PartsTable
Technical Data Sheet
1779AS159-1 ✓ 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 BUSHING,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304, style_designator: OUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL), surface_treatment: PASSIVATE, external_thread_size: 3/8-18, internal_thread_size: 1/4-18, end_item_identification: 3955-01-281-7747. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-302-3547, 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
1779AS159-1
NSN: 4730-01-302-3547
FSC: 4730
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 304
style_designatorOUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL)
surface_treatmentPASSIVATE
external_thread_size3/8-18
internal_thread_size1/4-18
end_item_identification3955-01-281-7747
external_thread_directionRIGHT-HAND
internal_thread_directionRIGHT-HAND
working_pressure_and_service_type3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OXYGEN LBS
material_document_and_classificationFED STD 66, COMP 304 FED STD SINGLE MATERIAL RESPONSE
external_screw_thread_series_designatorANPT
internal_screw_thread_series_designatorANPT
NSN4730-01-302-3547
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1779AS159-1 · 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
INTERNAL THREAD SIZE: 1/4-18
EXTERNAL THREAD DIRECTION: RIGHT-HAND
INTERNAL SCREW THREAD SERIES DESIGNATOR: ANPT
EXTERNAL SCREW THREAD SERIES DESIGNATOR: ANPT
INTERNAL THREAD DIRECTION: RIGHT-HAND
SURFACE TREATMENT: PASSIVATE
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66, COMP 304 FED STD SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL THREAD SIZE1/4-18
END ITEM IDENTIFICATION3955-01-281-7747
EXTERNAL THREAD DIRECTIONRIGHT-HAND
INTERNAL SCREW THREAD SERIES DESIGNATORANPT
EXTERNAL SCREW THREAD SERIES DESIGNATORANPT
INTERNAL THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTPASSIVATE
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66, COMP 304 FED STD SINGLE MATERIAL RESPONSE
MATERIALSTEEL COMP 304
STYLE DESIGNATOROUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
AN912-2JInterchangeable
interchangeable cross-reference
interchangeable
AS4861J02Interchangeable
interchangeable cross-reference
interchangeable
AN912-5JInterchangeable
interchangeable cross-reference
interchangeable
AN912Interchangeable
interchangeable cross-reference
interchangeable
1551AS656Interchangeable
Same NIIN cross-reference
interchangeable
1551AS656-3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1779AS159-1?
1779AS159-1 is a BUSHING,PIPE.
What parts can replace 1779AS159-1?
There are 6 known substitutes for 1779AS159-1: AN912-2J, AS4861J02, AN912-5J and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1779AS159-1?
1779AS159-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-302-3547. This indicates validated use in U.S. government and defense supply chains.
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