PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

259-00Seat,valve

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-122-3674 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-122-3674 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-122-3674. Primary manufacturer part number: 259-00.
Features
  • Seat,valve — FSC 4820
  • Material: COPPER ALLOY OVERALL
  • 5 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 Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-122-3674, 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 1 verified specification, 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-122-3674
Primary Part Number259-00
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusCANCELLED
MaterialCOPPER ALLOY OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
5360-00-844-2314259-00 INTERCHANGEABLE
Spring,helical,extension
Ampex Data Systems Corporation Dba Ampex Intelligent Systems
5340-01-169-804611954FX INTERCHANGEABLE
Clip,spring Hose
Oshkosh Defense Llc
6685-01-201-798825900 INTERCHANGEABLE
Dampener,fluid Pressure
Kaydon Custom Filtration Corporation
5998-01-224-198725-900 INTERCHANGEABLE
Circuit Card Assembly
Olympus America Inc
5325-01-585-325625900 INTERCHANGEABLE
Insert,screw Thread
Jergens Inc Div Tooling Components Division
Cross-Reference Index
Part NumberManufacturer
40145 PART 259 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40055-04-25 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40055-04 PC 2K Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40145 PIECE 18 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
259-00 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
5360-00-844-2314INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
259-00
5340-01-169-8046INTERCHANGEABLE
CLIP,SPRING HOSE
11954FX
6685-01-201-7988INTERCHANGEABLE
DAMPENER,FLUID PRESSURE
25900
5998-01-224-1987INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
25-900
5325-01-585-3256INTERCHANGEABLE
INSERT,SCREW THREAD
25900

Frequently Asked Questions

What is NSN 4820-01-122-3674?

NSN 4820-01-122-3674 is a Seat,valve, 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 4820-01-122-3674?

NSN 4820-01-122-3674 has 5 cross-referenced part numbers: 40145 PART 259 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40055-04-25 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40055-04 PC 2K (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40145 PIECE 18 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 259-00 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-122-3674?

There are 5 known substitutes for 4820-01-122-3674: 5360-00-844-2314, 5340-01-169-8046, 6685-01-201-7988 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 259-00?

Key specifications for 259-00: Material: COPPER ALLOY OVERALL. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-122-3674 still in active supply?

NSN 4820-01-122-3674 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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