The Cock,poppet Drain, cataloged under National Stock Number 4820-01-498-3537, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-498-3537 |
| Primary Part Number | HS6091-1 |
| Item Name | Cock,poppet Drain |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Surface Treatment Document and Classification | MIL-C-5541, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE |
| Minimum Operating Temp | -65.0 FAHRENHEIT DEGF |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | AMS QQ-A-225/6 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | AMS QQ-A-225/9 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | AMS QQ-S-225/6 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 60.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 160.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Material | ALUMINUM ALLOY 2024 BODY |
| Material | ALUMINUM ALLOY FLOW CONTROL DEVICE |
| Material | ALUMINUM ALLOY 2024 SEAT |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| HS6091-1 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 710C8R | 5/2 Secondary reference U.S. Government activity |
| HS6091 | D/9 Drawing number reference only The Boeing Company |
NSN 4820-01-498-3537 is a Cock,poppet Drain, manufactured by The Boeing Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-498-3537 has 1 manufacturer part number on file: HS6091-1 (The Boeing Company).
Key specifications for HS6091-1: Flow Control Device: POPPET; Surface Treatment Document and Classification: MIL-C-5541, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE; Minimum Operating Temp: -65.0 FAHRENHEIT DEGF; Style Designator: STRAIGHT THRU. 14 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.