The Mask,oxygen, cataloged under National Stock Number 1660-01-052-8859, 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 Avox Systems Inc Dba Avox Systems 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-052-8859 |
| Primary Part Number | 651-475-1 |
| Item Name | Mask,oxygen |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Avox Systems Inc Dba Avox Systems Inc |
| Status | ACTIVE |
| Supplementary Features | T.O. 14P3-1-131 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 651-475-1 PRIMARY | Avox Systems Inc Dba Avox Systems Inc (USA) |
NSN 1660-01-052-8859 is a Mask,oxygen, manufactured by Avox Systems Inc Dba Avox Systems Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-052-8859 has 1 manufacturer part number on file: 651-475-1 (Avox Systems Inc Dba Avox Systems Inc).
Key specifications for 651-475-1: Supplementary Features: T.O. 14P3-1-131; Special Features: OXYGEN BREATHING,PRESSURE DEMAND,FULL FACE,GREEN SILICONE ELASTOMERS AND GREEN CLOTH HEAD HARNESS,MICROPHONE W/O HEADSET,SIZE DESIGNATION ADJUSTABLE,PLASTIC FULL FACE LENS,GREEN EPDM TYPE NON-WIRE REINFORCED DELIVERY TUBE WITH 3-PRONG CONNECTOR MATING WITH THE CRU-80/P FILTER PACK,WITH SUN VISOR,DUAL RETENTION STRAPS AND BAYONENT RECEIVERS,FOR USE AS AIRBORNE CHEMICAL-BIOLOGICAL DEFENSE MASK WHEN USING THE HGU-39/P HELMET. 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.
NSN 1660-01-052-8859 has DEMIL Code F. 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.