The Valve Assembly,vent and Drain, cataloged under National Stock Number 4820-01-081-5142, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-081-5142 |
| Item Name | Valve Assembly,vent and Drain |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF VALVE 1; BODY 1; RETAINER 1; RING 2; PLUG 1; O-RING 2; SCREW,PAN HEAD 2; FOR 3 IPS BUTTWELD; 700 PSI MAX WP; TO FUNCTION AS A DRAIN WITH VALVE POSITIONED UP TO 35 DEGREE BELOW HORIZONTAL; TO FUNCTION AS A VENT ASSEMBLY MUST BE INVERTED; VALVE MAY BE POSITIONED UP TO 35 DEGREE ABOVE HORIZONTAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 2621-825-05ASSY | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2621-827-05ASSY | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2621-827-05ASSY151 | 3/2 Design control — primary reference U.S. Government activity |
| 2621-827-05 | D/9 Drawing number reference only U.S. Government activity |
| 262182705-0151 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-081-5142 is a Valve Assembly,vent and Drain, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-081-5142: General Characteristics Item Description: CONSISTS OF VALVE 1; BODY 1; RETAINER 1; RING 2; PLUG 1; O-RING 2; SCREW,PAN HEAD 2; FOR 3 IPS BUTTWELD; 700 PSI MAX WP; TO FUNCTION AS A DRAIN WITH VALVE POSITIONED UP TO 35 DEGREE BELOW HORIZONTAL; TO FUNCTION AS A VENT ASSEMBLY MUST BE INVERTED; VALVE MAY BE POSITIONED UP TO 35 DEGREE ABOVE HORIZONTAL. 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.