The Ring,wearing, cataloged under National Stock Number 4320-00-784-8998, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-784-8998 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | PLAIN |
| Body Outside Diameter | 3.120 INCHES MINIMUM AND 3.125 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-18262 CLASS 2 MIL SPEC ALL MATERIAL RESPONSES |
| Body Inside Diameter | 2.754 INCHES MINIMUM AND 2.756 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| CA9051 | D/9 Drawing number reference only U.S. Government activity |
| CA9051-10-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4320-00-784-8998 is a Ring,wearing, classified under FSC 4320, Power and Hand Pumps. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4320-01-199-1892, 4320-01-199-1897. Verify interchangeability with system specifications before substitution.
Key specifications for 4320-00-784-8998: Corner Shape: SQUARE ALL CORNERS; Body Style: PLAIN; Body Outside Diameter: 3.120 INCHES MINIMUM AND 3.125 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-18262 CLASS 2 MIL SPEC ALL MATERIAL RESPONSES. 6 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.