NSN 4820-00-540-8522 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-540-8522. Manufacturer of record part number: 40043-801.
Manufacturer of record: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Identification
NSN: 4820-00-540-8522
NIIN: 005408522
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 40043-801
Manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
General Description
The Valve,regulating,temperature, cataloged under National Stock Number 4820-00-540-8522, 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. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-540-8522
Primary Part Number
40043-801
Item Name
Valve,regulating,temperature
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL Q — CCL Item — Commerce Control List
Hazard
Hazardous per DLA record (HMIC Y)
Criticality Code
X
⇄Related Items9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6105-00-670-262640043POSSIBLE MATCH
STIRRUP,BRUSH HOLDER
Possible match (shared part number)Mas Components & Coatings, Llc Dba Mas Components & Coatings Llc
5950-00-794-29502064468POSSIBLE MATCH
COIL,RADIO FREQUENCY
Possible match (shared part number)L3harris Technologies, Inc.
4820-01-023-7757855456-1POSSIBLE MATCH
VALVE,REGULATING,TEMPERATURE
Possible match (shared part number)Raytheon Company Div Corp
4720-01-079-1686POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)
4820-01-143-2864POSSIBLE MATCH
VALVE,REGULATING,TEMPERATURE
Possible match (shared part number)
5961-01-177-5340353-3623-012POSSIBLE MATCH
SEMICONDUCTOR DEVICE,DIODE
Possible match (shared part number)Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
4820-01-183-233625TE-N-2 INCHPOSSIBLE MATCH
VALVE,REGULATING,TEMPERATURE
Possible match (shared part number)Spirax Sarco Inc Dba Spirax Sarco
5120-01-343-7634POSSIBLE MATCH
LOCATOR
Possible match (shared part number)
8465-01-541-830340043POSSIBLE MATCH
HYDRATION SYSTEM
Possible match (shared part number)Camelbak Products, Llc Dba Camelbak
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Reference documents
Reference
Meaning
40043
5/9Secondary reference
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
MILV19772
5/9Secondary reference
U.S. Government activity
MIL-DTL-19772
4/1Identification reference
U.S. Government activity
MIL-DTL-19772B
5/9Secondary reference
U.S. Government activity
SFS-05-1.25(140-160)
3/1Design control — primary reference
Lawler Manufacturing Company, Inc.
SFSBALANCEDTYPE
5/9Secondary reference
Lawler Manufacturing Company, Inc.
Related Parts
6105-00-670-2626POSSIBLE MATCH
STIRRUP,BRUSH HOLDER
40043
5950-00-794-2950POSSIBLE MATCH
COIL,RADIO FREQUENCY
2064468
4820-01-023-7757POSSIBLE MATCH
VALVE,REGULATING,TEMPERATURE
855456-1
4720-01-079-1686POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
4820-01-143-2864POSSIBLE MATCH
VALVE,REGULATING,TEMPERATURE
5961-01-177-5340POSSIBLE MATCH
SEMICONDUCTOR DEVICE,DIODE
353-3623-012
4820-01-183-2336POSSIBLE MATCH
VALVE,REGULATING,TEMPERATURE
25TE-N-2 INCH
5120-01-343-7634POSSIBLE MATCH
LOCATOR
8465-01-541-8303POSSIBLE MATCH
HYDRATION SYSTEM
40043
Frequently Asked Questions
What is NSN 4820-00-540-8522?
NSN 4820-00-540-8522 is a Valve,regulating,temperature, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-540-8522?
NSN 4820-00-540-8522 has 1 manufacturer part number on file: 40043-801 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
What NSN replaces 4820-00-540-8522?
9 possible matches (shared part number, not a government interchangeability claim): 6105-00-670-2626, 5950-00-794-2950, 4820-01-023-7757. Verify interchangeability with system specifications before substitution.
What are the specifications of 40043-801?
Key specifications for 40043-801: Special Features: 1 1/4 IN. SILBRAZED UNION ENDS 140 DEG TO 160 DEG F TEMP RANGE TUBE LG 10 FT IN. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-540-8522 hazardous material?
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
What is the DEMIL code for NSN 4820-00-540-8522?
NSN 4820-00-540-8522 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.