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Technical Data Sheet
PartsTable / COMPONENT / MIL-F-83798/1
MIL-F-83798/1 ✓ 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 MIL-F-83798/1 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-613-1859, 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
MIL-F-83798/1
NSN: 4730-00-613-1859
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberMIL-F-83798/1
NSN4730-00-613-1859
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MIL-F-83798/1 · 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
•
SEAT ANGLE: 37.0 DEGREES FIRST END
•
THREAD SERIES DESIGNATOR: UNF FIRST END
•
MEDIA FOR WHICH DESIGNED: AERONAUTICAL FLUID SINGLE RESPONSE
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.375 INCHES FIRST END IN
•
NOMINAL THREAD SIZE: 0.562 INCHES FIRST END IN
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.344 INCHES SECOND END IN
•
FURNISHED ITEMS AND QUANTITY: 1 HOSE COUPLING NUT
•
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED: 0.547 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS (FLIS)
SEAT ANGLE37.0 DEGREES FIRST END
THREAD SERIES DESIGNATORUNF FIRST END
MEDIA FOR WHICH DESIGNEDAERONAUTICAL FLUID SINGLE RESPONSE
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES FIRST END IN
NOMINAL THREAD SIZE0.562 INCHES FIRST END IN
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.344 INCHES SECOND END IN
FURNISHED ITEMS AND QUANTITY1 HOSE COUPLING NUT
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED0.547 INCHES SECOND END IN
MAXIMUM OPERATING TEMP250.0 FAHRENHEIT SINGLE RESPONSE DEGF
THREAD CLASS3B FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
816-12DInterchangeable
interchangeable cross-reference
interchangeable
676-12DInterchangeable
interchangeable cross-reference
interchangeable
136-1000-20DInterchangeable
interchangeable cross-reference
interchangeable
MIL-F-83798Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-83798/1Interchangeable
interchangeable cross-reference
interchangeable
136-1000-16DInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-F-83798/1?
MIL-F-83798/1 is a MIL-F-83798/1.
What parts can replace MIL-F-83798/1?
There are 29 known substitutes for MIL-F-83798/1: 816-12D, 676-12D, 136-1000-20D and 26 more. Substitute compatibility should be verified for your specific system.
Is MIL-F-83798/1 still available?
MIL-F-83798/1 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