PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

399Valve,vacuum Regulating

Airtech International Inc Dba Airtech International Inc · NSN 4820-01-509-1400 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-509-1400 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-509-1400. Primary manufacturer part number: 399.
Features
  • Valve,vacuum Regulating — FSC 4820
  • Body Material: ALUMINUM
  • Body Style: SINGLE CONNECTION, STRAIGHT FLOW
  • First End Style Designator: PLAIN
  • First End Inside Diameter Hose Accommodated: 0.250 INCHES NOMINAL IN
  • Furnished Items: GASKET
  • Temp Rating: 500.0 FAHRENHEIT DEGF
  • End Connection Quantity: 1
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,vacuum Regulating, cataloged under National Stock Number 4820-01-509-1400, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Airtech International Inc Dba Airtech International Inc. Government technical data includes 11 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-509-1400
Primary Part Number399
Item NameValve,vacuum Regulating
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAirtech International Inc Dba Airtech International Inc
StatusACTIVE
Body MaterialALUMINUM
Body StyleSINGLE CONNECTION, STRAIGHT FLOW
First End Style DesignatorPLAIN
First End Inside Diameter Hose Accommodated0.250 INCHES NOMINAL IN
Furnished ItemsGASKET
Temp Rating500.0 FAHRENHEIT DEGF
End Connection Quantity1
First End Thread Series DesignatorNPT
Temp AdjustabilityNOT ADJUSTABLE
Media for Which DesignedAIR
Supplementary FeaturesDESIGNED TO WORK W/ AIR TECH AQD 500TF QUICK DISCONNECT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4935-00-065-2977399 INTERCHANGEABLE
Arm,writing
Philips North America Llc Dba Philips Healthcare
5110-00-083-004221-399 INTERCHANGEABLE
Rasp,hand
Stanley Tools Div of Stanley Works
3030-00-103-230317691 INTERCHANGEABLE
Belt,v
Contitech Usa, Inc Dba Veyance Technologies
5935-00-201-7179399 INTERCHANGEABLE
Jack,tip
Birnbach Co Inc
5935-00-284-3922399 INTERCHANGEABLE
Jack,telephone
L3harris Technologies, Inc. Dba Harris Corporation
6220-00-472-4166915119 INTERCHANGEABLE
Light,marker,clearance
General Motors Llc Dba General Motors Llc
5985-00-504-7776AT153U INTERCHANGEABLE
Horn,waveguide
Joint Electronics Type Designation System
5950-00-536-3990 INTERCHANGEABLE
Core
6240-00-865-32571399 INTERCHANGEABLE
Lamp,incandescent
Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch
3110-01-212-4720S0399 INTERCHANGEABLE
Bearing,ball,annular
Lowensten W W
Cross-Reference Index
Part NumberManufacturer
399 PRIMARY Airtech International Inc Dba Airtech International Inc (USA)
Related Parts
4935-00-065-2977INTERCHANGEABLE
ARM,WRITING
399
5110-00-083-0042INTERCHANGEABLE
RASP,HAND
21-399
3030-00-103-2303INTERCHANGEABLE
BELT,V
17691
5935-00-201-7179INTERCHANGEABLE
JACK,TIP
399
5935-00-284-3922INTERCHANGEABLE
JACK,TELEPHONE
399
6220-00-472-4166INTERCHANGEABLE
LIGHT,MARKER,CLEARANCE
915119
5985-00-504-7776INTERCHANGEABLE
HORN,WAVEGUIDE
AT153U
5950-00-536-3990INTERCHANGEABLE
CORE
6240-00-865-3257INTERCHANGEABLE
LAMP,INCANDESCENT
1399
3110-01-212-4720INTERCHANGEABLE
BEARING,BALL,ANNULAR
S0399
5120-01-399-9199INTERCHANGEABLE
PLIERS,RETAINING RING
6680-01-722-6266INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
1/2" FIF-D/BRZ/NEO

Frequently Asked Questions

What is NSN 4820-01-509-1400?

NSN 4820-01-509-1400 is a Valve,vacuum Regulating, manufactured by Airtech International Inc Dba Airtech International Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-509-1400?

NSN 4820-01-509-1400 has 1 cross-referenced part number: 399 (Airtech International Inc Dba Airtech International Inc).

What NSN replaces 4820-01-509-1400?

There are 12 known substitutes for 4820-01-509-1400: 4935-00-065-2977, 5110-00-083-0042, 3030-00-103-2303 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 399?

Key specifications for 399: Body Material: ALUMINUM; Body Style: SINGLE CONNECTION, STRAIGHT FLOW; First End Style Designator: PLAIN; First End Inside Diameter Hose Accommodated: 0.250 INCHES NOMINAL IN. 14 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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