The Disc,brake, cataloged under National Stock Number 1630-00-229-0866, is classified within Federal Supply Class 1630 (Aircraft Wheel and Brake Systems) of the Aircraft Components and Accessories group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1630-00-229-0866 |
| Primary Part Number | 531775-4 |
| Item Name | Disc,brake |
| FSC / FSG | 1630 / 16 — Aircraft Wheel and Brake Systems |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Overall Diameter | 2.480 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 4130 COMPOSITION |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 531775-4 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 531775-4 | 5/9 Secondary reference Honeywell International Inc. Div Aerospace - Torrance |
NSN 1630-00-229-0866 is a Disc,brake, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 1630, Aircraft Wheel and Brake Systems. Status: active.
NSN 1630-00-229-0866 has 1 manufacturer part number on file: 531775-4 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
Key specifications for 531775-4: Overall Height: 0.060 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN; Overall Diameter: 2.480 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN; Nondefinitive Spec/std Data: 4130 COMPOSITION; Special Features: ID 1.250 TO 1.255, MAJOR DIAM 1.375 TO 1.386, 21 TEETH. 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.
NSN 1630-00-229-0866 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.