The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-508-8912, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-508-8912 |
| Primary Part Number | 40081-803 |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| Temp Rating | 55.0 FAHRENHEIT MAXIMUM AND 85.0 FAHRENHEIT MAXIMUM DEGF |
| 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 |
|---|---|
| 40081-803 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 40081-8 | D/9 Drawing number reference only Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| 40081-8 REVA ASSY 40081-803 | 5/9 Secondary reference Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
NSN 4820-01-508-8912 is a Valve,regulating,temperature, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-508-8912 has 1 manufacturer part number on file: 40081-803 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-508-8913. Verify interchangeability with system specifications before substitution.
Key specifications for 40081-803: Temp Rating: 55.0 FAHRENHEIT MAXIMUM AND 85.0 FAHRENHEIT MAXIMUM DEGF; Special Features: BRONZE BODY W/SOCKET WELD UNION ENDS WITH CRES 304 TAIL PIECES, BRONZE TRIM FAILSAFE CONSTRUCTION 1-1/8IN X 12IN COPPER BULB BRASS ARMORED CAPILLARY; ADJUSTABLE TEMPERATURE RANGE 55-85DEGREE FAHRENHEIT 1-1/2IN CRES BULB BUSHING IN; Part Name Assigned by Controlling Agency: 3/4IN TRAC STYLE "A" 3-WAY THERMOSTATIC TEMP REG VALVE ASSEMBLY IN; End Item Identification: VALVE, REGULATING, TEMPERATURE. 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.