The Ring,retaining, cataloged under National Stock Number 5325-01-342-1945, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. 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 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 | 5325-01-342-1945 |
| Primary Part Number | 520179 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Usage Design | EXTERNAL AND INTERNAL |
| Material Diameter | 0.079 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5112 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 5.621 INCHES MINIMUM AND 5.643 INCHES MAXIMUM IN |
| Inside Diameter | 5.442 INCHES MINIMUM AND 5.562 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | ROUND CAP |
| Material | STEEL COMP 1090 |
| 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 |
|---|---|
| 520179 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5325-01-342-1945 is a Ring,retaining, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-342-1945 has 1 manufacturer part number on file: 520179 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-4951. Verify interchangeability with system specifications before substitution.
Key specifications for 520179: Usage Design: EXTERNAL AND INTERNAL; Material Diameter: 0.079 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN; Material Document and Classification: AMS 5112 ASSN STD SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: ROUND. 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.