PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AC1Valve,plug

Circor Naval Solutions Llc Dba Warren Pumps · NSN 4820-01-145-0442 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-145-0442 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-145-0442. Primary manufacturer part number: AC1.
Features
  • Valve,plug — FSC 4820
  • Material Document and Classification: MIL-N-20164 MIL SPEC SINGLE MATERIAL RESPONSE BODY
  • Material: NICKEL ALLOY BODY
  • 3 verified cross-references
  • Primary manufacturer: Circor Naval Solutions Llc Dba Warren Pumps
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy Body construction
General Description

The Valve,plug, cataloged under National Stock Number 4820-01-145-0442, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. Government technical data includes 2 verified specifications, 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-145-0442
Primary Part NumberAC1
Item NameValve,plug
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCircor Naval Solutions Llc Dba Warren Pumps
StatusACTIVE
Material Document and ClassificationMIL-N-20164 MIL SPEC SINGLE MATERIAL RESPONSE BODY
MaterialNICKEL ALLOY BODY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5999-00-593-6535 INTERCHANGEABLE
Clip,electrical
5940-00-626-76535060-0633 INTERCHANGEABLE
Post,binding,electrical
Keysight Technologies Inc
5999-00-979-5911400094-2 INTERCHANGEABLE
Clip,electrical
Aimtron Systems, Llc
2815-01-111-2208AC1 INTERCHANGEABLE
Engine,diesel
Lister Petter Americas Incorporated
4320-01-145-0476BC11 INTERCHANGEABLE
Cover,hydraulic,pump-Motor
Circor Naval Solutions Llc Dba Warren Pumps
6130-01-225-9547AC-1 INTERCHANGEABLE
Adapter,power Supply
Advanced Electronic Applications Inc
5920-01-252-7776255001 INTERCHANGEABLE
Fuse,cartridge
Littelfuse, Inc.
2910-01-358-7188AC1 INTERCHANGEABLE
Idler,control Valve
Standard Motor Products
6110-01-442-1070AC-1 INTERCHANGEABLE
Panel,power Distribution
Roi Development Corp. Dba Newmar
6130-01-539-3333 INTERCHANGEABLE
Charger,battery
Cross-Reference Index
Part NumberManufacturer
AC1 PRIMARY Circor Naval Solutions Llc Dba Warren Pumps (USA)
R-495 Circor Naval Solutions Llc Dba Warren Pumps (USA)
R-495 PIECE 46 Circor Naval Solutions Llc Dba Warren Pumps (USA)
Related Parts
5999-00-593-6535INTERCHANGEABLE
CLIP,ELECTRICAL
5940-00-626-7653INTERCHANGEABLE
POST,BINDING,ELECTRICAL
5060-0633
5999-00-979-5911INTERCHANGEABLE
CLIP,ELECTRICAL
400094-2
2815-01-111-2208INTERCHANGEABLE
ENGINE,DIESEL
AC1
4320-01-145-0476INTERCHANGEABLE
COVER,HYDRAULIC,PUMP-MOTOR
BC11
6130-01-225-9547INTERCHANGEABLE
ADAPTER,POWER SUPPLY
AC-1
5920-01-252-7776INTERCHANGEABLE
FUSE,CARTRIDGE
255001
2910-01-358-7188INTERCHANGEABLE
IDLER,CONTROL VALVE
AC1
6110-01-442-1070INTERCHANGEABLE
PANEL,POWER DISTRIBUTION
AC-1
6130-01-539-3333INTERCHANGEABLE
CHARGER,BATTERY
5340-01-657-9640INTERCHANGEABLE
CLIP,SPRING TENSION
AC1

Frequently Asked Questions

What is NSN 4820-01-145-0442?

NSN 4820-01-145-0442 is a Valve,plug, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-145-0442?

NSN 4820-01-145-0442 has 3 cross-referenced part numbers: AC1 (Circor Naval Solutions Llc Dba Warren Pumps), R-495 (Circor Naval Solutions Llc Dba Warren Pumps), R-495 PIECE 46 (Circor Naval Solutions Llc Dba Warren Pumps).

What NSN replaces 4820-01-145-0442?

There are 11 known substitutes for 4820-01-145-0442: 5999-00-593-6535, 5940-00-626-7653, 5999-00-979-5911 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AC1?

Key specifications for AC1: Material Document and Classification: MIL-N-20164 MIL SPEC SINGLE MATERIAL RESPONSE BODY; Material: NICKEL ALLOY BODY. 2 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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