The Restrictor,cooling Air, cataloged under National Stock Number 2935-01-226-9733, is classified within Federal Supply Class 2935 (Engine System Cooling Components, Aircraft Prime Moving) of the Engine Accessories group. The manufacturer of record is Trico Manufacturing Inc.. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2935-01-226-9733 |
| Primary Part Number | 4M307-4-36 |
| Item Name | Restrictor,cooling Air |
| FSC / FSG | 2935 / 29 — Engine System Cooling Components, Aircraft Prime Moving |
| Manufacturer | Trico Manufacturing Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY,6061-T6 PER QQ-A-250/11,COND T6; CHROMATE PER MIL-C-5541,CL3; OD 1.609 IN.; 0.562 IN. ID; 0.023 IN. MIN,0.027 IN. MAX THK IN |
| 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 |
|---|---|
| 4M307-4-36 | Trico Manufacturing Inc. (USA) |
| Reference | Meaning |
|---|---|
| 4M307-4-36 | 3/9 Design control — primary reference Ford Motor Company |
| 4M307-4-36 | 5/9 Secondary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
| 4M307-4-36 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 2935-01-226-9733 is a Restrictor,cooling Air, manufactured by Trico Manufacturing Inc., classified under FSC 2935, Engine System Cooling Components, Aircraft Prime Moving. Status: active.
NSN 2935-01-226-9733 has 1 manufacturer part number on file: 4M307-4-36 (Trico Manufacturing Inc.).
Key specifications for 4M307-4-36: General Characteristics Item Description: ALUMINUM ALLOY,6061-T6 PER QQ-A-250/11,COND T6; CHROMATE PER MIL-C-5541,CL3; OD 1.609 IN.; 0.562 IN. ID; 0.023 IN. MIN,0.027 IN. MAX THK IN. 1 specification is 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.