PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5260001Seat,valve

W S Darley & Co · NSN 4820-01-431-6625 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-431-6625 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-431-6625. Primary manufacturer part number: 5260001.
Features
  • Seat,valve — FSC 4820
  • Material: COPPER ALLOY 360 SEAT
  • 3 verified cross-references
  • Primary manufacturer: W S Darley & Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy 360 Seat construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-431-6625, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is W S Darley & Co. Government technical data includes 1 verified specification, 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-431-6625
Primary Part Number5260001
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerW S Darley & Co
StatusACTIVE
MaterialCOPPER ALLOY 360 SEAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
2910-00-375-4409305353R91 INTERCHANGEABLE
Filter Element,fluid
Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/
Cross-Reference Index
Part NumberManufacturer
A126-1 W S Darley & Co (USA)
B229 REP NO 61 W S Darley & Co (USA)
5260001 PRIMARY W S Darley & Co (USA)
Related Parts
2910-00-375-4409INTERCHANGEABLE
FILTER ELEMENT,FLUID
305353R91

Frequently Asked Questions

What is NSN 4820-01-431-6625?

NSN 4820-01-431-6625 is a Seat,valve, manufactured by W S Darley & Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-431-6625?

NSN 4820-01-431-6625 has 3 cross-referenced part numbers: A126-1 (W S Darley & Co), B229 REP NO 61 (W S Darley & Co), 5260001 (W S Darley & Co).

What NSN replaces 4820-01-431-6625?

There is 1 known substitute for 4820-01-431-6625: 2910-00-375-4409. Verify interchangeability with system specifications before substitution.

What are the specifications of 5260001?

Key specifications for 5260001: End Item Identification: NIMITZ CLASS CVN; Material: COPPER ALLOY 360 SEAT; Special Features: USED ON VALVE,CHECK. 3 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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