The Ring,retaining, cataloged under National Stock Number 5325-01-253-1599, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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) |
| Parameter | Value |
|---|---|
| NSN | 5325-01-253-1599 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| 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 |
| Reference | Meaning |
|---|---|
| WS-56 | 5/1 Secondary reference Smalley Steel Ring Co. |
| RS-56 | 5/1 Secondary reference U.S. Government activity |
| M2742610103A | 2/2 Government specification standardization U.S. Government activity |
| RD16545-56 | 5/1 Secondary reference Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec |
| MIL-DTL-27426 | 4/1 Identification reference U.S. Government activity |
| RS-56 | 5/1 Secondary reference Eaton Aerospace Llc Sterer Engineering Morgan Actuators |
| 3414-56P | 5/1 Secondary reference U.S. Government activity |
| D1273 PIECE 26 | 5/1 Secondary reference Eaton Aerospace Llc Sterer Engineering Morgan Actuators |
NSN 5325-01-253-1599 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 1710-01-572-4830, 5340-01-628-7712. 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.