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AS51990 — RING,LOCK,SERRATED

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

AS51990: RING,LOCK,SERRATED.

The RING,LOCK,SERRATED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8740, overall_height: 0.171 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN, pilot_diameter: 0.953 INCHES MINIMUM AND 0.963 INCHES MAXIMUM IN, inside_diameter: 0.905 INCHES MINIMUM AND 0.912 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE, inner_serration_quantity: 30. This part is cataloged in the U.S.

Government catalog under NSN 5365-00-218-4927, 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
AS51990
NSN: 5365-00-218-4927
NIINs: 002184927, 002184929, 004057576, 004841673, 005436932, 007621908, 010089632, 010127597, 010206297, 017005596
FSC: 5365 — Bushings, Rings, Shims, and Spacers
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8740
overall_height0.171 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN
pilot_diameter0.953 INCHES MINIMUM AND 0.963 INCHES MAXIMUM IN
inside_diameter0.905 INCHES MINIMUM AND 0.912 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE
inner_serration_quantity30
outer_serration_quantity20
overall_outside_diameter1.036 INCHES MINIMUM AND 1.045 INCHES MAXIMUM IN
material_document_and_classificationAMS6370 AEROSPACE MATERIAL SPEC STD 1ST MATERIAL RESPONSE OR AMS6382 AEROSPACE MATERIAL SPEC STD 2ND MATERIAL RESPONSE OR AMS6322 AEROSPACE MATERIAL SPEC STD 3RD MATERIAL RESPONSE
part_name_assigned_by_controlling_agencyRING,LOCK,SERRATED
surface_treatment_document_and_classificationAMS-QQ-P-416, TYPE II, CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE
NSN5365-00-218-4927
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,LOCK,SERRATED TITLE COMPONENT PN AS51990 MFR RING,LOCK,SERRATED
KEY FEATURES
•
OVERALL OUTSIDE DIAMETER: 0.906 INCHES MINIMUM AND 0.915 INCHES MAXIMUM IN
•
INNER SERRATION QUANTITY: 30
•
PILOT DIAMETER: 0.837 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.692 INCHES MINIMUM AND 0.699 INCHES MAXIMUM IN
•
SIDE OUTER SERRATIONS OMITTED FOR CLOSE EDGE INSTALLATION: TWO SIDES
•
SURFACE TREATMENT: CADMIUM AND CHROMATE
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.176 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER0.906 INCHES MINIMUM AND 0.915 INCHES MAXIMUM IN
INNER SERRATION QUANTITY30
PILOT DIAMETER0.837 INCHES NOMINAL IN
INSIDE DIAMETER0.692 INCHES MINIMUM AND 0.699 INCHES MAXIMUM IN
SIDE OUTER SERRATIONS OMITTED FOR CLOSE EDGE INSTALLATIONTWO SIDES
SURFACE TREATMENTCADMIUM AND CHROMATE
END ITEM IDENTIFICATIONARMORED MULTI-PURPOSE VEHICLE (AMPV)
MATERIALSTEEL COMP 1117
SUBSTITUTES & CROSS-REFERENCES 6
AA59558-109Reference document
Same NSN cross-reference
Reference document — Secondary reference
52511-230ADLSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MS51990Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS51990-110PReference document
Same NSN cross-reference
Reference document — Secondary reference
A-A-59558Reference document
Same NSN cross-reference
Reference document — Secondary reference
RLRR56SB11Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS51990?
AS51990 is a RING,LOCK,SERRATED.
What parts can replace AS51990?
There are 6 known substitutes for AS51990: AA59558-109, 52511-230ADL, MS51990 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS51990?
AS51990 is cataloged in the U.S. Government catalog under NSN 5365-00-218-4927. This indicates validated use in U.S. government and defense supply chains.
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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.