The Ring,piston, cataloged under National Stock Number 4310-01-507-3992, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Bosch Rexroth Corporation Div Industrial Hydraulics. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4310-01-507-3992 |
| Primary Part Number | R909831887 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Bosch Rexroth Corporation Div Industrial Hydraulics |
| 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 |
|---|---|
| R909831887 PRIMARY | Bosch Rexroth Corporation Div Industrial Hydraulics (USA) |
| Reference | Meaning |
|---|---|
| 156245 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 156245 | 5/9 Secondary reference Bosch Rexroth Corporation Div Industrial Hydraulics |
NSN 4310-01-507-3992 is a Ring,piston, manufactured by Bosch Rexroth Corporation Div Industrial Hydraulics, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-507-3992 has 1 manufacturer part number on file: R909831887 (Bosch Rexroth Corporation Div Industrial Hydraulics).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-605-3704. Verify interchangeability with system specifications before substitution.
Key specifications for R909831887: Special Features: USED ON HYDRAULIC PUMP/MOTOR; End Item Identification: CRANE, BOAT & AIRCRAFT. 0 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.