PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

251-00Cap,valve

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-423-9590 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-423-9590 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-423-9590. Primary manufacturer part number: 251-00.
Features
  • Cap,valve — FSC 4820
  • Valve Type for Which Designed: TEMPERATURE REGULATING
  • Valve Size for Which Designed: 1.500 INCHES IN
  • Attachment Method: THREADED
  • Material: COPPER ALLOY
  • 4 verified cross-references
  • Primary manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy construction
General Description

The Cap,valve, cataloged under National Stock Number 4820-01-423-9590, 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 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 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: Active.

Technical Specifications
ParameterValue
NSN4820-01-423-9590
Primary Part Number251-00
Item NameCap,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Valve Type for Which DesignedTEMPERATURE REGULATING
Valve Size for Which Designed1.500 INCHES IN
Attachment MethodTHREADED
MaterialCOPPER ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5330-00-627-1274400544 INTERCHANGEABLE
Seal
Smiths Detection Inc. Dba Smiths Detection Inc Casc
5315-01-078-8797 INTERCHANGEABLE
Pin
5310-01-168-4484 INTERCHANGEABLE
Nut,plain,extended Washer,double
5930-01-295-84877101KCQE INTERCHANGEABLE
Switch,toggle
C & K Components, Llc Div C & K Components
4820-01-423-961140054-406 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-449-210340054-407 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-512-906340054-409 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-718-656340054-415 INTERCHANGEABLE
Valve,regulating,temperature
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
40054-4 PC 19 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
251 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
251-00 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40054-4 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
5330-00-627-1274INTERCHANGEABLE
SEAL
400544
5315-01-078-8797INTERCHANGEABLE
PIN
5310-01-168-4484INTERCHANGEABLE
NUT,PLAIN,EXTENDED WASHER,DOUBLE
5930-01-295-8487INTERCHANGEABLE
SWITCH,TOGGLE
7101KCQE
4820-01-423-9611INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40054-406
4820-01-449-2103INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40054-407
4820-01-512-9063INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40054-409
4820-01-718-6563INTERCHANGEABLE
VALVE,REGULATING,TEMPERATURE
40054-415

Frequently Asked Questions

What is NSN 4820-01-423-9590?

NSN 4820-01-423-9590 is a Cap,valve, 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 4820-01-423-9590?

NSN 4820-01-423-9590 has 4 cross-referenced part numbers: 40054-4 PC 19 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 251 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 251-00 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40054-4 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-423-9590?

There are 8 known substitutes for 4820-01-423-9590: 5330-00-627-1274, 5315-01-078-8797, 5310-01-168-4484 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 251-00?

Key specifications for 251-00: Valve Type for Which Designed: TEMPERATURE REGULATING; Valve Size for Which Designed: 1.500 INCHES IN; End Item Identification: 170' PATROL COASTAL; Attachment Method: THREADED. 5 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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