PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8245HValve,regulating,fluid Pressure

Ajax Tool Works, Inc. Dba Ajax Tools · NSN 4820-01-203-8539 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-203-8539 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-203-8539. Primary manufacturer part number: 8245H.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Ajax Tool Works, Inc. Dba Ajax Tools
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-203-8539, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ajax Tool Works, Inc. Dba Ajax Tools. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-203-8539
Primary Part Number8245H
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAjax Tool Works, Inc. Dba Ajax Tools
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2825-00-036-33708250 INTERCHANGEABLE
Retainer with Nut
Northrop Grumman Systems Corporation Div Marine Systems
5330-00-154-8358 INTERCHANGEABLE
Seal,plain Encased
5360-00-200-43778253 INTERCHANGEABLE
Spring,helical,compression
Cummins Inc.
6530-00-216-5071 INTERCHANGEABLE
Envelope,sterilization
5330-00-550-64788253 INTERCHANGEABLE
Gasket
Goodrich Corporation
5935-00-615-7833TRU-4020-GSUG INTERCHANGEABLE
Adapter,connector
Winchester Interconnect Rf Corporation
3030-00-844-283315T456 INTERCHANGEABLE
Belt,v
Contitech Usa, Inc Dba Veyance Technologies
4730-01-019-3828838250 INTERCHANGEABLE
Reducer,pipe
Nibco Inc Chemtrol Div
5962-01-138-3375 INTERCHANGEABLE
Microcircuit,digital
5962-01-158-4715 INTERCHANGEABLE
Microcircuit,digital
Cross-Reference Index
Part NumberManufacturer
8245H Ajax Tool Works, Inc. Dba Ajax Tools (USA)
8253 Ajax Tool Works, Inc. Dba Ajax Tools (USA)
Related Parts
2825-00-036-3370INTERCHANGEABLE
RETAINER WITH NUT
8250
5330-00-154-8358INTERCHANGEABLE
SEAL,PLAIN ENCASED
5360-00-200-4377INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
8253
6530-00-216-5071INTERCHANGEABLE
ENVELOPE,STERILIZATION
5330-00-550-6478INTERCHANGEABLE
GASKET
8253
5935-00-615-7833INTERCHANGEABLE
ADAPTER,CONNECTOR
TRU-4020-GSUG
3030-00-844-2833INTERCHANGEABLE
BELT,V
15T456
4730-01-019-3828INTERCHANGEABLE
REDUCER,PIPE
838250
5962-01-138-3375INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5962-01-158-4715INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5340-01-165-5630INTERCHANGEABLE
STANDOFF,THREADED,SPACING
8253
3020-01-432-0958INTERCHANGEABLE
RATCHET WHEEL
741199-K1

Frequently Asked Questions

What is NSN 4820-01-203-8539?

NSN 4820-01-203-8539 is a Valve,regulating,fluid Pressure, manufactured by Ajax Tool Works, Inc. Dba Ajax Tools, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-203-8539?

NSN 4820-01-203-8539 has 2 cross-referenced part numbers: 8245H (Ajax Tool Works, Inc. Dba Ajax Tools), 8253 (Ajax Tool Works, Inc. Dba Ajax Tools).

What NSN replaces 4820-01-203-8539?

There are 12 known substitutes for 4820-01-203-8539: 2825-00-036-3370, 5330-00-154-8358, 5360-00-200-4377 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8245H?

Key specifications for 8245H: Special Features: 2216 PSI AIR TANK. 1 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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