The Grille,metal, cataloged under National Stock Number 1660-00-705-8319, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-705-8319 |
| Primary Part Number | 537999 |
| Item Name | Grille,metal |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Frame Opening Diameter | 0.250 INCHES MINIMUM IN |
| Shape | ROUND |
| Perforation Shape | SQUARE |
| Frame Type | ROUND |
| Frame Overall Diameter | 0.344 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN |
| Core Type | PERFORATED METAL |
| Frame Overall Thickness | 0.025 INCHES MINIMUM AND 0.045 INCHES MAXIMUM 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 |
|---|---|
| 537999 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| 537999 | Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company (USA) |
| 537999 | Falcon Aerospace, Inc (USA) |
| Reference | Meaning |
|---|---|
| 537999 | 5/1 Secondary reference U.S. Government activity |
NSN 1660-00-705-8319 is a Grille,metal, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-705-8319 has 3 manufacturer part numbers on file: 537999 (Hamilton Sundstrand Corporation Dba Collins Aerospace), 537999 (Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company), 537999 (Falcon Aerospace, Inc).
Key specifications for 537999: Frame Opening Diameter: 0.250 INCHES MINIMUM IN; Shape: ROUND; Perforation Shape: SQUARE; Frame Type: ROUND. 7 specifications are 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.