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Technical Data Sheet
PartsTable / COMPONENT / M83798/3-20
M83798/3-20 ✓ 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 M83798/3-20 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-652-4626, 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
M83798/3-20
NSN: 4730-00-652-4626
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM83798/3-20
NSN4730-00-652-4626
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M83798/3-20 · 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
•
NOMINAL THREAD SIZE: 1.625 INCHES FIRST END IN
•
CONNECTION TYPE: THREADED INTERNAL TUBE FIRST END
•
FURNISHED ITEMS AND QUANTITY: 1 HOSE COUPLING NUT
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT (UNJ) FIRST END
•
SPECIFICATION/STANDARD DATA: 81349--83798/3-20 GOVERNMENT SPECIFICATION
•
MATERIAL: ALUMINUM ALLOY 5052 AND ALUMINUM ALLOY 6061 OVERALL
•
SURFACE TREATMENT: ANODIZE OUTSIDE
•
OPERATING PRESSURE: 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE1.625 INCHES FIRST END IN
CONNECTION TYPETHREADED INTERNAL TUBE FIRST END
FURNISHED ITEMS AND QUANTITY1 HOSE COUPLING NUT
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT (UNJ) FIRST END
SPECIFICATION/STANDARD DATA81349--83798/3-20 GOVERNMENT SPECIFICATION
MATERIALALUMINUM ALLOY 5052 AND ALUMINUM ALLOY 6061 OVERALL
SURFACE TREATMENTANODIZE OUTSIDE
OPERATING PRESSURE500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
LEG LENGTH3.380 INCHES NOMINAL SECOND END IN
SEAT ANGLE37.0 DEGREES FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
8891-16DInterchangeable
interchangeable cross-reference
interchangeable
MS87020-16Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-83798/3Interchangeable
interchangeable cross-reference
interchangeable
680-4Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-83798/3Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-83798Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M83798/3-20?
M83798/3-20 is a M83798/3-20.
What parts can replace M83798/3-20?
There are 28 known substitutes for M83798/3-20: 8891-16D, MS87020-16, MIL-DTL-83798/3 and 25 more. Substitute compatibility should be verified for your specific system.
Is M83798/3-20 still available?
M83798/3-20 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