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Technical Data Sheet
PartsTable / COMPONENT / M83798/9-20
M83798/9-20 ✓ 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 M83798/9-20 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-555-3749, 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
M83798/9-20
NSN: 4730-00-555-3749
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM83798/9-20
NSN4730-00-555-3749
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M83798/9-20 · 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
•
LEG LENGTH: 3.375 INCHES NOMINAL SECOND END IN
•
BOLT HOLE QUANTITY: 4 FIRST END
•
CONNECTION STYLE: GRIPPING NIPPLE (NOSE) SECOND END
•
NOMINAL LENGTH: 2.188 INCHES FIRST END IN
•
FLANGE SHAPE: RECTANGULAR WITH HOLES FIRST END
•
CONNECTION TYPE: FLANGE FIRST END
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
LEG LENGTH3.375 INCHES NOMINAL SECOND END IN
BOLT HOLE QUANTITY4 FIRST END
CONNECTION STYLEGRIPPING NIPPLE (NOSE) SECOND END
NOMINAL LENGTH2.188 INCHES FIRST END IN
LEG LENGTH1.500 INCHES NOMINAL FIRST END IN
FLANGE SHAPERECTANGULAR WITH HOLES FIRST END
CONNECTION TYPEFLANGE FIRST END
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
FURNISHED ITEMS AND QUANTITY1 HOSE COUPLING NUT
RAISED FACE NOMINAL HEIGHT0.020 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
M83798/9-16Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-83798/9Interchangeable
interchangeable cross-reference
interchangeable
136-3090-16DInterchangeable
interchangeable cross-reference
interchangeable
8890-12DInterchangeable
interchangeable cross-reference
interchangeable
136-3090-12DInterchangeable
interchangeable cross-reference
interchangeable
M83798/9-24Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M83798/9-20?
M83798/9-20 is a M83798/9-20.
What parts can replace M83798/9-20?
There are 13 known substitutes for M83798/9-20: M83798/9-16, MIL-DTL-83798/9, 136-3090-16D and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M83798/9-20?
M83798/9-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-555-3749. 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