The Pump,axial Pistons, cataloged under National Stock Number 4320-01-282-6955, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Schroeder Industries Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-282-6955 |
| Primary Part Number | TB-850 |
| Item Name | Pump,axial Pistons |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Schroeder Industries Llc |
| Status | ACTIVE |
| Pumping Element Type | PISTON |
| Pumping Element Operating Position | HORIZONTAL |
| Reciprocating Stroke Type | VARIABLE |
| Pump Reciprocating Design | SINGLE ACTING |
| Control Location | CENTER |
| Volume Control Type | SERVO PISTON |
| Cylinder Quantity | 1 |
| Media for Which Designed | HYDROCARBON FUELS AND OILS |
| Pump Rotation Direction | CLOCKWISE |
| Mounting Type | BASE |
| 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 |
|---|---|
| TB-850 | Schroeder Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 21-2023 | 3/9 Design control — primary reference Sauer-Sundstrand Hydro-Transmission Div |
NSN 4320-01-282-6955 is a Pump,axial Pistons, manufactured by Schroeder Industries Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-282-6955 has 1 manufacturer part number on file: TB-850 (Schroeder Industries Llc).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-285-1803. Verify interchangeability with system specifications before substitution.
Key specifications for TB-850: Pumping Element Type: PISTON; Pumping Element Operating Position: HORIZONTAL; Reciprocating Stroke Type: VARIABLE; Pump Reciprocating Design: SINGLE ACTING. 10 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.