PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MB254251E PART 6Seat,valve

Hunt Valve Company, Inc. · NSN 4820-01-239-4658 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-239-4658 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-239-4658. Primary manufacturer part number: MB254251E PART 6.
Features
  • Seat,valve — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Hunt Valve Company, Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-239-4658, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hunt Valve Company, Inc.. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSeat,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersHunt Valve Company, Inc. (CAGE 11859); Pima Valve, Llc (CAGE 30263)
Technical Specifications
ParameterValue
NSN4820-01-239-4658
Primary Part NumberMB254251E PART 6
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHunt Valve Company, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4820-01-239-3835MB254251E PART 7 INTERCHANGEABLE
Disk,valve
Hunt Valve Company, Inc.
4810-01-239-89186530 INTERCHANGEABLE
Valve,angle
Hunt Valve Company, Inc.
Cross-Reference Index
Part NumberManufacturer
MB254251E PART 6 PRIMARY Hunt Valve Company, Inc. (USA)
MB254251E PART 6 Pima Valve, Llc (USA)
MB254251E Pima Valve, Llc (USA)
Related Parts
4820-01-239-3835INTERCHANGEABLE
DISK,VALVE
MB254251E PART 7
4810-01-239-8918INTERCHANGEABLE
VALVE,ANGLE
6530

Frequently Asked Questions

What is NSN 4820-01-239-4658?

NSN 4820-01-239-4658 is a Seat,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-239-4658?

NSN 4820-01-239-4658 has 3 cross-referenced part numbers: MB254251E PART 6 (Hunt Valve Company, Inc.), MB254251E PART 6 (Pima Valve, Llc), MB254251E (Pima Valve, Llc).

What NSN replaces 4820-01-239-4658?

There are 2 known substitutes for 4820-01-239-4658: 4820-01-239-3835, 4810-01-239-8918. Verify interchangeability with system specifications before substitution.

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