The Cock,drain, cataloged under National Stock Number 4820-00-236-2609, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mack Trucks Inc Parts Opn. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-236-2609 |
| Primary Part Number | 61AX121 |
| Item Name | Cock,drain |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mack Trucks Inc Parts Opn |
| Status | ACTIVE |
| Flow Control Device | NEEDLE |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.375 INCHES FIRST END IN |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 61AX121 PRIMARY | Mack Trucks Inc Parts Opn (USA) |
| Reference | Meaning |
|---|---|
| 61AX54 | 5/9 Secondary reference Mack Trucks Inc Parts Opn |
NSN 4820-00-236-2609 is a Cock,drain, manufactured by Mack Trucks Inc Parts Opn, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-236-2609 has 1 manufacturer part number on file: 61AX121 (Mack Trucks Inc Parts Opn).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-561-1829. Verify interchangeability with system specifications before substitution.
Key specifications for 61AX121: Flow Control Device: NEEDLE; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED EXTERNAL PIPE FIRST END; Style Designator: STRAIGHT THRU. 9 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.