The Ring,retaining, cataloged under National Stock Number 5325-00-558-6908, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-558-6908 |
| Primary Part Number | 512976 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| Material Diameter | 0.070 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| Criticality Code Justification | FEAT |
| Material Document and Classification | AMS 5688 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 1.700 INCHES MINIMUM AND 1.704 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SINGLE LEG OFFSET |
| Material | STEEL COMP 302 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 512976 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 512976 | 5/9 Secondary reference Hamilton Sundstrand Corporation Dba Collins Aerospace |
NSN 5325-00-558-6908 is a Ring,retaining, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-558-6908 has 1 manufacturer part number on file: 512976 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
1 possible match (shared part number, not a government interchangeability claim): 2590-01-640-6767. Verify interchangeability with system specifications before substitution.
Key specifications for 512976: Usage Design: EXTERNAL; Material Diameter: 0.070 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN; Criticality Code Justification: FEAT; Material Document and Classification: AMS 5688 ASSN STD SINGLE MATERIAL RESPONSE. 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.