The Valve,vent, cataloged under National Stock Number 4820-01-246-2821, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tate Andale, Llc. Government technical data includes 10 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-246-2821 |
| Primary Part Number | 52-40F-2 1/2IN BRONZE |
| Item Name | Valve,vent |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tate Andale, Llc |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 5.500 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Nominal Outside Diameter | 7.000 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 4 ALL ENDS |
| Material | COPPER ALLOY BODY |
| Nominal Thickness | 0.688 INCHES ALL ENDS IN |
| 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 |
|---|---|
| 52-40F-2 1/2IN BRONZE PRIMARY | Tate Andale, Llc (USA) |
| Reference | Meaning |
|---|---|
| 52-40F-2 1/2IN | C/1 Advisory reference — outside the item-of-supply concept Tate Andale, Llc |
NSN 4820-01-246-2821 is a Valve,vent, manufactured by Tate Andale, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-246-2821 has 1 manufacturer part number on file: 52-40F-2 1/2IN BRONZE (Tate Andale, Llc).
Key specifications for 52-40F-2 1/2IN BRONZE: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 5.500 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS. 10 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.