PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

79 3-4Valve,air Venting,steam

Itt Fluid Technology Corp Itt Mcdonnell and Miller · NSN 4520-00-862-1676 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-00-862-1676 — this item is cataloged by the U.S. Government under National Stock Number 4520-00-862-1676. Primary manufacturer part number: 79 3-4.
Features
  • Valve,air Venting,steam — FSC 4520
  • Overall Diameter: 2.440 INCHES NOMINAL IN
  • Valve Shape: VERTICAL STRAIGHT
  • Valve Connection Size: 0.750 INCHES IN
  • Valve Type: QUICK AIR VENT
  • Surface Treatment: ENAMEL
  • Operating Pressure: 75.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • Material: COPPER ALLOY
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy construction
General Description

The Valve,air Venting,steam, cataloged under National Stock Number 4520-00-862-1676, is classified within Federal Supply Class 4520 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Itt Fluid Technology Corp Itt Mcdonnell and Miller. Government technical data includes 8 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-00-862-1676
Primary Part Number79 3-4
Item NameValve,air Venting,steam
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerItt Fluid Technology Corp Itt Mcdonnell and Miller
StatusACTIVE
Overall Diameter2.440 INCHES NOMINAL IN
Valve ShapeVERTICAL STRAIGHT
Valve Connection Size0.750 INCHES IN
Valve TypeQUICK AIR VENT
Surface TreatmentENAMEL
Operating Pressure75.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
MaterialCOPPER ALLOY
Valve Air Return PreventionREQUIRED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
7510-00-162-6157 INTERCHANGEABLE
Eraser,steel
2920-00-217-90587934 INTERCHANGEABLE
Lead,ignition,engine
Champion Aerospace Llc
5315-00-276-019397217 INTERCHANGEABLE
Pin,straight,headless
Fwd Seagrave Holdings Lp
4820-00-289-0885155-3/4IN INTERCHANGEABLE
Valve,safety Relief
Jayco Incorporated
6250-00-508-26008770871 INTERCHANGEABLE
Lampholder
Army, United States Department of the Dba Watervliet Arsenal Div Business Development
5998-01-035-72387-934 INTERCHANGEABLE
Circuit Card Assembly
Rogerson Kratos
2520-01-081-93847934 INTERCHANGEABLE
Transmission,hydraulic,vehicular
Funk Mfg Co Sub of Deere and Co
6625-01-257-94897934 INTERCHANGEABLE
Oscilloscope
Tektronix, Inc.
5340-01-374-55327934 INTERCHANGEABLE
Clamp,loop
Carlisle & Finch Co
Cross-Reference Index
Part NumberManufacturer
79 3-4 PRIMARY Itt Fluid Technology Corp Itt Mcdonnell and Miller (USA)
Related Parts
7510-00-162-6157INTERCHANGEABLE
ERASER,STEEL
2920-00-217-9058INTERCHANGEABLE
LEAD,IGNITION,ENGINE
7934
5315-00-276-0193INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
97217
4820-00-289-0885INTERCHANGEABLE
VALVE,SAFETY RELIEF
155-3/4IN
6250-00-508-2600INTERCHANGEABLE
LAMPHOLDER
8770871
5998-01-035-7238INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
7-934
2520-01-081-9384INTERCHANGEABLE
TRANSMISSION,HYDRAULIC,VEHICULAR
7934
6625-01-257-9489INTERCHANGEABLE
OSCILLOSCOPE
7934
5340-01-374-5532INTERCHANGEABLE
CLAMP,LOOP
7934

Frequently Asked Questions

What is NSN 4520-00-862-1676?

NSN 4520-00-862-1676 is a Valve,air Venting,steam, manufactured by Itt Fluid Technology Corp Itt Mcdonnell and Miller, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-00-862-1676?

NSN 4520-00-862-1676 has 1 cross-referenced part number: 79 3-4 (Itt Fluid Technology Corp Itt Mcdonnell and Miller).

What NSN replaces 4520-00-862-1676?

There are 9 known substitutes for 4520-00-862-1676: 7510-00-162-6157, 2920-00-217-9058, 5315-00-276-0193 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 79 3-4?

Key specifications for 79 3-4: Overall Diameter: 2.440 INCHES NOMINAL IN; Valve Shape: VERTICAL STRAIGHT; Valve Connection Size: 0.750 INCHES IN; Valve Type: QUICK AIR VENT. 10 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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