PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40398-904Valve,regulating,fluid Pressure

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-510-3031 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-510-3031 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-510-3031. Primary manufacturer part number: 40398-904.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Second End Relationship with First End: IDENTICAL
  • First End Connection Type: UNTHREADED INTERNAL PIPE
  • Body Style: STRAIGHT THRU
  • First End Style Designator: SOCKET W/BRAZING RING
  • Flow Control Device: DISK
  • Media for Which Designed: WATER, SALT
  • First End Nominal Pipe Size Accommodated: 0.750 INCHES IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Rubber Butadiene-Acrylonitrile Class Nbr Flow Control Device construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-510-3031, 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 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-510-3031
Primary Part Number40398-904
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Second End Relationship with First EndIDENTICAL
First End Connection TypeUNTHREADED INTERNAL PIPE
Body StyleSTRAIGHT THRU
First End Style DesignatorSOCKET W/BRAZING RING
Flow Control DeviceDISK
Media for Which DesignedWATER, SALT
First End Nominal Pipe Size Accommodated0.750 INCHES IN
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE
Outlet Pressure Range50.0 TO 150.0 CAMERA MOUNT
Regulation TypeMANUAL SINGLE STAGE
MaterialCOPPER ALLOY BODY
End Connection Quantity2
Maximum Inlet Pressure RatingERR-060
Manual Control MethodSCREW
Valve Loading MethodSPRING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
2915-00-798-8538403989 INTERCHANGEABLE
Strip Assembly
Woodward, Inc. Div Fuel Systems and Controls
4820-01-168-195640398-901 INTERCHANGEABLE
Valve,regulating,fluid Pressure
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
Cross-Reference Index
Part NumberManufacturer
40398-9 ASSY 40398-904 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40398-9 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40398-904 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
2915-00-798-8538INTERCHANGEABLE
STRIP ASSEMBLY
403989
4820-01-168-1956INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
40398-901
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

Frequently Asked Questions

What is NSN 4820-01-510-3031?

NSN 4820-01-510-3031 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: active.

What are the part numbers for NSN 4820-01-510-3031?

NSN 4820-01-510-3031 has 3 cross-referenced part numbers: 40398-9 ASSY 40398-904 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40398-9 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40398-904 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-510-3031?

There are 5 known substitutes for 4820-01-510-3031: 2915-00-798-8538, 4820-01-168-1956, 6750-01-427-4090 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40398-904?

Key specifications for 40398-904: Second End Relationship with First End: IDENTICAL; First End Connection Type: UNTHREADED INTERNAL PIPE; Body Style: STRAIGHT THRU; First End Style Designator: SOCKET W/BRAZING RING. 16 total characteristics are documented in the Federal Logistics Information System.

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