The Ring,lock,serrated, cataloged under National Stock Number 5365-01-012-7597, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-01-012-7597 |
| Primary Part Number | MS51990E105P |
| Item Name | Ring,lock,serrated |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE |
| Material Document and Classification | AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE |
| Overall Outside Diameter | 0.395 INCHES MINIMUM AND 0.404 INCHES MAXIMUM IN |
| Inner Serration Quantity | 17 |
| Pilot Diameter | 0.343 INCHES NOMINAL IN |
| Inside Diameter | 0.263 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN |
| Side Outer Serrations Omitted for Close Edge Installation | TWO SIDES |
| Surface Treatment | PASSIVATE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| MS51990E105P PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AS51990-E105P | 5/9 Secondary reference Sae International Dba Sae International |
| RLRR24SU7 | 5/1 Secondary reference U.S. Government activity |
| MS51990E105P | 5/9 Secondary reference U.S. Government activity |
| BLRR24SU7 | 5/9 Secondary reference U.S. Government activity |
| AS51990 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AA59558-204 | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| 5365PL2228900 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| A-A-59558 | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
NSN 5365-01-012-7597 is a Ring,lock,serrated, manufactured by Sae International Dba Sae International, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-01-012-7597 has 1 manufacturer part number on file: MS51990E105P (Sae International Dba Sae International).
Key specifications for MS51990E105P: Overall Height: 0.112 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE; Material Document and Classification: AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE; Overall Outside Diameter: 0.395 INCHES MINIMUM AND 0.404 INCHES MAXIMUM IN. 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.