The Valve,modulator, cataloged under National Stock Number 4820-01-139-3971, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-139-3971 |
| Primary Part Number | 12288173 |
| Item Name | Valve,modulator |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | ASSEMBLY CONSIST OF 1 SPRING FSCM19207 P/N 1226717; 1 VALVE FSCM 19207 P/N 12288176; 1 VALVE FSCM 19207 P/N 12267965; 1 VALVE BODY FSCM 19207 P/N 12267112; 1 VALVE ASSEMBLY FSCM 19207 P/N 12267928; 1 RING FSCM 19207 P/N 12288175; 1 ROLLER FSCM 19207 P/N 11669542;1 SPRING FSCM 19207 P/N 12267977; 1 BRACKET FSCM 19207 P/N 12288019; 2 WASHERS FSCM 19207 P/N 8356625; 2 BOLTS FSCM 24617 P/N 9409073 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| 12288173 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 4820-01-139-3971 is a Valve,modulator, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-139-3971 has 1 manufacturer part number on file: 12288173 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12288173: General Characteristics Item Description: ASSEMBLY CONSIST OF 1 SPRING FSCM19207 P/N 1226717; 1 VALVE FSCM 19207 P/N 12288176; 1 VALVE FSCM 19207 P/N 12267965; 1 VALVE BODY FSCM 19207 P/N 12267112; 1 VALVE ASSEMBLY FSCM 19207 P/N 12267928; 1 RING FSCM 19207 P/N 12288175; 1 ROLLER FSCM 19207 P/N 11669542;1 SPRING FSCM 19207 P/N 12267977; 1 BRACKET FSCM 19207 P/N 12288019; 2 WASHERS FSCM 19207 P/N 8356625; 2 BOLTS FSCM 24617 P/N 9409073; End Item Identification: 2520011361191. 1 specification is 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.