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AS1738-1D28 — Technical Data Sheet

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— · 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 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
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 19
AS1738-1D12InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
TC039-12AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
C925-3A12InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SAE-AS1730InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AS1730InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AS1732InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
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 19 known substitutes for AS1738-1D28: AS1738-1D12, TC039-12A, C925-3A12 and 16 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 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: October 2026