The Vent Unit,relief, cataloged under National Stock Number 4930-01-451-6809, is classified within Federal Supply Class 4930 (Lubrication and Fuel Dispensing Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Awi Systems Management Inc. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4930-01-451-6809 |
| Primary Part Number | 62828-90352-2 |
| Item Name | Vent Unit,relief |
| FSC / FSG | 4930 / 49 — Lubrication and Fuel Dispensing Equipment |
| Manufacturer | Awi Systems Management Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 62828-90352-2 PRIMARY | Awi Systems Management Inc (USA) |
| Reference | Meaning |
|---|---|
| 62828-90352-2 | 5/9 Secondary reference U.S. Government activity |
| 31272-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4930-01-451-6809 is a Vent Unit,relief, manufactured by Awi Systems Management Inc, classified under FSC 4930, Lubrication and Fuel Dispensing Equipment. Status: active.
NSN 4930-01-451-6809 has 1 manufacturer part number on file: 62828-90352-2 (Awi Systems Management Inc).
Key specifications for 62828-90352-2: Special Features: STATIC PRESSURE VENT; 5.12 IN W X 3.55 IN H; .750 IPT; ITEM SHALL MINIMIZE THE ERROR OF BAROMETRIC PRESSURE MEASUREMENT DUE TO WIND SPEED; SHALL DELIVER AT ITS OUTPUT MEASUREMENT PORT A REPRESENTATION OF STATIC AMBIENT ATMOSPHERIC PRESSURE ACCURATE WITHIN +/-0.014 IN. HG WHEN EXPOSED TO WIND UP TO 30 KNOTS AT ANY AZIMUTH AND AT NORMAL INCIDENCE IN ELEVATION IN; End Item Identification: AUTOMATED SURFACE OBSERVING SYSTEM (ASOS). 0 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.