The Ring,wearing, cataloged under National Stock Number 4320-00-290-8516, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-290-8516 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Center Flange Thickness | 0.312 INCHES NOMINAL IN |
| Flange Diameter | 5.875 INCHES MINIMUM AND 5.880 INCHES MAXIMUM IN |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | ROUND INSIDE RIGHT CORNER |
| Corner Radius | 0.250 INCHES NOMINAL INSIDE RIGHT CORNER IN |
| Body Style | INTERNAL AND EXTERNAL FLANGE |
| Body Outside Diameter | 5.623 INCHES MINIMUM AND 5.624 INCHES MAXIMUM IN |
| End to Flange Distance | 0.252 INCHES MINIMUM AND 0.256 INCHES MAXIMUM IN |
| Internal Flange Inside Diameter | 4.000 INCHES NOMINAL IN |
| Body Inside Diameter | 5.279 INCHES MINIMUM AND 5.281 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY |
| Internal Flange Width | 0.625 INCHES NOMINAL IN |
| Distance From Hole Center to Right Face | 0.250 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 |
| Reference | Meaning |
|---|---|
| CA9090-9-1NICU | 3/2 Design control — primary reference U.S. Government activity |
NSN 4320-00-290-8516 is a Ring,wearing, classified under FSC 4320, Power and Hand Pumps. Status: active.
Key specifications for 4320-00-290-8516: Center Flange Thickness: 0.312 INCHES NOMINAL IN; Flange Diameter: 5.875 INCHES MINIMUM AND 5.880 INCHES MAXIMUM IN; Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER. 15 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.