The Ring,retaining, cataloged under National Stock Number 5325-00-598-4891, 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 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-598-4891 |
| Primary Part Number | 185290 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Material Hardness Rating | 65.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 68.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM |
| Usage Design | EXTERNAL |
| Strength Rating | ERR-060 |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 0.735 INCHES NOMINAL IN |
| Major Thickness | 0.027 INCHES NOMINAL IN |
| Inside Diameter | 0.621 INCHES MINIMUM AND 0.629 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPIRAL |
| Surface Treatment | CADMIUM |
| Material | STEEL |
| 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 |
|---|---|
| 185290 77445 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 185290 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 185290 | 5/9 Secondary reference Ratchford Corp |
| 185290 | 5/9 Secondary reference Adams Industries Inc a Sub of Banner Industries Inc |
| 185290 | 5/9 Secondary reference Rtx Corporation Div Pratt & Whitney |
| 185290 | 5/2 Secondary reference U.S. Government activity |
NSN 5325-00-598-4891 is a Ring,retaining, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-598-4891 has 2 manufacturer part numbers on file: 185290 77445 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 185290 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 185290: Material Hardness Rating: 65.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 68.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM; Usage Design: EXTERNAL; Strength Rating: ERR-060; Cross-Sectional Shape Style: DOUBLE OVAL. 11 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.