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11578405 — OBTURATOR

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

11578405: OBTURATOR.

The OBTURATOR is a the manufacturer industrial component. Key specifications include material: COPPER AND STEEL, thickness: 6.674 INCHES NOMINAL IN, model_number: M1A1 OR M1A2, inside_diameter: 1.105 INCHES NOMINAL IN, breechblock_type: ECCENTRIC SCREW, outside_diameter: 6.674 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 1095-00-417-2914, 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
11578405
NSN: 1095-00-417-2914
FSC: 1095 — Miscellaneous Weapons
CAGE: 19206 — ARMY, UNITED STATES DEPARTMENT OF THE DBA WATERVLIET ARSENAL DIV BUSINESS DEVELOPMENT (USA)
SPECIFICATIONS
materialCOPPER AND STEEL
thickness6.674 INCHES NOMINAL IN
model_numberM1A1 OR M1A2
inside_diameter1.105 INCHES NOMINAL IN
breechblock_typeECCENTRIC SCREW
outside_diameter6.674 INCHES NOMINAL IN
size_designation155 MILLIMETER MM
special_featuresC/O SHAFT,PN 11578404;PLUG,PN 7305011;GASKET,PN 5000325
NSN1095-00-417-2914
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available OBTURATOR TITLE COMPONENT PN 11578405 MFR OBTURATOR
KEY FEATURES
•
MODEL NUMBER: M1A1 OR M1A2
•
BREECHBLOCK TYPE: ECCENTRIC SCREW
•
OUTSIDE DIAMETER: 6.674 INCHES NOMINAL IN
•
SIZE DESIGNATION: 155 MILLIMETER MM
•
INSIDE DIAMETER: 1.105 INCHES NOMINAL IN
•
MATERIAL: COPPER AND STEEL
•
THICKNESS: 6.674 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MODEL NUMBERM1A1 OR M1A2
BREECHBLOCK TYPEECCENTRIC SCREW
OUTSIDE DIAMETER6.674 INCHES NOMINAL IN
SIZE DESIGNATION155 MILLIMETER MM
INSIDE DIAMETER1.105 INCHES NOMINAL IN
SPECIAL FEATURESC/O SHAFT,PN 11578404;PLUG,PN 7305011;GASKET,PN 5000325
MATERIALCOPPER AND STEEL
THICKNESS6.674 INCHES NOMINAL IN
OTHER ITEMS IN FSC 1095 — Miscellaneous Weapons
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1095-00-003-0497 1095-00-003-0498 1095-00-003-0499 1095-00-003-0500 1095-00-003-0501 1095-00-003-0502 1095-00-003-0503 1095-00-003-0504
SUBSTITUTES & CROSS-REFERENCES 1
1025004172914Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is 11578405?
11578405 is a OBTURATOR.
What parts can replace 11578405?
There is 1 known substitute for 11578405: 1025004172914. Substitute compatibility should be verified for your specific system.
What is the NSN for 11578405?
11578405 is cataloged in the U.S. Government catalog under NSN 1095-00-417-2914. 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.