The Ring,lock,serrated, cataloged under National Stock Number 5365-01-128-5299, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-01-128-5299 |
| Item Name | Ring,lock,serrated |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Status | ACTIVE |
| Material Document and Classification | AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE |
| Overall Outside Diameter | 0.349 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN |
| Inner Serration Quantity | 13 |
| Pilot Diameter | 0.298 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Inside Diameter | 0.210 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN |
| Side Outer Serrations Omitted for Close Edge Installation | TWO SIDES |
| Surface Treatment | PASSIVATE |
| Outer Serration Quantity | 8 |
| Material | IRON ALLOY 660 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-I-45910 | 4/1 Identification reference U.S. Government activity |
| MS51997E102P | 2/2 Government specification standardization U.S. Government activity |
NSN 5365-01-128-5299 is a Ring,lock,serrated, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5365-01-129-0934. Verify interchangeability with system specifications before substitution.
Key specifications for 5365-01-128-5299: Overall Height: 0.095 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Material Document and Classification: AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE; Overall Outside Diameter: 0.349 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN; Inner Serration Quantity: 13. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.