The Cylinder Assembly,hydraulic Brak, cataloged under National Stock Number 2530-01-331-6687, is classified within Federal Supply Class 2530 (Vehicular Brake, Steering, Axle, Wheel, and Track Components) of the Vehicular Equipment Components group. The manufacturer of record is Ppm Cranes Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2530-01-331-6687 |
| Primary Part Number | 38U57D2 |
| Item Name | Cylinder Assembly,hydraulic Brak |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | Ppm Cranes Inc |
| Status | ACTIVE |
| Port Location and Quantity | 2 CYLINDER HEAD END |
| Mounting Type and Location | FLANGE CYLINDER HEAD END |
| Reservoir Type | INTEGRAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 38U57D2 PRIMARY | Ppm Cranes Inc (USA) |
| Reference | Meaning |
|---|---|
| 38U5702 | 5/9 Secondary reference Ppm Cranes Inc |
| 38U57D2 | 5/9 Secondary reference Southeastern Equipment Co Inc |
| 38U5702 | 5/9 Secondary reference Southeastern Equipment Co Inc |
| 38U5702 | 5/9 Secondary reference Morris Material Handling, Inc. |
NSN 2530-01-331-6687 is a Cylinder Assembly,hydraulic Brak, manufactured by Ppm Cranes Inc, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-01-331-6687 has 1 manufacturer part number on file: 38U57D2 (Ppm Cranes Inc).
Key specifications for 38U57D2: Port Location and Quantity: 2 CYLINDER HEAD END; End Item Identification: HARNISCHFEGER CORP,CRANE,WHEEL MOUNTED,MODEL OMEGA 25; Mounting Type and Location: FLANGE CYLINDER HEAD END; Reservoir Type: INTEGRAL. 3 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.