PartsTable
Technical Data Sheet
AS4857-03 ✓ 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: COPPER ALLOY OVERALL, leg_length: 0.969 INCHES MINIMUM AND 1.016 INCHES MAXIMUM ALL ENDS IN, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, surface_treatment: CADMIUM OVERALL, nominal_thread_size: 0.375 INCHES ALL ENDS IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-3991, 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
AS4857-03
NSN: 4730-00-278-3991
FSC: 4730
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
leg_length0.969 INCHES MINIMUM AND 1.016 INCHES MAXIMUM ALL ENDS IN
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.375 INCHES ALL ENDS IN
thread_series_designatorANPT ALL ENDS
specification/standard_data88044-AN917 GOVERNMENT STANDARD
surface_treatment_document_and_classificationQQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN4730-00-278-3991
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS4857-03 · 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: 88044-AN917 GOVERNMENT STANDARD
MATERIAL: COPPER ALLOY OVERALL
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
LEG LENGTH: 0.969 INCHES MINIMUM AND 1.016 INCHES MAXIMUM ALL ENDS IN
SURFACE TREATMENT: CADMIUM OVERALL
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NOMINAL THREAD SIZE: 0.375 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
SPECIFICATION/STANDARD DATA88044-AN917 GOVERNMENT STANDARD
MATERIALCOPPER ALLOY OVERALL
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
LEG LENGTH0.969 INCHES MINIMUM AND 1.016 INCHES MAXIMUM ALL ENDS IN
SURFACE TREATMENTCADMIUM OVERALL
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NOMINAL THREAD SIZE0.375 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORANPT ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
AS4842Interchangeable
interchangeable cross-reference
interchangeable
AN917-3JInterchangeable
interchangeable cross-reference
interchangeable
AS4857J03Interchangeable
interchangeable cross-reference
interchangeable
AS4857Interchangeable
interchangeable cross-reference
interchangeable
AN917-8DInterchangeable
interchangeable cross-reference
interchangeable
AS4857D06Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS4857-03?
AS4857-03 is a TEE,PIPE.
What parts can replace AS4857-03?
There are 19 known substitutes for AS4857-03: AS4842, AN917-3J, AS4857J03 and 16 more. Substitute compatibility should be verified for your specific system.
Is AS4857-03 still available?
AS4857-03 is currently cancelled.
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