The Ring,retaining, cataloged under National Stock Number 5325-01-187-0491, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Yale Industrial Products, Inc. Div Duff Norton Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Ring,retaining |
| FSC / FSG | 5325 — Fastening Devices (FSG 53) |
| Manufacturers | Yale Industrial Products, Inc. Div Duff Norton Company (CAGE 18740) |
| Parameter | Value |
|---|---|
| NSN | 5325-01-187-0491 |
| Primary Part Number | 220018 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Yale Industrial Products, Inc. Div Duff Norton Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 220018 PRIMARY | Yale Industrial Products, Inc. Div Duff Norton Company (USA) |
| Reference | Meaning |
|---|---|
| 10399388 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5325-01-187-0491 is a Ring,retaining, manufactured by Yale Industrial Products, Inc. Div Duff Norton Company, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-187-0491 has 1 manufacturer part number on file: 220018 (Yale Industrial Products, Inc. Div Duff Norton Company).
3 possible matches (shared part number, not a government interchangeability claim): 2930-01-606-9918, 5325-01-646-6970, 4140-01-686-6250. Verify interchangeability with system specifications before substitution.
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.