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Technical Data Sheet
PartsTable / COMPONENT / M83798/1-4
M83798/1-4 ✓ 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 M83798/1-4 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-618-7378, 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
M83798/1-4
NSN: 4730-00-618-7378
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM83798/1-4
NSN4730-00-618-7378
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M83798/1-4 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 HOSE COUPLING NUT
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: STEEL COMP 1010 OVERALL
•
THREAD SERIES DESIGNATOR: UNF FIRST END
•
SEAT ANGLE: 37.0 DEGREES FIRST END
•
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED: 0.438 INCHES SECOND END IN
•
CONNECTION STYLE: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
•
NOMINAL THREAD SIZE: 0.438 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
FURNISHED ITEMS AND QUANTITY1 HOSE COUPLING NUT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL COMP 1010 OVERALL
THREAD SERIES DESIGNATORUNF FIRST END
SEAT ANGLE37.0 DEGREES FIRST END
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED0.438 INCHES SECOND END IN
CONNECTION STYLESWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
NOMINAL THREAD SIZE0.438 INCHES FIRST END IN
NOMINAL OVERALL LENGTH1.730 INCHES IN
CONNECTION STYLEGRIPPING NIPPLE (NOSE) SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
6764Interchangeable
interchangeable cross-reference
interchangeable
X15CHANGE2Interchangeable
interchangeable cross-reference
interchangeable
SCB35275Interchangeable
interchangeable cross-reference
interchangeable
33190AXInterchangeable
interchangeable cross-reference
interchangeable
A64SInterchangeable
interchangeable cross-reference
interchangeable
816-12DInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M83798/1-4?
M83798/1-4 is a M83798/1-4.
What parts can replace M83798/1-4?
There are 25 known substitutes for M83798/1-4: 6764, X15CHANGE2, SCB35275 and 22 more. Substitute compatibility should be verified for your specific system.
Is M83798/1-4 still available?
M83798/1-4 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