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Technical Data Sheet
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731578 — DISC,COUPLING

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

731578: DISC,COUPLING.

The DISC,COUPLING is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: STEEL;0.250 IN. ID,0.687 IN.

OD,0.062 IN. THK IN. This part is cataloged in the U.S.

Government catalog under NSN 1020-00-210-1105, 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
731578
NSN: 1020-00-210-1105
FSC: 1020 — Guns, Over 125mm Through 150mm
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
general_characteristics_item_descriptionSTEEL;0.250 IN. ID,0.687 IN. OD,0.062 IN. THK IN
NSN1020-00-210-1105
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available DISC,COUPLING TITLE COMPONENT PN 731578 MFR DISC,COUPLING
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL;0.250 IN. ID,0.687 IN. OD,0.062 IN. THK IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL;0.250 IN. ID,0.687 IN. OD,0.062 IN. THK IN
OTHER ITEMS IN FSC 1020 — Guns, Over 125mm Through 150mm
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1020-00-008-5177 1020-00-008-5178 1020-00-008-5179 1020-00-008-5181 1020-00-008-5187 1020-00-008-5188 1020-00-008-5190
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 731578?
731578 is a DISC,COUPLING.
What is the NSN for 731578?
731578 is cataloged in the U.S. Government catalog under NSN 1020-00-210-1105. 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.