The Ring,retaining, cataloged under National Stock Number 5325-00-562-2589, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-562-2589 |
| Primary Part Number | 16-1931 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| End Style | VERTEX BELOW CENTER |
| Cross-Sectional Shape Style | ROUNDED CORNERS |
| Outside Diameter | 0.375 INCHES NOMINAL IN |
| Major Thickness | 0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN |
| Inside Diameter | 0.156 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | STEEL |
| 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 |
|---|---|
| 16-1931 PRIMARY | Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| PO0456NRP | 3/9 Design control — primary reference Defense Logistics Agency Dba Defense Supply Center Philadelphia |
NSN 5325-00-562-2589 is a Ring,retaining, manufactured by Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-562-2589 has 1 manufacturer part number on file: 16-1931 (Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5815-00-981-7269, 5360-01-259-6126, 3655-01-642-6669. Verify interchangeability with system specifications before substitution.
Key specifications for 16-1931: Usage Design: EXTERNAL; End Style: VERTEX BELOW CENTER; Cross-Sectional Shape Style: ROUNDED CORNERS; Outside Diameter: 0.375 INCHES NOMINAL IN. 8 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.