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MS51990C103 — RING,LOCK,SERRATED

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

MS51990C103: RING,LOCK,SERRATED.

The RING,LOCK,SERRATED is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, overall_height: 0.099 INCHES NOMINAL IN, pilot_diameter: 0.255 INCHES NOMINAL IN, inside_diameter: 0.189 INCHES NOMINAL IN, surface_treatment: PASSIVATE, inner_serration_quantity: 16. This part is cataloged in the U.S.

Government catalog under NSN 5365-00-136-0184, 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
MS51990C103
NSN: 5365-00-136-0184
FSC: 5365 — Bushings, Rings, Shims, and Spacers
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
overall_height0.099 INCHES NOMINAL IN
pilot_diameter0.255 INCHES NOMINAL IN
inside_diameter0.189 INCHES NOMINAL IN
surface_treatmentPASSIVATE
inner_serration_quantity16
outer_serration_quantity20
overall_outside_diameter0.308 INCHES NOMINAL IN
NSN5365-00-136-0184
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,LOCK,SERRATED TITLE COMPONENT PN MS51990C103 MFR RING,LOCK,SERRATED
KEY FEATURES
•
OVERALL OUTSIDE DIAMETER: 0.308 INCHES NOMINAL IN
•
INNER SERRATION QUANTITY: 16
•
PILOT DIAMETER: 0.255 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.189 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE
•
OUTER SERRATION QUANTITY: 20
•
MATERIAL: STEEL CORROSION RESISTING
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.099 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER0.308 INCHES NOMINAL IN
INNER SERRATION QUANTITY16
PILOT DIAMETER0.255 INCHES NOMINAL IN
INSIDE DIAMETER0.189 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE
OUTER SERRATION QUANTITY20
MATERIALSTEEL CORROSION RESISTING
SUBSTITUTES & CROSS-REFERENCES 4
AA59558-202Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5365PL0170741Reference document
Same NSN cross-reference
Reference document — Informative reference only
A-A-59558Reference document
Same NSN cross-reference
Reference document — Identification reference
MS51990E103PReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS51990C103?
MS51990C103 is a RING,LOCK,SERRATED.
What parts can replace MS51990C103?
There are 4 known substitutes for MS51990C103: AA59558-202, 5365PL0170741, A-A-59558 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51990C103?
MS51990C103 is cataloged in the U.S. Government catalog under NSN 5365-00-136-0184. 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.