The Ring,retaining, cataloged under National Stock Number 5325-01-571-2578, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-571-2578 |
| Primary Part Number | AER01X059000GF6A11 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Material Hardness Rating | 47.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 0.550 INCHES NOMINAL IN |
| Major Thickness | 0.035 INCHES NOMINAL IN |
| Ring Style | INTERNAL |
| Material | STEEL |
| 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 |
|---|---|
| AER01X059000GF6A11 PRIMARY | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| R271NAA0059NN056NNAA1 | 5/9 Secondary reference U.S. Government activity |
NSN 5325-01-571-2578 is a Ring,retaining, manufactured by The American Society of Mechanical Engineers, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-571-2578 has 1 manufacturer part number on file: AER01X059000GF6A11 (The American Society of Mechanical Engineers).
Key specifications for AER01X059000GF6A11: Material Hardness Rating: 47.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR; Outside Diameter: 0.550 INCHES NOMINAL IN; Major Thickness: 0.035 INCHES NOMINAL IN. 6 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.