The Regulator,thermostatic Temperatu, cataloged under National Stock Number 4820-01-049-1409, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-049-1409
Item Name
Regulator,thermostatic Temperatu
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Bulb Length
12.000 INCHES NOMINAL IN
Bulb Diameter
0.750 INCHES NOMINAL IN
Mounting Method
FLANGE
Valve Size for Which Designed
1.500 INCHES IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6230-01-118-681612SS7565POSSIBLE MATCH
SEARCHLIGHT
Possible match (shared part number)Carlisle & Finch Co
1630-01-121-31405000501POSSIBLE MATCH
PIN,RETURN
Possible match (shared part number)Meggitt Aircraft Braking Systems Corporation
5905-01-276-5489POSSIBLE MATCH
RESISTOR,FIXED,FILM
Possible match (shared part number)
5975-01-546-9426500050-1POSSIBLE MATCH
PANEL,ELECTRICAL-ELECTRONIC EQUI
Possible match (shared part number)Frontier Electronic Systems Corp
4130-01-557-184440-1051POSSIBLE MATCH
FILTERING PAD,AIR COOLER
Possible match (shared part number)Walker Design, Inc. Dba Walker Design Inc Div Walker Engineering Enterprises, Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
40105
D/9Drawing number reference only
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
50005-01
5/9Secondary reference
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
40105-1
3/9Design control — primary reference
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Related Parts
6230-01-118-6816POSSIBLE MATCH
SEARCHLIGHT
12SS7565
1630-01-121-3140POSSIBLE MATCH
PIN,RETURN
5000501
5905-01-276-5489POSSIBLE MATCH
RESISTOR,FIXED,FILM
5975-01-546-9426POSSIBLE MATCH
PANEL,ELECTRICAL-ELECTRONIC EQUI
500050-1
4130-01-557-1844POSSIBLE MATCH
FILTERING PAD,AIR COOLER
40-1051
Frequently Asked Questions
What is NSN 4820-01-049-1409?
NSN 4820-01-049-1409 is a Regulator,thermostatic Temperatu, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-049-1409?
5 possible matches (shared part number, not a government interchangeability claim): 6230-01-118-6816, 1630-01-121-3140, 5905-01-276-5489. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-049-1409?
Key specifications for 4820-01-049-1409: Bulb Length: 12.000 INCHES NOMINAL IN; Bulb Diameter: 0.750 INCHES NOMINAL IN; Mounting Method: FLANGE; Valve Size for Which Designed: 1.500 INCHES IN. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-049-1409 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.