The Ring,wearing, cataloged under National Stock Number 4320-00-398-8065, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4320-00-398-8065 |
| Primary Part Number | 291P |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Distance Between Flanges | 0.505 INCHES NOMINAL IN |
| Internal Flange Outside Diameter | 4.640 INCHES NOMINAL IN |
| Body Outside Diameter | 5.623 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 4.125 INCHES NOMINAL IN |
| Left Side Flange Thickness | 0.250 INCHES NOMINAL IN |
| Body Inside Diameter | 5.095 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Largest External Anchor Flange Radius | 3.031 INCHES NOMINAL IN |
| 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 |
|---|---|
| 291P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 255046-15 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 291P | 3/9 Design control — primary reference U.S. Government activity |
| SL5046PC63 | 5/9 Secondary reference U.S. Government activity |
| 255046-15 | 5/9 Secondary reference U.S. Government activity |
| SL5051PC63 | 5/9 Secondary reference U.S. Government activity |
NSN 4320-00-398-8065 is a Ring,wearing, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-398-8065 has 2 manufacturer part numbers on file: 291P (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 255046-15 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 291P: Distance Between Flanges: 0.505 INCHES NOMINAL IN; Internal Flange Outside Diameter: 4.640 INCHES NOMINAL IN; Body Outside Diameter: 5.623 INCHES NOMINAL IN; Internal Flange Inside Diameter: 4.125 INCHES NOMINAL IN. 8 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.