The Ring,wearing, cataloged under National Stock Number 4320-00-978-8941, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-978-8941 |
| Primary Part Number | D2B17AG |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES ALL SURFACES |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | PLAIN |
| Body Outside Diameter | 4.018 INCHES NOMINAL IN |
| Body Inside Diameter | 3.625 INCHES NOMINAL IN |
| 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 |
|---|---|
| D2B17AG PRIMARY | Fairbanks Morse, Llc (USA) |
| 55-22124-19 PRIMARY | Euramco Safety Inc (USA) |
| 99G2BS | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| D2B17AG | 5/9 Secondary reference U.S. Government activity |
| 99G2BS | 5/9 Secondary reference U.S. Government activity |
NSN 4320-00-978-8941 is a Ring,wearing, manufactured by Fairbanks Morse, Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-978-8941 has 3 manufacturer part numbers on file: D2B17AG (Fairbanks Morse, Llc), 55-22124-19 (Euramco Safety Inc), 99G2BS (Fairbanks Morse, Llc).
Key specifications for D2B17AG: Surface Finish: 125.0 MICROINCHES ALL SURFACES; Corner Shape: SQUARE ALL CORNERS; Body Style: PLAIN; Body Outside Diameter: 4.018 INCHES NOMINAL IN. 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.