The Ring,lock,serrated, cataloged under National Stock Number 5365-01-202-6598, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-01-202-6598 |
| Item Name | Ring,lock,serrated |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Status | ACTIVE |
| Overall Outside Diameter | 0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN |
| Inner Serration Quantity | 13 |
| Pilot Diameter | 0.338 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN |
| Inside Diameter | 0.208 INCHES MINIMUM AND 0.218 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE |
| Outer Serration Quantity | 24 |
| Material | STEEL COMP 1117 |
| 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 |
|---|---|
| DRA-163-C | 5/1 Secondary reference U.S. Government activity |
| RLRR2421SB6 | 3/2 Design control — primary reference U.S. Government activity |
| RR2421SB-6 | 5/2 Secondary reference U.S. Government activity |
| RLRR2421SA6 | 5/2 Secondary reference U.S. Government activity |
NSN 5365-01-202-6598 is a Ring,lock,serrated, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5365-01-202-6599, 5365-01-202-6600. Verify interchangeability with system specifications before substitution.
Key specifications for 5365-01-202-6598: Overall Height: 0.094 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN; Overall Outside Diameter: 0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN; Inner Serration Quantity: 13; Pilot Diameter: 0.338 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN. 7 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.