The Ring,retaining, cataloged under National Stock Number 5325-00-018-7182, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-018-7182 |
| Primary Part Number | 579370 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Material Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| Usage Design | EXTERNAL OR INTERNAL |
| End Style | 90 DEGREE PARALLEL |
| Material Document and Classification | AMS 5120, COMPOSITION 1074 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 3.900 INCHES MINIMUM AND 3.990 INCHES MAXIMUM IN |
| Major Thickness | 0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN |
| Inside Diameter | 3.640 INCHES MINIMUM AND 3.710 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL |
| Surface Treatment | CADMIUM |
| Material | STEEL COMP 1074 |
| 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 |
|---|---|
| 579370 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 579370 | 5/2 Secondary reference U.S. Government activity |
| 579370 | 5/9 Secondary reference Royal Oak Gage, Inc |
NSN 5325-00-018-7182 is a Ring,retaining, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-018-7182 has 1 manufacturer part number on file: 579370 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 579370: Material Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Usage Design: EXTERNAL OR INTERNAL; End Style: 90 DEGREE PARALLEL; Material Document and Classification: AMS 5120, COMPOSITION 1074 ASSN STD SINGLE MATERIAL RESPONSE. 12 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.