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1820640 ✓ 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 SEMICONDUCTOR DEVICE SET is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024, thickness: 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN, bore_diameter: 0.2500 INCHES MINIMUM AND 0.2506 INCHES MAXIMUM IN, outside_diameter: 0.375 INCHES NOMINAL IN, style_designator: PLAIN ROUND, material_document_and_classification: QQ-A-225/6, ALLOY 2024, T4 FED SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-6948, 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
1820640
NSN: 4730-00-277-6948
FSC: 4730
CAGE: 21628 — INDUSTRIAL BELTING AND SUPPLY INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024
thickness0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
bore_diameter0.2500 INCHES MINIMUM AND 0.2506 INCHES MAXIMUM IN
outside_diameter0.375 INCHES NOMINAL IN
style_designatorPLAIN ROUND
material_document_and_classificationQQ-A-225/6, ALLOY 2024, T4 FED SPEC SINGLE MATERIAL RESPONSE
NSN4730-00-277-6948
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1820640 · 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
•
SPECIAL DEFLATOR: NOT INCLUDED
•
THREAD LOCATION: INTERNAL
•
SCREW THREAD DIAMETER: 0.250 INCHES NOMINAL IN
•
SCREW THREAD SERIES DESIGNATOR: NPT
•
HOLDING CLIP: INCLUDED
•
DESIGN TYPE: SINGLE FOOT
•
SHANK TYPE: THREADED
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL DEFLATORNOT INCLUDED
THREAD LOCATIONINTERNAL
SCREW THREAD DIAMETER0.250 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORNPT
HOLDING CLIPINCLUDED
DESIGN TYPESINGLE FOOT
SHANK TYPETHREADED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
10783Interchangeable
interchangeable cross-reference
interchangeable
16450-4Interchangeable
interchangeable cross-reference
interchangeable
47H101-4Interchangeable
interchangeable cross-reference
interchangeable
TZA35128Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-16384TYPE A/EInterchangeable
interchangeable cross-reference
interchangeable
5599Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1820640?
1820640 is a SEMICONDUCTOR DEVICE SET.
What parts can replace 1820640?
There are 19 known substitutes for 1820640: 10783, 16450-4, 47H101-4 and 16 more. Substitute compatibility should be verified for your specific system.
Is 1820640 still available?
1820640 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026