The Cock,drain, cataloged under National Stock Number 4820-01-102-9950, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-102-9950 |
| Primary Part Number | 4HB990 |
| Item Name | Cock,drain |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Thread Series Designator | NPT 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 |
|---|---|
| 4HB990 | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 6600162 | 3/2 Design control — primary reference U.S. Government activity |
| 4HB990 | 5/9 Secondary reference Oshkosh Corp |
NSN 4820-01-102-9950 is a Cock,drain, manufactured by Oshkosh Defense Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-102-9950 has 1 manufacturer part number on file: 4HB990 (Oshkosh Defense Llc).
Key specifications for 4HB990: Nominal Thread Size: 0.250 INCHES FIRST END IN; End Item Identification: 3990-01-440-6174 BITUM DISTRIBUTOR; Thread Series Designator: NPT FIRST END; Valve Operation Method: MANUAL. 3 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.