The Cock,plug, cataloged under National Stock Number 4820-01-412-5258, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Staples & Pfeiffer, Inc.. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-412-5258 |
| Primary Part Number | 1520-2 |
| Item Name | Cock,plug |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Staples & Pfeiffer, Inc. |
| Status | ACTIVE |
| Material Document and Classification | QQ-C-390, ALLOY 922 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 175.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 100.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 1520-2 PRIMARY | Staples & Pfeiffer, Inc. (USA) |
| 1545 PIECE 2 | Staples & Pfeiffer, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1545 | D/9 Drawing number reference only Staples & Pfeiffer, Inc. |
| 1545-2 | C/1 Advisory reference — outside the item-of-supply concept Staples & Pfeiffer, Inc. |
NSN 4820-01-412-5258 is a Cock,plug, manufactured by Staples & Pfeiffer, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-412-5258 has 2 manufacturer part numbers on file: 1520-2 (Staples & Pfeiffer, Inc.), 1545 PIECE 2 (Staples & Pfeiffer, Inc.).
Key specifications for 1520-2: Material Document and Classification: QQ-C-390, ALLOY 922 FED SPEC SINGLE MATERIAL RESPONSE BODY; Operating Pressure: 175.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Maximum Operating Temp: 100.0 FAHRENHEIT SINGLE RESPONSE DEGF; Special Features: VALVE SZ 5.000 IN. IN. 5 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.