The Piston,hydraulic Brake, cataloged under National Stock Number 2530-01-331-2997, 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 Meritor Heavy Vehicle Systems, Llc. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2530-01-331-2997 |
| Primary Part Number | 125901016E |
| Item Name | Piston,hydraulic Brake |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | Meritor Heavy Vehicle Systems, Llc |
| Status | ACTIVE |
| Length | 69.8 MILLIMETERS NOMINAL MM |
| Piston Cup | NOT INCLUDED |
| Surface Condition | EXTERNALLY GROOVED |
| Outside Diameter | 35.0 MILLIMETERS NOMINAL MM |
| Steel Insert | NOT INCLUDED |
| Slot Width | 17.0 MILLIMETERS NOMINAL MM |
| Construction Type | ONE-PIECE |
| Groove Width | 3.0 MILLIMETERS NOMINAL MM |
| Shoe Actuating End Type | SLOTTED |
| 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 |
|---|---|
| 2FF765 | Oshkosh Defense Llc (USA) |
| 125901016E PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| 005479T | Kovatch Corp. (USA) |
| Reference | Meaning |
|---|---|
| 2FF765 | 5/9 Secondary reference Oshkosh Corp |
| 2297J4820 | 5/9 Secondary reference Meritor Heavy Vehicle Systems, Llc |
NSN 2530-01-331-2997 is a Piston,hydraulic Brake, manufactured by Meritor Heavy Vehicle Systems, Llc, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-01-331-2997 has 3 manufacturer part numbers on file: 2FF765 (Oshkosh Defense Llc), 125901016E (Meritor Heavy Vehicle Systems, Llc), 005479T (Kovatch Corp.).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-714-3546. Verify interchangeability with system specifications before substitution.
Key specifications for 125901016E: Length: 69.8 MILLIMETERS NOMINAL MM; Piston Cup: NOT INCLUDED; Surface Condition: EXTERNALLY GROOVED; Outside Diameter: 35.0 MILLIMETERS NOMINAL MM. 9 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.