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MS21914D5 — CAP,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS21914D5: CAP,TUBE.

The CAP,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, seat_angle: 37.0 DEGREES, thread_class: 3B INTERNAL, connection_style: PRESSURE SEAL FLARELESS, style_designator: CAP, TUBE, FLARELESS, thread_direction: RIGHT-HAND INTERNAL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-221-2118, 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
MS21914D5
NSN: 4730-00-221-2118
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
seat_angle37.0 DEGREES
thread_class3B INTERNAL
connection_stylePRESSURE SEAL FLARELESS
style_designatorCAP, TUBE, FLARELESS
thread_directionRIGHT-HAND INTERNAL
surface_treatmentANODIZE OVERALL
nominal_thread_size0.500 INCHES INTERNAL IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) INTERNAL
specification/standard_data96906-MS21914 GOVERNMENT STANDARD
material_document_and_classificationQQ-A-225/6 FED SPEC ALL MATERIAL RESPONSES OVERALL
tube_outside_diameter_for_which_designed0.312 INCHES NOMINAL IN
NSN4730-00-221-2118
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21914D5 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-862,TYPE 2 MIL SPEC ALL TREATMENT RESPONSES OVERALL
•
CONNECTION STYLE: PRESSURE SEAL FLARELESS
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.312 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CAP, TUBE, FLARELESS
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
THREAD DIRECTION: RIGHT-HAND INTERNAL
•
NOMINAL THREAD SIZE: 0.500 INCHES INTERNAL IN
•
SEAT ANGLE: 37.0 DEGREES
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-862,TYPE 2 MIL SPEC ALL TREATMENT RESPONSES OVERALL
CONNECTION STYLEPRESSURE SEAL FLARELESS
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.312 INCHES NOMINAL IN
STYLE DESIGNATORCAP, TUBE, FLARELESS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC ALL MATERIAL RESPONSES OVERALL
THREAD DIRECTIONRIGHT-HAND INTERNAL
NOMINAL THREAD SIZE0.500 INCHES INTERNAL IN
SEAT ANGLE37.0 DEGREES
SPECIFICATION/STANDARD DATA96906-MS21914 GOVERNMENT STANDARD
SURFACE TREATMENTANODIZE OVERALL
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 2
SAE-AS18280Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
ER929-5DReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS21914D5?
MS21914D5 is a CAP,TUBE.
What parts can replace MS21914D5?
There are 2 known substitutes for MS21914D5: SAE-AS18280, ER929-5D. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21914D5?
MS21914D5 is cataloged in the U.S. Government catalog under NSN 4730-00-221-2118. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.