PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4265-1Disk,valve

Hydrasearch Company, Llc · NSN 4820-01-122-3603 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-122-3603 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-122-3603. Primary manufacturer part number: 4265-1.
Features
  • Disk,valve — FSC 4820
  • Outside Diameter: 1.125 INCHES NOMINAL IN
  • Inside Diameter: 0.812 INCHES NOMINAL IN
  • Style Designator: PLAIN
  • 3 verified cross-references
  • Primary manufacturer: Hydrasearch Company, Llc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Disk,valve, cataloged under National Stock Number 4820-01-122-3603, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hydrasearch Company, Llc. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, 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
NSN4820-01-122-3603
Primary Part Number4265-1
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHydrasearch Company, Llc
StatusACTIVE
Outside Diameter1.125 INCHES NOMINAL IN
Inside Diameter0.812 INCHES NOMINAL IN
Style DesignatorPLAIN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5315-00-021-8211218211 INTERCHANGEABLE
Key,woodruff
Dressta North America Ltd
4730-00-119-053642651 INTERCHANGEABLE
Elbow,tube
Nelson Aero Space, Inc.
6230-00-128-2464M384 INTERCHANGEABLE
Filter,flashlight
Bright Star Industries Inc
2930-00-384-8485 INTERCHANGEABLE
Shroud,fan,radiator
6675-00-551-0420 INTERCHANGEABLE
Stereoscope,lens-Prism-Mirror,ae
6685-00-553-4683130109 INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
Ametek, Inc. Div Aerospace & Defense
4310-01-186-05074265 INTERCHANGEABLE
Valve,reed
Saylor-Beall Manufacturing Company
5315-01-207-7290 INTERCHANGEABLE
Key
5962-01-236-668742651 INTERCHANGEABLE
Microcircuit,memory
Raytheon Company Div Rmd Strategic
5985-01-395-00974265A INTERCHANGEABLE
Antenna
Shakespeare Company, Llc Div Military Electronics
Cross-Reference Index
Part NumberManufacturer
4265 Hydrasearch Co., Inc. Dba Use CAGE Code 32142 for Cataloging (USA)
4265-1 PRIMARY Hydrasearch Company, Llc (USA)
6GN80-1 PIECE 5 Hydrasearch Company, Llc (USA)
Related Parts
5315-00-021-8211INTERCHANGEABLE
KEY,WOODRUFF
218211
4730-00-119-0536INTERCHANGEABLE
ELBOW,TUBE
42651
6230-00-128-2464INTERCHANGEABLE
FILTER,FLASHLIGHT
M384
2930-00-384-8485INTERCHANGEABLE
SHROUD,FAN,RADIATOR
6675-00-551-0420INTERCHANGEABLE
STEREOSCOPE,LENS-PRISM-MIRROR,AE
6685-00-553-4683INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
130109
4310-01-186-0507INTERCHANGEABLE
VALVE,REED
4265
5315-01-207-7290INTERCHANGEABLE
KEY
5962-01-236-6687INTERCHANGEABLE
MICROCIRCUIT,MEMORY
42651
5985-01-395-0097INTERCHANGEABLE
ANTENNA
4265A
5120-01-398-7913INTERCHANGEABLE
SCREWDRIVER ATTACHMENT,SOCKET WR
00942651000
4320-01-422-7158INTERCHANGEABLE
PUMP,CENTRIFUGAL
SNS-4265

Frequently Asked Questions

What is NSN 4820-01-122-3603?

NSN 4820-01-122-3603 is a Disk,valve, manufactured by Hydrasearch Company, Llc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-122-3603?

NSN 4820-01-122-3603 has 3 cross-referenced part numbers: 4265 (Hydrasearch Co., Inc. Dba Use CAGE Code 32142 for Cataloging), 4265-1 (Hydrasearch Company, Llc), 6GN80-1 PIECE 5 (Hydrasearch Company, Llc).

What NSN replaces 4820-01-122-3603?

There are 12 known substitutes for 4820-01-122-3603: 5315-00-021-8211, 4730-00-119-0536, 6230-00-128-2464 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4265-1?

Key specifications for 4265-1: Outside Diameter: 1.125 INCHES NOMINAL IN; Overall Height: 0.250 INCHES NOMINAL IN; Inside Diameter: 0.812 INCHES NOMINAL IN; Style Designator: PLAIN. 4 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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