The Collar Half Valve, cataloged under National Stock Number 1660-00-452-8464, 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 The Hymatic Engineering Company Limited T/a Honeywell Hymatic. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Collar Half Valve |
| FSC / FSG | 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16) |
| Manufacturers | The Hymatic Engineering Company Limited T/a Honeywell Hymatic (CAGE U1585); Mbda Uk Ltd (CAGE K0967) |
| Parameter | Value |
|---|---|
| NSN | 1660-00-452-8464 |
| Primary Part Number | 100A207745 |
| Item Name | Collar Half Valve |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | The Hymatic Engineering Company Limited T/a Honeywell Hymatic |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 100A207745 | The Hymatic Engineering Company Limited T/a Honeywell Hymatic (GBR) |
| 100A207745 | Mbda Uk Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 100A207745 | 3/9 Design control — primary reference British Aerospace Plc |
| 99-1454985 | 6/9 Informative reference only U.S. Government activity |
NSN 1660-00-452-8464 is a Collar Half Valve, manufactured by The Hymatic Engineering Company Limited T/a Honeywell Hymatic, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-452-8464 has 2 manufacturer part numbers on file: 100A207745 (The Hymatic Engineering Company Limited T/a Honeywell Hymatic), 100A207745 (Mbda Uk Ltd).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1660-00-452-8464 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.