The Valve,vent, cataloged under National Stock Number 4820-01-317-8887, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Morrison Brothers Co Dba Morrison Brothers Co. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-317-8887 |
| Primary Part Number | 153BSS0400AV |
| Item Name | Valve,vent |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Morrison Brothers Co Dba Morrison Brothers Co |
| Status | ACTIVE |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 2.500 INCHES FIRST END IN |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Material | STEEL CORROSION RESISTING BODY |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| 153BSS0400AV PRIMARY | Morrison Brothers Co Dba Morrison Brothers Co (USA) |
| B-4584 | Morrison Brothers Co Dba Morrison Brothers Co (USA) |
| 153-B-SS | Morrison Brothers Co Dba Morrison Brothers Co (USA) |
NSN 4820-01-317-8887 is a Valve,vent, manufactured by Morrison Brothers Co Dba Morrison Brothers Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-317-8887 has 3 manufacturer part numbers on file: 153BSS0400AV (Morrison Brothers Co Dba Morrison Brothers Co), B-4584 (Morrison Brothers Co Dba Morrison Brothers Co), 153-B-SS (Morrison Brothers Co Dba Morrison Brothers Co).
Key specifications for 153BSS0400AV: Connection Type: THREADED INTERNAL PIPE FIRST END; Style Designator: STRAIGHT THRU; Thread Direction: RIGHT-HAND FIRST END; Nominal Thread Size: 2.500 INCHES FIRST END IN. 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.