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AS4857S02 ✓ 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 TEE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 347 OVERALL, leg_length: 1.781 INCHES MINIMUM AND 1.781 INCHES MINIMUM AND 1.875 INCHES MAXIMUM ALL ENDS1.875 INCHES MAXIMUM ALL ENDS IN, connection_type: THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS, surface_treatment: PASSIVATE OVERALL, operating_pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-432-9638, 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
AS4857S02
NSN: 4730-00-432-9638
FSC: 4730
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 347 OVERALL
leg_length1.781 INCHES MINIMUM AND 1.781 INCHES MINIMUM AND 1.875 INCHES MAXIMUM ALL ENDS1.875 INCHES MAXIMUM ALL ENDS IN
connection_typeTHREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS
surface_treatmentPASSIVATE OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.250 INCHES ALL ENDS0.250 INCHES ALL ENDS IN
maximum_operating_temp225.0 FAHRENHEIT FIRST RESPONSE225.0 FAHRENHEIT FIRST RESPONSE DEGF
end_item_identificationAIRCRAFT APPLICATIONAIRCRAFT APPLICATION
media_for_which_designedOXYGEN, GASEOUS SECOND RESPONSEFLUID FIRST RESPONSE
thread_series_designatorANPT ALL ENDS
specification/standard_data88044-AN917 GOVERNMENT STANDARD
NSN4730-00-432-9638
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS4857S02 · 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
•
MEDIA FOR WHICH DESIGNED: OXYGEN, GASEOUS SECOND RESPONSEFLUID FIRST RESPONSE
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS
•
SPECIFICATION/STANDARD DATA: 88044-AN917 GOVERNMENT STANDARD
•
LEG LENGTH: 1.781 INCHES MINIMUM AND 1.781 INCHES MINIMUM AND 1.875 INCHES MAXIMUM ALL ENDS1.875 INCHES MAXIMUM ALL ENDS IN
•
MAXIMUM OPERATING TEMP: -65.0 FAHRENHEIT SECOND RESPONSE-65.0 FAHRENHEIT SECOND RESPONSE DEGF
•
MATERIAL: STEEL COMP 347 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MEDIA FOR WHICH DESIGNEDOXYGEN, GASEOUS SECOND RESPONSEFLUID FIRST RESPONSE
CONNECTION STYLEPLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS
END ITEM IDENTIFICATIONAIRCRAFT APPLICATIONAIRCRAFT APPLICATION
SPECIFICATION/STANDARD DATA88044-AN917 GOVERNMENT STANDARD
LEG LENGTH1.781 INCHES MINIMUM AND 1.781 INCHES MINIMUM AND 1.875 INCHES MAXIMUM ALL ENDS1.875 INCHES MAXIMUM ALL ENDS IN
MAXIMUM OPERATING TEMP-65.0 FAHRENHEIT SECOND RESPONSE-65.0 FAHRENHEIT SECOND RESPONSE DEGF
MEDIA FOR WHICH DESIGNEDOXYGEN, GASEOUS SECOND RESPONSE
MATERIALSTEEL COMP 347 OVERALL
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS0.250 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORANPT ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
4730005412745Interchangeable
interchangeable cross-reference
interchangeable
AN917-2JInterchangeable
interchangeable cross-reference
interchangeable
AN917-2CInterchangeable
interchangeable cross-reference
interchangeable
AN917-2SInterchangeable
Same NIIN cross-reference
interchangeable
AS4842Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS4857S02?
AS4857S02 is a TEE,PIPE.
What parts can replace AS4857S02?
There are 5 known substitutes for AS4857S02: 4730005412745, AN917-2J, AN917-2C and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS4857S02?
AS4857S02 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-432-9638. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026