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Technical Data Sheet
PartsTable / COMPONENT / MIL-F-83798
MIL-F-83798 ✓ 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 ADAPTER,STRAIGHT,TUBE TO HOSE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3B FIRST END, connection_type: THREADED EXTERNAL HOSE GRIPPING SECOND END, connection_style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END, nominal_thread_size: 0.875 INCHES FIRST END IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-238-5338, 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
NSN: 4730-00-238-5338
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
seat_angle37.0 DEGREES FIRST END
thread_class3B FIRST END
connection_typeTHREADED EXTERNAL HOSE GRIPPING SECOND END
connection_styleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
nominal_thread_size0.875 INCHES FIRST END IN
nominal_overall_length2.440 INCHES IN
end_item_identificationTEST SET, TTU-205
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
material_document_and_classificationQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
nominal_inside_diameter_hose_accommodated0.562 INCHES SECOND END IN
nominal_outside_diameter_hose_accommodated0.797 INCHES SECOND END IN
NSN4730-00-238-5338
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MIL-F-83798 · 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: ANODIZE OVERALL
•
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED: 0.948 INCHES SECOND END IN
•
FLOW ANGLE: 90.0 DEGREES
•
OPERATING PRESSURE: 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT (UNJ) FIRST END
•
CONNECTION TYPE: THREADED EXTERNAL HOSE GRIPPING SECOND END
TECHNICAL CHARACTERISTICS (FLIS)
FURNISHED ITEMS AND QUANTITY1 HOSE COUPLING NUT
SURFACE TREATMENTANODIZE OVERALL
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED0.948 INCHES SECOND END IN
FLOW ANGLE90.0 DEGREES
OPERATING PRESSURE1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT (UNJ) FIRST END
CONNECTION TYPETHREADED EXTERNAL HOSE GRIPPING SECOND END
CONNECTION STYLEGRIPPING NIPPLE (NOSE) SECOND END
LEG LENGTH2.660 INCHES NOMINAL SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 1
MS87020-12Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-F-83798?
MIL-F-83798 is a ADAPTER,STRAIGHT,TUBE TO HOSE.
What parts can replace MIL-F-83798?
There is 1 known substitute for MIL-F-83798: MS87020-12. Substitute compatibility should be verified for your specific system.
Is MIL-F-83798 still available?
MIL-F-83798 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