
nominal_overall_length1.484 INCHES IN
media_for_which_designedOXYGEN, GASEOUS SECOND RESPONSE
thread_series_designatorUNF FIRST END
NSN4730-00-278-5689
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN773-2 · 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
•
NOMINAL OVERALL LENGTH: 1.484 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/4T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/6,T6 OR T851 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/9,T73 FED SPEC 3RD MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: ANODIZE OVERALL
•
NOMINAL THREAD SIZE: 0.312 INCHES FIRST END IN
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.125 INCHES FIRST END IN
•
MEDIA FOR WHICH DESIGNED: OXYGEN, GASEOUS SECOND RESPONSE
•
CONNECTION STYLE: GRIPPING NIPPLE (NOSE) SECOND END
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL OVERALL LENGTH1.484 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/4T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/6,T6 OR T851 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/9,T73 FED SPEC 3RD MATERIAL RESPONSE OVERALL
SURFACE TREATMENTANODIZE OVERALL
NOMINAL THREAD SIZE0.312 INCHES FIRST END IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.125 INCHES FIRST END IN
MEDIA FOR WHICH DESIGNEDOXYGEN, GASEOUS SECOND RESPONSE
CONNECTION STYLEGRIPPING NIPPLE (NOSE) SECOND END
CONNECTION STYLESWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
MATERIALALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 2,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
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 AN773-2?
AN773-2 is a ADAPTER,STRAIGHT,TUBE TO HOSE.
What parts can replace AN773-2?
There are 18 known substitutes for AN773-2: MS27404-6, AN773-6, 461-6D and 15 more. Substitute compatibility should be verified for your specific system.
Is AN773-2 still available?
AN773-2 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