The Ring,wearing, cataloged under National Stock Number 4320-00-652-2390, 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 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-652-2390 |
| Primary Part Number | 1F3919-18 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | CHAMFERED OUTSIDE RIGHT CORNER |
| Chamfer Length | 0.062 INCHES NOMINAL OUTSIDE RIGHT CORNER IN |
| Body Style | PLAIN |
| Body Outside Diameter | 2.546 INCHES NOMINAL IN |
| Body Inside Diameter | 2.156 INCHES NOMINAL IN |
| Chamfer Angle | 45.0 DEGREES NOMINAL OUTSIDE RIGHT CORNER |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 1F3919-18 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 1F3919-18 | Toolex, Inc Dba Toolex Inc (USA) |
| Reference | Meaning |
|---|---|
| 3T26088B3 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| 3T26088 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| CS6522390 | 5/9 Secondary reference Calabrese & Sons, Inc. |
NSN 4320-00-652-2390 is a Ring,wearing, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-652-2390 has 2 manufacturer part numbers on file: 1F3919-18 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 1F3919-18 (Toolex, Inc Dba Toolex Inc).
Key specifications for 1F3919-18: Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER; Corner Shape: SQUARE INSIDE LEFT CORNER; Corner Shape: CHAMFERED OUTSIDE RIGHT CORNER. 10 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.