PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40398-901Valve,regulating,fluid Pressure

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-168-1956 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-168-1956 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-168-1956. Primary manufacturer part number: 40398-901.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Material: COPPER ALLOY BODY
  • Second End Relationship with First End: IDENTICAL
  • Outlet Pressure Range: 5.0 TO 60.0 CAMERA MOUNT
  • First End Connection Type: UNTHREADED INTERNAL PIPE
  • First End Style Designator: SOCKET W/BRAZING RING
  • Media for Which Designed: WATER, FRESH
  • Body Style: STRAIGHT THRU
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Body construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-168-1956, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-168-1956
Primary Part Number40398-901
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusCANCELLED
MaterialCOPPER ALLOY BODY
Second End Relationship with First EndIDENTICAL
Outlet Pressure Range5.0 TO 60.0 CAMERA MOUNT
First End Connection TypeUNTHREADED INTERNAL PIPE
First End Style DesignatorSOCKET W/BRAZING RING
Media for Which DesignedWATER, FRESH
Body StyleSTRAIGHT THRU
First End Nominal Pipe Size Accommodated0.750 INCHES IN
Furnished ItemsBRAZING RING
End Connection Quantity2
Valve Loading MethodSPRING
Flow Control DeviceDIAPHRAGM
Regulation TypeAUTOMATIC SINGLE STAGE
Maximum Inlet Pressure RatingERR-060
FilterNOT INCLUDED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
2915-00-798-8538403989 INTERCHANGEABLE
Strip Assembly
Woodward, Inc. Div Fuel Systems and Controls
4820-01-168-1949930-02 INTERCHANGEABLE
Seat,valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-168-2161931-00 INTERCHANGEABLE
Disk,valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-168-2162923 INTERCHANGEABLE
Diaphragm,valve,flat
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
6750-01-427-4090 INTERCHANGEABLE
Film,photographic
4820-01-437-539740398-905 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-474-618640398-911 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-510-303140398-904 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
40398-09 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40398-901 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40398-9 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40398-09 5T30PSI Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40398-09 5T60PS Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
2915-00-798-8538INTERCHANGEABLE
STRIP ASSEMBLY
403989
4820-01-168-1949INTERCHANGEABLE
SEAT,VALVE
930-02
4820-01-168-2161INTERCHANGEABLE
DISK,VALVE
931-00
4820-01-168-2162INTERCHANGEABLE
DIAPHRAGM,VALVE,FLAT
923
6750-01-427-4090INTERCHANGEABLE
FILM,PHOTOGRAPHIC
4820-01-437-5397INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
40398-905
4820-01-474-6186INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
40398-911
4820-01-510-3031INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
40398-904

Frequently Asked Questions

What is NSN 4820-01-168-1956?

NSN 4820-01-168-1956 is a Valve,regulating,fluid Pressure, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-168-1956?

NSN 4820-01-168-1956 has 5 cross-referenced part numbers: 40398-09 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40398-901 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40398-9 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40398-09 5T30PSI (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40398-09 5T60PS (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-168-1956?

There are 8 known substitutes for 4820-01-168-1956: 2915-00-798-8538, 4820-01-168-1949, 4820-01-168-2161 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40398-901?

Key specifications for 40398-901: Material: COPPER ALLOY BODY; Second End Relationship with First End: IDENTICAL; Outlet Pressure Range: 5.0 TO 60.0 CAMERA MOUNT; First End Connection Type: UNTHREADED INTERNAL PIPE. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-168-1956 still in active supply?

NSN 4820-01-168-1956 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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