PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66571Valve,regulating,fluid Pressure

Komatsu America Corporation · NSN 4820-01-320-2685 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-320-2685 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-320-2685. Primary manufacturer part number: 66571.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • End Connection Quantity: 2
  • First End Style Designator: FLARED
  • First End Connection Type: THREADED EXTERNAL TUBE
  • Body Style: ANGLE
  • Thread Size and Series/type Designator: 3/8-18 NPT FIRST END
  • Second End Outside Diameter Hose Accommodated: 0.687 INCHES NOMINAL IN
  • Second End Relationship with First End: NOT IDENTICAL
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Body construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-320-2685, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Komatsu America Corporation. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-320-2685
Primary Part Number66571
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerKomatsu America Corporation
StatusACTIVE
End Connection Quantity2
First End Style DesignatorFLARED
First End Connection TypeTHREADED EXTERNAL TUBE
Body StyleANGLE
Thread Size and Series/type Designator3/8-18 NPT FIRST END
Second End Outside Diameter Hose Accommodated0.687 INCHES NOMINAL IN
Second End Relationship with First EndNOT IDENTICAL
Second End Connection TypeUNTHREADED EXTERNAL HOSE
Manual Control MethodTEE HANDLE
Second End Style DesignatorBEADED
FilterNOT INCLUDED
Regulation TypeMANUAL SINGLE STAGE
MaterialSTEEL BODY
Flow Control DevicePISTON, TOP GUIDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4820-00-026-8473009640 INTERCHANGEABLE
Cock,drain
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
2915-00-618-58256-657-1 INTERCHANGEABLE
Valve,dual Shutoff,tank-Mounted
Parker Hannifin Corporation Div Aerospace Group Headquarters
5340-00-703-49246657-1 INTERCHANGEABLE
Boot,dust and Moisture Seal
Triumph Controls, Llc Dba Triumph Controls, Llc
4820-01-253-278752-C-8429-10 INTERCHANGEABLE
Valve,angle
Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba
Cross-Reference Index
Part NumberManufacturer
66571 Komatsu America Corporation (USA)
301803R91 Komatsu American Intl Co (USA)
301803R91 Komatsu America Corp. (USA)
Related Parts
4820-00-026-8473INTERCHANGEABLE
COCK,DRAIN
009640
2915-00-618-5825INTERCHANGEABLE
VALVE,DUAL SHUTOFF,TANK-MOUNTED
6-657-1
5340-00-703-4924INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
6657-1
4820-01-253-2787INTERCHANGEABLE
VALVE,ANGLE
52-C-8429-10

Frequently Asked Questions

What is NSN 4820-01-320-2685?

NSN 4820-01-320-2685 is a Valve,regulating,fluid Pressure, manufactured by Komatsu America Corporation, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-320-2685?

NSN 4820-01-320-2685 has 3 cross-referenced part numbers: 66571 (Komatsu America Corporation), 301803R91 (Komatsu American Intl Co), 301803R91 (Komatsu America Corp.).

What NSN replaces 4820-01-320-2685?

There are 4 known substitutes for 4820-01-320-2685: 4820-00-026-8473, 2915-00-618-5825, 5340-00-703-4924 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 66571?

Key specifications for 66571: End Connection Quantity: 2; First End Style Designator: FLARED; First End Connection Type: THREADED EXTERNAL TUBE; Body Style: ANGLE. 16 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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