The Ring,retaining, cataloged under National Stock Number 5325-00-425-8529, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 10 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-425-8529 |
| Primary Part Number | 4010239 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| End Style | 90 DEGREE PARALLEL |
| Material Diameter | 0.060 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5698 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 3.705 INCHES MINIMUM AND 3.795 INCHES MAXIMUM IN |
| Inside Diameter | 3.575 INCHES MINIMUM AND 3.675 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Material | NICKEL ALLOY X-750 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 4010239 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 5325PL0789078 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4010239 | 5/9 Secondary reference Castle Industries Inc. of California Dba M.c. Gill |
| 4010239 | 5/9 Secondary reference Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring |
| 4010239 | 5/9 Secondary reference U.S. Government activity |
| 4010239 | 5/9 Secondary reference U.S. Government activity |
| 4010239 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 4010239 | 5/9 Secondary reference Hoffmann-Werke |
| 4010239 | 5/9 Secondary reference U.S. Government activity |
NSN 5325-00-425-8529 is a Ring,retaining, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-425-8529 has 1 manufacturer part number on file: 4010239 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-550-7476. Verify interchangeability with system specifications before substitution.
Key specifications for 4010239: Usage Design: INTERNAL; End Style: 90 DEGREE PARALLEL; Material Diameter: 0.060 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN; Material Document and Classification: AMS 5698 ASSN STD SINGLE MATERIAL RESPONSE. 10 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.