PartsTable
Technical Data Sheet
MS21904D4 ✓ 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 SLEEVE,CLINCH,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, flow_angle: 90.0 DEGREES, leg_length: 0.875 INCHES NOMINAL ALL ENDS IN, seat_angle: 12.0 DEGREES ALL ENDS, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-194-1065, 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
MS21904D4
NSN: 4730-00-194-1065
FSC: 4730
CAGE: A0170 — LEONARDO SPA AERONAUTICS DIVISION - POMIGLIANO D'ARCO SITE (ITA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
flow_angle90.0 DEGREES
leg_length0.875 INCHES NOMINAL ALL ENDS IN
seat_angle12.0 DEGREES ALL ENDS
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_styleFLARELESS (TUBE) ALL ENDS
surface_treatmentANODIZE OVERALL
nominal_thread_size0.438 INCHES ALL ENDS IN
media_for_which_designedFLUID SINGLE RESPONSE
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
specification/standard_data96906-MS2190 GOVERNMENT STANDARD
NSN4730-00-194-1065
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21904D4 · 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
SPECIFICATION/STANDARD DATA: 96906-MS2190 GOVERNMENT STANDARD
MEDIA FOR WHICH DESIGNED: FLUID SINGLE RESPONSE
MATERIAL: ALUMINUM ALLOY OVERALL
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
CONNECTION TYPE: THREADED EXTERNAL TUBE ALL ENDS
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
SPECIFICATION/STANDARD DATA96906-MS2190 GOVERNMENT STANDARD
MEDIA FOR WHICH DESIGNEDFLUID SINGLE RESPONSE
MEDIA FOR WHICH DESIGNEDFLUID SINGLE RESPONSE
MATERIALALUMINUM ALLOY OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
THREAD CLASS3A ALL ENDS A
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
AS21900-3Interchangeable
interchangeable cross-reference
interchangeable
MILF18280AInterchangeable
interchangeable cross-reference
interchangeable
MS21900-3Interchangeable
interchangeable cross-reference
interchangeable
4730005411756Interchangeable
interchangeable cross-reference
interchangeable
MS21924-8Interchangeable
interchangeable cross-reference
interchangeable
AS21922Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21904D4?
MS21904D4 is a SLEEVE,CLINCH,TUBE FITTING.
What parts can replace MS21904D4?
There are 9 known substitutes for MS21904D4: AS21900-3, MILF18280A, MS21900-3 and 6 more. Substitute compatibility should be verified for your specific system.
Is MS21904D4 still available?
MS21904D4 is currently cancelled.
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