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Technical Data Sheet
PartsTable / COMPONENT / AN775-4
AN775-4 ✓ 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 RETAINER,SEAL,MEERGENCY EXIT is a the manufacturer industrial component. Key specifications include end_item_identification: AIRCRAFT MODEL C141, general_characteristics_item_description: ALUMINUM ALLOY,AMS4156. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-0375, 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
AN775-4
NSN: 4730-00-278-0375
FSC: 4730
CAGE: 00624 — EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION (USA)
SPECIFICATIONS
end_item_identificationAIRCRAFT MODEL C141
general_characteristics_item_descriptionALUMINUM ALLOY,AMS4156
NSN4730-00-278-0375
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN775-4 · 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
•
SPECIFICATION/STANDARD DATA: 81343-AS4875 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 88044-AN775 GOVERNMENT STANDARD
•
SURFACE TREATMENT: CADMIUM
•
FIRST RADIAL FLUID HOLE DIAMETER: 0.187 INCHES NOMINAL IN
•
LENGTH FROM BEARING SURFACE OF WRENCHING FEATURE TO BOLT END: 1.187 INCHES NOMINAL IN
•
FIRST END CONNECTION TYPE: THREADED EXTERNAL TUBE
•
DISTANCE FROM FIRST RADIAL HOLE CENTER TO END OF BOLT: 0.781 INCHES NOMINAL IN
•
FIRST END THREAD CLASS: 3A A
•
FIRST END NOMINAL THREAD SIZE: 0.437 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
SPECIFICATION/STANDARD DATA81343-AS4875 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 88044-AN775 GOVERNMENT STANDARD
SURFACE TREATMENTCADMIUM
FIRST RADIAL FLUID HOLE DIAMETER0.187 INCHES NOMINAL IN
LENGTH FROM BEARING SURFACE OF WRENCHING FEATURE TO BOLT END1.187 INCHES NOMINAL IN
FIRST END CONNECTION TYPETHREADED EXTERNAL TUBE
DISTANCE FROM FIRST RADIAL HOLE CENTER TO END OF BOLT0.781 INCHES NOMINAL IN
FIRST END THREAD CLASS3A A
FIRST END NOMINAL THREAD SIZE0.437 INCHES IN
FIRST END THREAD SERIES DESIGNATORUNF
MINIMUM TENSILE STRENGTH25000 POUNDS PER SQUARE INCH LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
AS4875Interchangeable
interchangeable cross-reference
interchangeable
AS5161Interchangeable
interchangeable cross-reference
interchangeable
129-561Interchangeable
interchangeable cross-reference
interchangeable
X4-76Interchangeable
interchangeable cross-reference
interchangeable
AS5161-06Interchangeable
interchangeable cross-reference
interchangeable
4730002740936Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN775-4?
AN775-4 is a RETAINER,SEAL,MEERGENCY EXIT.
What parts can replace AN775-4?
There are 18 known substitutes for AN775-4: AS4875, AS5161, 129-561 and 15 more. Substitute compatibility should be verified for your specific system.
Is AN775-4 still available?
AN775-4 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