The Ring,retaining, cataloged under National Stock Number 5325-00-181-5145, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Orlando Spring Corp. Government technical data includes 11 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-181-5145 |
| Primary Part Number | S2130661-020C |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Orlando Spring Corp |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| End Style | VERTEX CENTER OR ABOVE |
| Material Diameter | 0.039 INCHES NOMINAL IN |
| Material Document and Classification | MIL-W-6101 MIL SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 0.698 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN |
| Inside Diameter | 0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Surface Treatment | CADMIUM |
| 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 |
|---|---|
| S2130661-020C | Orlando Spring Corp (USA) |
| Reference | Meaning |
|---|---|
| 2130661-020C | 5/9 Secondary reference The Boeing Company |
| S2130661-020C | 5/2 Secondary reference U.S. Government activity |
| 2130661-020C | 3/2 Design control — primary reference U.S. Government activity |
| S2130661-020C | 5/9 Secondary reference The Boeing Company |
NSN 5325-00-181-5145 is a Ring,retaining, manufactured by Orlando Spring Corp, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-181-5145 has 1 manufacturer part number on file: S2130661-020C (Orlando Spring Corp).
Key specifications for S2130661-020C: Usage Design: INTERNAL; End Style: VERTEX CENTER OR ABOVE; Material Diameter: 0.039 INCHES NOMINAL IN; Material Document and Classification: MIL-W-6101 MIL SPEC SINGLE MATERIAL RESPONSE. 11 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.