PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

22791Valve,pneumatic Tank

Alter Harry Co the Div of T E C · NSN 4820-00-493-6999 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-493-6999 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-493-6999. Primary manufacturer part number: 22791.
Features
  • Valve,pneumatic Tank — FSC 4820
  • Media for Which Designed: AIR
  • End Connection Quantity: 2
  • Material: COPPER ALLOY SEAT
  • Second End Outside Diameter Tube Accommodated: 0.375 INCHES NOMINAL IN
  • Material: COPPER ALLOY BODY
  • First End Outside Diameter Tube Accommodated: 0.250 INCHES NOMINAL IN
  • First End Connection Type: THREADED EXTERNAL TUBE
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Seat construction
General Description

The Valve,pneumatic Tank, cataloged under National Stock Number 4820-00-493-6999, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Alter Harry Co the Div of T E C. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-493-6999
Primary Part Number22791
Item NameValve,pneumatic Tank
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAlter Harry Co the Div of T E C
StatusACTIVE
Media for Which DesignedAIR
End Connection Quantity2
MaterialCOPPER ALLOY SEAT
Second End Outside Diameter Tube Accommodated0.375 INCHES NOMINAL IN
MaterialCOPPER ALLOY BODY
First End Outside Diameter Tube Accommodated0.250 INCHES NOMINAL IN
First End Connection TypeTHREADED EXTERNAL TUBE
Flow Control DeviceCORE
Second End Connection TypeUNTHREADED INTERNAL TUBE
MaterialSTEEL CORROSION RESISTING STEM
Second End Style DesignatorSOCKET
First End Seat Angle in Deg37.0
Commercial Spring Tension RatingMEDIUM
First End Thread Class3A A
Body StyleSTRAIGHT THRU
Commercial Core Length DesignatorSHORT
First End Style DesignatorFLARED
MaterialCOPPER ALLOY FLOW CONTROL DEVICE
First End Thread DirectionRIGHT-HAND
Second End Relationship with First EndNOT IDENTICAL
Furnished ItemsCAP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
3110-00-120-316922791 INTERCHANGEABLE
Bearing,roller,needle
Renk America Llc Div Renk America
2920-00-397-31802871170 INTERCHANGEABLE
Generator,engine Accessory
Perkins Engines Inc
5985-00-710-5040 INTERCHANGEABLE
Antenna
9310-01-083-521022791 INTERCHANGEABLE
Paper,cover
3 Star Papers Ltd Dba Limited Papers Div Limited Papers
5975-01-394-51182279-1 INTERCHANGEABLE
Mounting Base,electrical Equipme
Hutchinson Aerospace & Industry, Inc. Dba Barry Wright Corp
6320-01-478-523422791 INTERCHANGEABLE
Panel,alarm,shipboard
Electronic Marine Systems, Inc.
4940-01-618-0118 INTERCHANGEABLE
Leak Detector,refrigerant Gas
Cross-Reference Index
Part NumberManufacturer
22791 PRIMARY Alter Harry Co the Div of T E C (USA)
Related Parts
3110-00-120-3169INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
22791
2920-00-397-3180INTERCHANGEABLE
GENERATOR,ENGINE ACCESSORY
2871170
5985-00-710-5040INTERCHANGEABLE
ANTENNA
9310-01-083-5210INTERCHANGEABLE
PAPER,COVER
22791
5975-01-394-5118INTERCHANGEABLE
MOUNTING BASE,ELECTRICAL EQUIPME
2279-1
6320-01-478-5234INTERCHANGEABLE
PANEL,ALARM,SHIPBOARD
22791
4940-01-618-0118INTERCHANGEABLE
LEAK DETECTOR,REFRIGERANT GAS

Frequently Asked Questions

What is NSN 4820-00-493-6999?

NSN 4820-00-493-6999 is a Valve,pneumatic Tank, manufactured by Alter Harry Co the Div of T E C, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-493-6999?

NSN 4820-00-493-6999 has 1 cross-referenced part number: 22791 (Alter Harry Co the Div of T E C).

What NSN replaces 4820-00-493-6999?

There are 7 known substitutes for 4820-00-493-6999: 3110-00-120-3169, 2920-00-397-3180, 5985-00-710-5040 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 22791?

Key specifications for 22791: Media for Which Designed: AIR; End Connection Quantity: 2; Material: COPPER ALLOY SEAT; Second End Outside Diameter Tube Accommodated: 0.375 INCHES NOMINAL IN. 21 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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