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MS21915-8-6C — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS21915-8-6C: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, seat_angle: 12.0 DEGREES FIRST END, thread_class: 3B SECOND END, connection_type: THREADED INTERNAL BOSS SECOND END, connection_style: GASKET SEAL (BOSS) SECOND END, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-810-3476, 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
MS21915-8-6C
NSN: 4730-00-810-3476
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
seat_angle12.0 DEGREES FIRST END
thread_class3B SECOND END
connection_typeTHREADED INTERNAL BOSS SECOND END
connection_styleGASKET SEAL (BOSS) SECOND END
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.562 INCHES ALL ENDS IN
nominal_overall_length1.469 INCHES IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
specification/standard_data96906-MS21915 GOVERNMENT STANDARD
material_document_and_classification66 AISI OR SAE @302 OR 303 OR 304 OR 316 OR 321 FED STD SINGLE MATERIAL RESPONSE OVERALL
nominal_outside_diameter_tube_accommodated0.375 INCHES FIRST END IN
NSN4730-00-810-3476
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21915-8-6C · 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-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE
•
CONNECTION STYLE: FLARELESS (TUBE) FIRST END
•
NOMINAL OVERALL LENGTH: 1.469 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 AISI OR SAE @302 OR 303 OR 304 OR 316 OR 321 FED STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072,E300,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
CONNECTION STYLEFLARELESS (TUBE) FIRST END
CONNECTION STYLEGASKET SEAL (BOSS) SECOND END
NOMINAL OVERALL LENGTH1.469 INCHES IN
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CONNECTION TYPETHREADED INTERNAL BOSS SECOND END
MATERIAL DOCUMENT AND CLASSIFICATION66 AISI OR SAE @302 OR 303 OR 304 OR 316 OR 321 FED STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES FIRST END IN
NOMINAL THREAD SIZE0.562 INCHES ALL ENDS IN
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 1
SAE-AS18280Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS21915-8-6C?
MS21915-8-6C is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MS21915-8-6C?
There is 1 known substitute for MS21915-8-6C: SAE-AS18280. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21915-8-6C?
MS21915-8-6C is cataloged in the U.S. Government catalog under NSN 4730-00-810-3476. 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.