The Valve,vent-Check, cataloged under National Stock Number 4820-01-171-5068, 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 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-171-5068 |
| Primary Part Number | 52-20S 3IN |
| Item Name | Valve,vent-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tate Andale, Llc |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Nominal Pipe Size Accommodated | 3.000 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Mounting Position | VERTICAL |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material | COPPER ALLOY BODY |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 52-20S 3IN PRIMARY | Tate Andale, Llc (USA) |
| B62 52-20S 3IN | Tate Andale, Llc (USA) |
| 3IN B62-52-20S PRIMARY | Tate Andale, Llc (USA) |
| Reference | Meaning |
|---|---|
| 52-25S 3.0IN | C/1 Advisory reference — outside the item-of-supply concept Tate Andale, Llc |
| 3-140-M20 ASSY 52-25-S 3.0IN | C/1 Advisory reference — outside the item-of-supply concept Tate Andale, Llc |
| 3-140-M20 ASSY 52-25-S 3.OIN | C/1 Advisory reference — outside the item-of-supply concept Tate Andale, Llc |
NSN 4820-01-171-5068 is a Valve,vent-Check, manufactured by Tate Andale, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-171-5068 has 3 manufacturer part numbers on file: 52-20S 3IN (Tate Andale, Llc), B62 52-20S 3IN (Tate Andale, Llc), 3IN B62-52-20S (Tate Andale, Llc).
Key specifications for 52-20S 3IN: Flow Control Device: BALL; Nominal Pipe Size Accommodated: 3.000 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Mounting Position: VERTICAL. 8 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.