The Ring,wearing, cataloged under National Stock Number 4320-01-033-1246, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-033-1246 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Center Flange Thickness | 0.187 INCHES NOMINAL IN |
| Surface Finish | 32.0 MICROINCHES ALL SURFACES |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | EXTERNAL LOCKING FLANGE |
| Body Outside Diameter | 4.375 INCHES NOMINAL IN |
| End to Flange Distance | 0.437 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 3.500 INCHES NOMINAL IN |
| Distance Below Centerline | 0.062 INCHES NOMINAL IN |
| Body Inside Diameter | 4.000 INCHES NOMINAL IN |
| Smallest External Anchor Flange Radius | 2.125 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Internal Flange Width | 0.250 INCHES NOMINAL IN |
| Largest External Anchor Flange Radius | 2.375 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 |
|---|---|
| 5018.22 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4320-01-033-1246 is a Ring,wearing, classified under FSC 4320, Power and Hand Pumps. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5950-01-155-9238. Verify interchangeability with system specifications before substitution.
Key specifications for 4320-01-033-1246: Center Flange Thickness: 0.187 INCHES NOMINAL IN; Surface Finish: 32.0 MICROINCHES ALL SURFACES; Corner Shape: SQUARE ALL CORNERS; Body Style: EXTERNAL LOCKING FLANGE. 13 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.