The Thermostatic Assembly,valve, cataloged under National Stock Number 4820-01-156-8304, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. 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. 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 | 4820-01-156-8304 |
| Primary Part Number | 50164-01 |
| Item Name | Thermostatic Assembly,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| General Characteristics Item Description | FOR 1/2 TO 2 IN. SIZE VALVES,55 TO 95 DEG F TEMP RANGE,15 FT ARMORED CAPILLARY TUBE LG,CONSTRUCTED TO SENSE AIR IN |
| 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 |
|---|---|
| 50164-01 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
NSN 4820-01-156-8304 is a Thermostatic Assembly,valve, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-156-8304 has 1 manufacturer part number on file: 50164-01 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 5950-01-188-5497. Verify interchangeability with system specifications before substitution.
Key specifications for 50164-01: General Characteristics Item Description: FOR 1/2 TO 2 IN. SIZE VALVES,55 TO 95 DEG F TEMP RANGE,15 FT ARMORED CAPILLARY TUBE LG,CONSTRUCTED TO SENSE AIR IN. 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.