The Cylinder Assembly,hydraulic Brak, cataloged under National Stock Number 1630-00-112-2602, is classified within Federal Supply Class 1630 (Aircraft Wheel and Brake Systems) of the Aircraft Components and Accessories group. The manufacturer of record is Thomas Instrument, Incorporated. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1630-00-112-2602 |
| Primary Part Number | MC4357-2 |
| Item Name | Cylinder Assembly,hydraulic Brak |
| FSC / FSG | 1630 / 16 — Aircraft Wheel and Brake Systems |
| Manufacturer | Thomas Instrument, Incorporated |
| Status | ACTIVE |
| Mounting Facility Diameter | 4.188 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Mounting Provision Arrangement Style | TWO HOLE |
| Mounting Type and Location | FLANGE CENTER SECTION |
| Mounting Provision | UNTHREADED MOUNTING HOLES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| MC4357-2 PRIMARY | Thomas Instrument, Incorporated (USA) |
| MC4357-2 | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace (USA) |
| Reference | Meaning |
|---|---|
| 6-43903-3 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
| 6-43903-3 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| MC4357-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1630-00-112-2602 is a Cylinder Assembly,hydraulic Brak, manufactured by Thomas Instrument, Incorporated, classified under FSC 1630, Aircraft Wheel and Brake Systems. Status: active.
NSN 1630-00-112-2602 has 2 manufacturer part numbers on file: MC4357-2 (Thomas Instrument, Incorporated), MC4357-2 (Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace).
1 possible match (shared part number, not a government interchangeability claim): 5996-00-610-5570. Verify interchangeability with system specifications before substitution.
Key specifications for MC4357-2: Mounting Facility Diameter: 4.188 INCHES NOMINAL IN; Criticality Code Justification: FEAT; Mounting Provision Arrangement Style: TWO HOLE; Special Features: ITEM IS LANDING GEAR SPECIFIC. 5 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.
NSN 1630-00-112-2602 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.