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PartsTable / COMPONENT / AS1738-1D28
AS1738-1D28 ✓ 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 NUT ASSEMBLY,TUBE COUPLING is a the manufacturer industrial component. Key specifications include end_item_identification: P-8A AIRCRAFT A, part_name_assigned_by_controlling_agency: COUPLING,RIGID NUT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-517-8688, 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
AS1738-1D28
NSN: 4730-01-517-8688
FSC: 4730
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
end_item_identificationP-8A AIRCRAFT A
part_name_assigned_by_controlling_agencyCOUPLING,RIGID NUT
NSN4730-01-517-8688
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS1738-1D28 · 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
•
SCREW THREAD SERIES DESIGNATOR: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 2B
•
MATERIAL: ALUMINUM ALLOY
•
STYLE DESIGNATOR: NUT ASSEMBLY
•
SPECIFICATION/STANDARD DATA: 81343-AS1730 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH0.644 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORUNF
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2B
SPECIAL FEATURESWASHER INSTALLED
MATERIALALUMINUM ALLOY
STYLE DESIGNATORNUT ASSEMBLY
SPECIFICATION/STANDARD DATA81343-AS1730 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NONDEFINITIVE SPEC/STD DATA1 TYPE
THREAD SIZE1.500-12
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
AS1738-1D12Interchangeable
interchangeable cross-reference
interchangeable
TC039-12AInterchangeable
interchangeable cross-reference
interchangeable
C925-3A12Interchangeable
interchangeable cross-reference
interchangeable
SAE-AS1730Interchangeable
interchangeable cross-reference
interchangeable
AS1730Interchangeable
interchangeable cross-reference
interchangeable
AS1732Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS1738-1D28?
AS1738-1D28 is a NUT ASSEMBLY,TUBE COUPLING.
What parts can replace AS1738-1D28?
There are 20 known substitutes for AS1738-1D28: AS1738-1D12, TC039-12A, C925-3A12 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS1738-1D28?
AS1738-1D28 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-517-8688. 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