The Ring,wearing, cataloged under National Stock Number 4320-00-446-0018, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4320-00-446-0018 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES LEFT FACE |
| Surface Finish | 125.0 MICROINCHES INSIDE |
| Surface Finish | 250.0 MICROINCHES OUTSIDE |
| Surface Finish | 250.0 MICROINCHES RIGHT FACE |
| Flange Diameter | 5.498 INCHES MINIMUM AND 5.499 INCHES MAXIMUM IN |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | ROUND INSIDE RIGHT CORNER |
| Corner Shape | CHAMFERED OUTSIDE RIGHT CORNER |
| Distance Between Flanges | 0.188 INCHES NOMINAL IN |
| Corner Radius | 0.125 INCHES NOMINAL INSIDE LEFT CORNER IN |
| Body Outside Diameter | 5.271 INCHES MINIMUM AND 5.273 INCHES MAXIMUM IN |
| Left Side Flange Thickness | 0.750 INCHES NOMINAL IN |
| Body Inside Diameter | 4.985 INCHES MINIMUM AND 4.986 INCHES MAXIMUM IN |
| Right Side Flange Thickness | 0.312 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 08-104-104-00-001 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4320-00-446-0018 is a Ring,wearing, classified under FSC 4320, Power and Hand Pumps. Status: active.
Key specifications for 4320-00-446-0018: Surface Finish: 125.0 MICROINCHES LEFT FACE; Surface Finish: 125.0 MICROINCHES INSIDE; Surface Finish: 250.0 MICROINCHES OUTSIDE; Surface Finish: 250.0 MICROINCHES RIGHT FACE. 16 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.