The Cock,drain, cataloged under National Stock Number 4820-01-208-1890, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-208-1890 |
| Primary Part Number | 4971B-G503 |
| Item Name | Cock,drain |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories Inc |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 GASKET AND 1 NUT AND 1 TAILPIECE |
| Connection Style | GASKET SEAL (TUBE) FIRST END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.688 INCHES FIRST END IN |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Thread Quantity Per Inch | 16 FIRST END |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | UN FIRST END |
| 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 |
|---|---|
| 4971B-G503 PRIMARY | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| 4971-G503 | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| Reference | Meaning |
|---|---|
| 4820PL0850712 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-01-208-1890 is a Cock,drain, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-208-1890 has 2 manufacturer part numbers on file: 4971B-G503 (Howell Laboratories Inc Dba Howell Laboratories Inc), 4971-G503 (Howell Laboratories Inc Dba Howell Laboratories Inc).
Key specifications for 4971B-G503: Furnished Items and Quantity: 1 GASKET AND 1 NUT AND 1 TAILPIECE; Connection Style: GASKET SEAL (TUBE) FIRST END; Connection Type: THREADED EXTERNAL TUBE FIRST END; Thread Direction: RIGHT-HAND FIRST END. 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.