PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4743A PIECE 2Disk,valve

Howell Laboratories Inc Dba Howell Laboratories Inc · NSN 4820-01-091-3126 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-091-3126 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-091-3126. Primary manufacturer part number: 4743A PIECE 2.
Features
  • Disk,valve — FSC 4820
  • Outside Diameter: 1.094 INCHES NOMINAL IN
  • Media for Which Designed: AIR
  • Material: PLASTIC ACETAL
  • Inside Diameter: 0.375 INCHES NOMINAL IN
  • Style Designator: PLAIN
  • 4 verified cross-references
  • Primary manufacturer: Howell Laboratories Inc Dba Howell Laboratories Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Plastic Acetal construction
General Description

The Disk,valve, cataloged under National Stock Number 4820-01-091-3126, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 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
NSN4820-01-091-3126
Primary Part Number4743A PIECE 2
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHowell Laboratories Inc Dba Howell Laboratories Inc
StatusACTIVE
Outside Diameter1.094 INCHES NOMINAL IN
Media for Which DesignedAIR
MaterialPLASTIC ACETAL
Inside Diameter0.375 INCHES NOMINAL IN
Style DesignatorPLAIN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5365-00-126-42227034 INTERCHANGEABLE
Bushing
Telemechanics Inc
5945-00-188-5637SCC42045 INTERCHANGEABLE
Relay,electromagnetic
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
2805-00-422-932013S24 INTERCHANGEABLE
Ring Set,piston
Spirolox Inc
4820-00-446-2764 INTERCHANGEABLE
Valve,globe
4920-00-537-25327034 INTERCHANGEABLE
Calibration Test St
James a. Staley Co., Inc. Dba James a Staley Co
5325-00-829-194911-292 INTERCHANGEABLE
Grommet,nonmetallic
Gc/waldom Inc
5950-00-864-5485575R590H34 INTERCHANGEABLE
Coil,radio Frequency
Westinghouse Electric Corp
6220-00-880-692150352 INTERCHANGEABLE
Stop Light-Taillight,vehicular
Grote Industries Inc Dba Grote Manufacturing Co Div Military Products
5995-00-926-34897034 INTERCHANGEABLE
Cable Assembly,radio Frequency
Spencer Industries Inc
5960-00-985-9059 INTERCHANGEABLE
Electron Tube
Cross-Reference Index
Part NumberManufacturer
70-3-4 Lunkenheimer Co (USA)
4743A PIECE 2 PRIMARY Howell Laboratories Inc Dba Howell Laboratories Inc (USA)
4743B-2 Howell Laboratories Inc Dba Howell Laboratories Inc (USA)
306365V10 Lunkenheimer Co (USA)
Related Parts
5365-00-126-4222INTERCHANGEABLE
BUSHING
7034
5945-00-188-5637INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
SCC42045
2805-00-422-9320INTERCHANGEABLE
RING SET,PISTON
13S24
4820-00-446-2764INTERCHANGEABLE
VALVE,GLOBE
4920-00-537-2532INTERCHANGEABLE
CALIBRATION TEST ST
7034
5325-00-829-1949INTERCHANGEABLE
GROMMET,NONMETALLIC
11-292
5950-00-864-5485INTERCHANGEABLE
COIL,RADIO FREQUENCY
575R590H34
6220-00-880-6921INTERCHANGEABLE
STOP LIGHT-TAILLIGHT,VEHICULAR
50352
5995-00-926-3489INTERCHANGEABLE
CABLE ASSEMBLY,RADIO FREQUENCY
7034
5960-00-985-9059INTERCHANGEABLE
ELECTRON TUBE
2530-01-165-8078INTERCHANGEABLE
ROTOR ASSEMBLY,DISC BRAKE
BD60472
5120-01-363-6699INTERCHANGEABLE
EXTRACTOR,VALVE
Z7034

Frequently Asked Questions

What is NSN 4820-01-091-3126?

NSN 4820-01-091-3126 is a Disk,valve, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-091-3126?

NSN 4820-01-091-3126 has 4 cross-referenced part numbers: 70-3-4 (Lunkenheimer Co), 4743A PIECE 2 (Howell Laboratories Inc Dba Howell Laboratories Inc), 4743B-2 (Howell Laboratories Inc Dba Howell Laboratories Inc), 306365V10 (Lunkenheimer Co).

What NSN replaces 4820-01-091-3126?

There are 12 known substitutes for 4820-01-091-3126: 5365-00-126-4222, 5945-00-188-5637, 2805-00-422-9320 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4743A PIECE 2?

Key specifications for 4743A PIECE 2: Overall Height: 0.250 INCHES NOMINAL IN; Outside Diameter: 1.094 INCHES NOMINAL IN; Media for Which Designed: AIR; Material: PLASTIC ACETAL. 6 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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