The Ring,retaining, cataloged under National Stock Number 5325-01-421-8651, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Textron Aviation Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-01-421-8651 |
| Primary Part Number | 643971 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Textron Aviation Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 643971 PRIMARY | Textron Aviation Inc (USA) |
| Reference | Meaning |
|---|---|
| 643971 | 3/9 Design control — primary reference Beechcraft Corporation Dba Textron Aviation |
NSN 5325-01-421-8651 is a Ring,retaining, manufactured by Textron Aviation Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-421-8651 has 1 manufacturer part number on file: 643971 (Textron Aviation Inc).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-5901. Verify interchangeability with system specifications before substitution.
Key specifications for 643971: End Item Identification: BEECHCRAFT BONANZA. 0 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.