The Ring,piston, cataloged under National Stock Number 3040-01-424-0865, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Bosch Rexroth Ab. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Ring,piston |
| FSC / FSG | 3040 — Miscellaneous Power Transmission Equipment (FSG 30) |
| Manufacturers | Bosch Rexroth Ab (CAGE A094N) |
| Parameter | Value |
|---|---|
| NSN | 3040-01-424-0865 |
| Primary Part Number | R939053139 |
| Item Name | Ring,piston |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Bosch Rexroth Ab |
| Status | ACTIVE |
| 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 |
|---|---|
| R939053139 PRIMARY | Bosch Rexroth Ab (SWE) |
| Reference | Meaning |
|---|---|
| 2186 4101-115 | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division |
| 21864101-115 | 3/9 Design control — primary reference Hagglunds Drive Production Ab |
| 1781301-802 | D/9 Drawing number reference only Hagglunds Drive Production Ab |
| 21864101-115 | 5/9 Secondary reference Bosch Rexroth Ab |
| 1781301-802 IT 009 | 5/9 Secondary reference Hagglunds Drive Production Ab |
NSN 3040-01-424-0865 is a Ring,piston, manufactured by Bosch Rexroth Ab, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-424-0865 has 1 manufacturer part number on file: R939053139 (Bosch Rexroth Ab).
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-424-2154, 3040-01-424-2156, 3040-01-424-2157. Verify interchangeability with system specifications before substitution.
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.