The Cock,drain, cataloged under National Stock Number 4820-00-272-3345, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dana Off Highway Products, Llc. Government technical data includes 16 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-272-3345 |
| Primary Part Number | 171SB432 |
| Item Name | Cock,drain |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dana Off Highway Products, Llc |
| Status | ACTIVE |
| Flow Control Device | PLUG |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST END IN |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nondefinitive Spec/std Data | 1 TYPE AND A STYLE AND 3 DESIGN |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Thread Quantity Per Inch | 18 FIRST END |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| 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 |
|---|---|
| 171SB432 | Dana Off Highway Products, Llc (USA) |
| 7021-4 | Crane Co Div Valve Div (USA) |
| Reference | Meaning |
|---|---|
| 171SB432 | 5/9 Secondary reference Vme Americas Inc Sub of Vme Group N V |
| SXAIRC0CKTEEHANDLEPLAIN1-4 | 5/9 Secondary reference Essex Brass Corporation |
| MILD1203A | 4/1 Identification reference U.S. Government activity |
| FIG159 | 3/9 Design control — primary reference Lunkenheimer Co |
NSN 4820-00-272-3345 is a Cock,drain, manufactured by Dana Off Highway Products, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-272-3345 has 2 manufacturer part numbers on file: 171SB432 (Dana Off Highway Products, Llc), 7021-4 (Crane Co Div Valve Div).
4 possible matches (shared part number, not a government interchangeability claim): 3020-00-352-6222, 5365-01-419-2969, 4320-01-549-8068. Verify interchangeability with system specifications before substitution.
Key specifications for 171SB432: Flow Control Device: PLUG; Nominal Pipe Size Accommodated: 0.250 INCHES FIRST END IN; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED EXTERNAL PIPE FIRST END. 16 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.